Rapid City Weather In SeptemberRapid City Weather Forecasts. 1 Gusts 3mph Today's temperature is forecast to be WARMER than yesterday. In Rapid City, in May, the average low-temperature is 45. The average first freeze in Rapid City is October 4 and late August through September in the Black Hills. Rain and scattered thunderstorms for the afternoon. account_box Log in person_add Join settings Settings Sensor Network Maps & Radar Severe Weather News & Blogs Mobile Apps Historical Weather star 44. Overnight the average temperature in September is 50. account_box Log in person_add Join settings Settings Sensor Network Maps & Radar Severe Weather News & Blogs Mobile Apps Historical Weather star 44. Calendar overview of Months Weather Forecast. September 20 Afternoon 76° RealFeel® 76° Pleasant RealFeel Shade™ 72° Pleasant 9/20 Partly sunny Wind N 13 mph Wind Gusts 24 mph Humidity 35% Dew Point 44° Probability of Precipitation 1%. Rainfall during September is moderate with an average of 33mm (1. October, like September, is another mild autumn month in Rapid City, South Dakota, with temperature in the range of an average low of 39. Hourly forecast for Rapid City, South Dakota, USA. The months with the lowest humidity in Rapid City are August and September, with an average relative humidity of 50%. Summer will be hotter and drier than normal, with the hottest periods in mid-June, early July, and early and late August. Temperatures begin to cool around Labor Day, with September highs averaging in the 60s and 70s, falling into the 50s and 60s in October. Detailed Rapid City Weather Forecast for September 2022 – day/night temperatures, precipitations – World-Weather. Rapid City, South Dakota Long Range Weather Forecast">Rapid City, South Dakota Long Range Weather Forecast. Go Back Record-setting heat wave looms for Pacific Northwest, Western. Temperature Forecast Normal Avg High Temps 60 to 75 ° Avg Low Temps 35 to 50 ° Avg High Temps 15 to 25 ° Avg Low Temps 0 to 10 ° Rain Frequency 5 to 7 days Click or Tap on any day for a detailed forecast. The last month of the spring, May, is an enjoyable month in Rapid City, South Dakota, with temperature in the range of an average high of 63. October This month usually exhibits the best weather. If you're looking for the very warmest time to visit Rapid City, the hottest months are July, August, and then June. Weather in Rapid City in September 2020 (South Dakota ">Weather in Rapid City in September 2020 (South Dakota. Some would describe it as mildly cool with a gentle breeze. Maximum daytime temperature = 22 - 30°C [] Daily hours of sunshine = 10 hours or more []. Rapid City, SD Weather Forecast Office October 12-13, 2021 Early Winter Storm Brings Heavy Snow and Heavy Rain Weather. In Rapid City, the average high-temperature in May rises from a cool 53. Wind in Rapid City is usually moderate. Radar Satellite WunderMap |Nexrad Today Tue 05/09 High 79 °F 15% Precip. Detailed ⚡ Rapid City Weather Forecast for September 2022 – day/night 🌡️ temperatures, precipitations – World-Weather. See more current weather Hour-by-hour Forecast in Rapid City — Graph °F Wednesday, May 10, 2023 4 pm 76 13 5 pm 76 12 6 pm. In September, the average low-temperature is 54°F (12. Best Time to Visit Rapid City. Rapid City, SD Monthly Weather Forecast. Rapid City weather in September Rapid City weather by month // weather averages < > Data: 1991 - 2021 Min. Climate & Weather Averages in Rapid City, South Dakota, USA. Daytime maximum temperatures average around 20°C (68°F), whilst at night 8°C (47°F) is normal. Daytime temperatures usually reach 23°C in Rapid City in September, falling to 7°C at night. Rapid City weather in September Rapid City weather by month // weather averages < > Data: 1991 - 2021 Min. Weather in Rapid City in September 2022. October, like September, is another mild autumn month in Rapid City, South Dakota, with temperature in the range of an average low of 39. September is in the fall / autumn in Rapid City and is typically the 4th warmest month of the year. September The hot sun tapers off this month, bringing the average daytime high down to 81 degrees Fahrenheit. The average temperature in Rapid City in September year of 2022 is +75°F. Monthly averages Rapid City Longitude: -103. gov > Rapid City, SD > October 12-13, 2021 Early Winter Storm Brings Heavy Snow and Heavy Rain Current Hazards Current Conditions Radar Forecasts Rivers and Lakes Climate and Past Weather Local Programs Overview. Rapid City, SD Daily Weather | AccuWeather. Weather Averages in Rapid City, South Dakota, USA">Climate & Weather Averages in Rapid City, South Dakota, USA. Rapid City September Weather. The average maximum daytime temperature in Rapid City in September lies at 25. There are generally around 7 rainy days. The average temperature in Rapid City in September for a typical day ranges from a high of 79°F (26°C) to a low of 51°F (11°C). Daily low temperatures decrease by 11°F , from 56°F to 45°F , rarely falling below 34°F or exceeding 65°F. Detailed Rapid City Weather Forecast for September 2021 – day/night temperatures, precipitations – World-Weather. Rapid City summers are perfect for water recreation and camping, but bring a jacket, as evenings can be cool. 14 in Rain showers along with windy conditions. See more current weather Annual Weather Averages Near Rapid City. Rapid City 14 Day Extended Forecast Time Zone DST Changes Sun & Moon Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 56 °F. Summer: From June to August the climate is pretty warm in the daytime but nights tend to be chilly. In Rapid City, South Dakota, the average high-temperature in September marginally drops from a warm 82. All-Time Recorded High The highest temperature ever recorded in Rapid City, South Dakota was 111 °F which occurred on July 15, 2006. Rapid City has some comfortably humid months, with slightly drier months on the other side of the year. Weather Forecast Legend WeatherTAB helps you plan activities on days with the least risk of rain. Rapid City, SD Weather Advisories. Annual Weather Averages Near Rapid City. Occasional cold fronts moving through the area bring blustery northwest. Temperature °C (°F), Precipitation / Rainfall mm (in), Humidity, Rainy days. December Weather in Rapid City South Dakota, United States Daily high temperatures decrease by 6°F, from 41°F to 35°F, rarely falling below 13°F or exceeding 58°F. Humidity In Rapid City, the average relative humidity in May is 64%. See average monthly temperatures below. Winter storm to bring several inches of snow, blizzard. gov > Rapid City, SD Current Hazards Current Conditions Radar Forecasts Rivers and Lakes Climate and Past Weather Local Programs Click a location below for detailed forecast. The average maximum daytime temperature in Rapid City in September lies at 25. Hour-by-Hour Forecast for Rapid City, South Dakota, USA Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 78 °F. Rapid City weather averages: Best time to go. Daytime temperatures usually reach 23°C in Rapid City in September, falling to 7°C at night. September Weather in Rapid City South Dakota, United States Daily high temperatures decrease by 14°F, from 82°F to 69°F, rarely falling below 53°F or exceeding 93°F. In Rapid City, South Dakota, the average high-temperature in September marginally drops from a warm 82. May 2023 Long Range Weather Forecast for High Plains; Dates Weather Conditions; May 1-4: Showers, mild:. 2°C) in August to a still moderately hot 73. 5% relative humidity), and the most humid month is December (58. Rapid City Weather in September 2022. Rapid City, South Dakota daily local news from KOTA Territory TV. 3°C) in September to a mild 56. September Weather in Rapid City South Dakota, United States Daily high temperatures decrease by 14°F , from 82°F to 69°F , rarely falling below 53°F or exceeding 93°F. Toggle navigation September 2024; October 2024; Jun. Wind and hail are the greatest threat. Average Precipitation for South Dakota in September The tables below give monthly averages for rainfall plus snowfall during September at cities, towns and parks in South Dakota. Averages are for Ellsworth Air Force Base, which is 7 miles from Rapid City. Average weather in September 2022 1 days Precipitation 7 days Cloudy 20 days Sunny Day +76 °F Night +61 °F Compare with another month Extended weather forecast in Rapid City Hourly Week 10 days 14 days Month Year. The best time to visit Rapid City is undoubtedly during the Fall period of September to November. The average maximum daytime temperature in Rapid City in September lies at 25. Averages are for Ellsworth Air Force Base, which is 7 miles from Rapid City. 5% relative humidity), and the. Rapid City 14 Day Extended Forecast Time Zone DST Changes Sun & Moon Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 56 °F. 6°C) with temperatures rarely dropping below 62. Fall (September-November) Beautiful days with comfortable, warm weather through September and crisp cool nights into November make fall an excellent time to explore Rapid City and the Black Hills. Humidity In Rapid City, the average relative humidity in October is 58%. The least humid month is September (40. Rapid City, South Dakota weather in September. Rapid City, South Dakota weather averages and records from 1948–2023 based on data made available by the NOAA. Temperature °C (°F), Precipitation /. Potential for severe thunderstorms. The climate in Rapid City during September can be summarized as mild and a little damp. This annual event takes place at the end of September and helps keep the herd population in balance since the park can only sustain a certain number of bison. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is computed to be 84. Get the monthly weather forecast for Rapid City, SD, including daily high/low, historical averages, to help you plan ahead. Rapid City has some comfortably humid months, with slightly drier months on the other side of the year. Rapid City, SD Daily Weather | AccuWeather. In Rapid City, South Dakota, the average high-temperature in September marginally drops from a warm 82. Weeks with ideal weather are listed above. 12, 2023 at 10:16:10 am CDT Watches, Warnings & Advisories Zoom Out Flood Warning Wind Advisory Flood Watch Hazardous Weather Outlook. Rapid City, South Dakota Long Range Weather Forecast. Our forecasts are not direct predictions of rain/snow. Daily low temperatures decrease by 6°F, from 23°F to 17°F, rarely falling below -2°F or exceeding 36°F. The average low-temperature, in Rapid City, is 39. September Weather in Rapid City South Dakota, United States Daily high temperatures decrease by 14°F , from 82°F to 69°F , rarely falling below 53°F or exceeding 93°F. Average weather in September 2021 1 days Precipitation 9 days Cloudy 20 days Sunny Day +75 °F Night +61 °F Compare with another month Extended weather forecast in Rapid City Hourly Week 10 days 14 days Month Year. 59 inches with rain usually falling on 8 days. Weather in Rapid City in September 2021 (South Dakota. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Rapid City area. Fall (September-November) Beautiful days with comfortable, warm weather through September and crisp cool nights into November make fall an excellent time to explore Rapid City and the Black Hills. The area's first snowfall is usually in October, although higher elevations sometimes receive snow in September. 2021 Early Winter Storm Brings Heavy Snow and ">October 12. The average maximum daytime temperature in Rapid City in September lies at 25. The warmest time of year is generally mid July where highs are regularly around 90. Rain is still possible, however, so plan accordingly. Know what's coming with AccuWeather's extended daily forecasts for Rapid City, SD. The weather during daytime is extremely comfortable and nights are crispy cool. Station Data. Average weather in September 2022 1 days Precipitation 7 days Cloudy 20 days Sunny Day +76 °F Night +61 °F Compare with another month Extended weather forecast in Rapid City Hourly Week 10 days 14 days Month Year. The windiest month is April, followed by May and January. On average September is the 4th wettest month of the year in Rapid City with around 30mm of rain making it a dry time to visit. Up to 90 days of daily highs, lows, and precipitation chances. 14 in Rain showers along with windy conditions. Rapid City has some comfortably humid months, with slightly drier months on the other side of the year. 5" (38mm) of precipitation is typically accumulated. Current Weather. The climate in Rapid City during September can be summarized as mild and dry. The average temperature in Rapid City in September year of 2022 is +75°F. The best time to visit Rapid City is undoubtedly during the Fall period of September to November. Rapid City, SD's afternoon weather forecast for today and the next 15 days. In Rapid City, the average high-temperature in May rises from a cool 53. Highest Temperatures: All-Time By Year All-Time Recorded Low. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for. Based on weather reports collected during 1985–2015. (Weather station: Ellsworth Air Force Base, USA). Some would describe it as moderately chilly with a gentle breeze. Children are back in school, and families have largely left the park, making this season the best time for a visit. The average minimum temperature goes down to around 8. Long-Range Weather Forecast for Rapid City, SD. gov > Rapid City, SD Current Hazards Current Conditions Radar Forecasts Rivers and Lakes Climate and Past Weather Local Programs Click a location below for detailed forecast. In Rapid City, South Dakota, the average high-temperature in September marginally drops from a warm 82. Climate & Weather Averages in Rapid City, South Dakota, USA. Rainfall during September is moderate with an average of 33mm (1. Free 2-Month Weather Forecast. Rapid City September Weather Averages and records for weather in Rapid City, South Dakota in the month of September. Get the monthly weather forecast for Rapid City, SD, including daily high/low, historical averages, to help you plan ahead. 1 Gusts 3mph Today's temperature is forecast to be WARMER than yesterday. 80° 47° 4 78° 46° 5 72° 48° 6 72° 39° 7 69° 40° 8 71° 50° 9 82° 50° 10 80° 56° 11 70° 51° 12 57° 49° 13 60° 50° Thu 11 | Day 70° 67% SSE 13 mph Rain and scattered thunderstorms for the afternoon. The average temperature in Rapid City in September for a typical day ranges from a high of 79°F (26°C) to a low of 51°F (11°C). On average, September and October will be warmer and slightly wetter than normal. Detailed ⚡ Rapid City Weather Forecast for September 2021 – day/night 🌡️ temperatures, precipitations – World-Weather. On Saturday, winds aloft will begin to become more southwesterly, helping to diminish the smokey conditions by Sunday. Not all risky days will. Detailed ⚡ Rapid City Weather Forecast for September 2021 - day/night 🌡️ temperatures, precipitations - World-Weather. Rapid City, South Dakota, USA 14 day weather forecast. Weather in Rapid City in September 2021 (South Dakota ">Weather in Rapid City in September 2021 (South Dakota. The climate in Rapid City during September can be summarized as mild and a little damp. On average September is the 6th wettest month of the year in Rapid City with around 30mm of rain making it a dry time to visit. The weather during daytime is extremely comfortable and. Rapid City Weather Forecasts. Rapid City man sentenced to 70 years for manslaughter Andrew Thorson, 31, was sentenced to 70 years in prison for first-degree manslaughter after he admitted to killing 24-year-old Dhani Aronson. The average maximum daytime temperature in Rapid City in September lies at 25. In the Northern Hills, specifically in areas of Lawrence County, 2 feet of snow or more is. Weather in Rapid City in September 2021. Rapid City Weather Records. Average weather in September 2021 1 days Precipitation 9 days Cloudy 20 days Sunny Day +75 °F Night +61 °F Compare with another month Extended weather forecast in Rapid City Hourly Week 10 days 14 days Month Year. Days that chilly can occur from October to April. The least humid month is September (40. The average temperature in Rapid City in May for a typical day ranges from a high of 69°F (21°C) to a low of 43°F (6°C). Rapid City man sentenced to 70 years for manslaughter Andrew Thorson, 31, was sentenced to 70 years in prison for first-degree manslaughter after he admitted to killing 24-year-old Dhani Aronson. 71° 50° 9 82° 50° 10 78° 55° 11 70° 52° 12 59° 50° 13 57° 48° Wed 10 | Day 78° 24% ESE 13 mph Sunshine and clouds mixed. Average Precipitation for South Dakota in September. 3°C), and the average low-temperature is 54°F (12. Rapid City 14 Day Extended Forecast Time Zone DST Changes Sun & Moon Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages). 3°F) (often the minimum temperature is noted at night). Rapid City summers are perfect for water recreation and camping, but bring a jacket, as evenings can be cool. Each place has a total for the amount of precipitation it usually receives this month. Event Tip: Arrive early, bring chairs and dress in layers as the weather can be unpredictable and change throughout the morning!. Weather in Rapid City in September 2022 (South Dakota. Daily low temperatures decrease by 11°F, from 56°F to 45°F, rarely falling below 34°F or exceeding 65°F. How sunny is it in Rapid City in September? There are normally 9 hours of bright. Best Times to Visit Rapid City. Rapid City September Weather Averages and records for weather in Rapid City, South Dakota in the month of September. Climate & Weather Averages in Rapid City, South Dakota, USA Time/General Weather Time Zone DST Changes Sun & Moon Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 80 °F. The best time to go to Rapid City is June based on the following average weather conditions. The following graphic indicates roughly where fires are currently ongoing and where smoke can be detected. Rapid City SD Average Temperatures by Month. Temperatures begin to cool around Labor Day, with September highs averaging in the 60s and 70s, falling into the 50s and 60s in October. 1 days and typically aggregates up to 2. The lowest daily average high temperature is 35°F on December 29. See more current weather Rapid City Extended Forecast with high and low temperatures May 7 - May 13. 0°F and in 1963 the average overnight temperature was 5. Daytime maximum temperatures average around 23°C (74°F), whilst at night 7°C (45°F) is normal. Rapid City, SD Weather Advisories - Warnings & Watches | AccuWeather Today Hourly Daily Radar MinuteCast Monthly Air Quality Health & Activities Rapid City Alerts 0. In September, the average low-temperature is 54°F (12. Weather in May. The average first freeze in Rapid City is October 4 and late August through September in the Black Hills. Rapid City, SD Weather Conditions. Detailed Rapid City Weather Forecast for September 2021 – day/night temperatures, precipitations – World-Weather. Detailed Rapid City Weather Forecast for September 2020 – day/night temperatures, precipitations – World-Weather. Includes the high, RealFeel, precipitation, sunrise & sunset times, as well as historical weather for that particular date. Detailed Rapid City Weather Forecast for September 2022 – day/night temperatures, precipitations – World-Weather. Rainfall In Rapid City, during 12. The average first freeze in Rapid City is October 4 and late August through September in the Black Hills. 71° 50° 9 82° 50° 10 78° 55° 11 70° 52° 12 59° 50° 13 57° 48° Wed 10 | Day 78° 24% ESE 13 mph Sunshine and clouds mixed. Get the monthly weather forecast for Rapid City, SD, including daily high/low, historical averages, to help you plan ahead. The average temperature in Rapid City in September for a typical day ranges from a high of 79°F (26°C) to a low of 51°F (11°C). See more current weather Select month:. Summer will be hotter and drier than normal, with the hottest periods in mid-June, early July, and early and late August. Rapid City, South Dakota weather averages and records from 1948–2023 based on data made available by the NOAA. Annual Weather Averages Near Rapid City. Interesting that the average daytime temperature is as +84°F while the average nightly temperature is +64°F. Humidity August and September, with an average relative humidity of 50%, are the least humid months in Rapid City. According to the latest forecast Monday morning, Rapid City could see between 6 and 8 inches of snow. For comparison, the hottest month in Rapid City, July, has days with highs of 91°F (33°C) and lows of 62°F (17°C). On average, September and October will be warmer and slightly wetter than normal. September Climate & Weather Averages in Rapid City. Get the monthly weather forecast for Rapid City, SD, including daily high/low, historical averages, to help you plan ahead. Annual Weather Averages Near Rapid City. Lows drop from the 30s and 40s into the 20s and 30s. The last month of the spring, May, is an enjoyable month in Rapid City, South Dakota, with temperature in the range of an average high of 63. Rapid City, SD Weather History. 0453 Average weather Rapid City, SD - 57703. Some would describe it as mildly cool with a. Weather. The Best Time to Visit Rapid City, SD, US for Weather, …. Weather in October » Weather in November. December Weather in Rapid City South Dakota, United States. Rapid City, SD Weather Forecast, with current conditions, wind, air quality, and what to expect for the next 3 days. Fall: The temperatures are almost perfect in the autumn months of September to November. Climate & Weather Averages in Rapid City, South Dakota, USA Time/General Weather Time Zone DST Changes Sun & Moon Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 80 °F. account_box Log in person_add Join settings Settings Sensor Network Maps & Radar Severe Weather News & Blogs Mobile Apps Historical Weather star 44. Fall: The temperatures are almost perfect in the autumn months of September. 8°C) in April to an enjoyable 63. forecast for Rapid City, South Dakota, USA">Hourly forecast for Rapid City, South Dakota, USA. December Weather in Rapid City South Dakota, United States Daily high temperatures decrease by 6°F, from 41°F to 35°F, rarely falling below 13°F or exceeding 58°F. In Rapid City, in September, the average high-temperature is 73. In Rapid City, South Dakota, the average high-temperature in September marginally drops from a warm 82. 10 Day Weather - Rapid City, SD As of 12:03 am MDT There is a possible risk of severe weather this morning. Be prepared with the most accurate 10-day forecast for Rapid City, SD with highs, lows, chance of precipitation from The Weather Channel and Weather. The Best Time to Visit Rapid City, SD, US for Weather, Safety. Free 2-Month Weather Forecast Temperature and Precipitation November 2022 to October 2023 ADVERTISEMENT. Past Weather in Rapid City, South Dakota, USA — Yesterday and Last 2 Weeks Time/General Weather Time Zone DST Changes Sun & Moon Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 71 °F. Hour-by-Hour Forecast for Rapid City, South Dakota, USA Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 78 °F. Rapid City September Weather Averages and records for weather in Rapid City, South Dakota in the month of September. 10 Day Weather - Rapid City, SD As of 12:03 am MDT There is a possible risk of severe weather this morning. For comparison, the hottest month in Rapid City, July, has days with highs of 91°F (33°C) and lows of 62°F (17°C). Rapid City, SD Hourly Weather Forecast. In Rapid City, in September, the average high-temperature is 73. In Rapid City, during the entire year, the rain falls for 118. early July, and early and late August. In Rapid City, in September, the average high-temperature is 73. For an average of 43 days annually the thermometer never rises above freezing. Change city Note: Daily averages are a moving average which includes 14 days before and after. Weather Forecast Legend WeatherTAB helps you plan activities on days with the least risk of rain. Most of the attractions too are open during this period. High risk of rain/snow. Rapid City, SD, US for Weather, Safety ">The Best Time to Visit Rapid City, SD, US for Weather, Safety. September is in the fall / autumn in Rapid City and is typically the 4th warmest month of the year. Change city Note: Daily averages are a. In October, the average high-temperature plummets from a warm 73. Free Long Range Weather Forecast for Rapid City, South Dakota. Scattered showers and thunderstorms. In September, the average low-temperature is 54°F. Weather Today Weather Hourly 14 Day. Interesting that the average daytime temperature is as +84°F while the average nightly temperature. com">Rapid City, SD weather in September 1963. September Weather forecast. Eighteen of the coldest winter nights drop down to 0 °F (-18 °C) or lower. Black Hills Climate Overview. Medium risk of rain/snow. Hazy conditions will be possible on and off through September. Weather in May. Weather in Rapid City, South Dakota, USA — Yesterday or ">Past Weather in Rapid City, South Dakota, USA — Yesterday or. Go Back Record-setting heat wave looms for Pacific. Weather Underground provides local & long-range weather forecasts, weatherreports, maps & tropical weather conditions for the Rapid City area. September is in the fall / autumn in Rapid City and is typically the 4th warmest month of the year. 10 Day Weather - Rapid City, SD As of 12:03 am MDT There is a possible risk of severe weather this morning. Tonight --/ 55° 92% Wed 10 | Night 55° 92%. Forecast risk of rain/snow. Does it rain in Rapid City in September?. Rapid City September Weather Averages and records for weather in Rapid City, South Dakota in the month of September. The average temperature in Rapid City in September for a typical day ranges from a high of 79°F (26°C) to a low of 51°F (11°C). The September hottest day is the 1st September (Afternoon) with a temperature of about +100°F. Rapid City typically has 174 nights below freezing a year, that show up from September to May. Rapid City weather in September (South Dakota). September Climate & Weather Averages in Rapid City. How sunny is it in Rapid City in September? There are normally 9 hours of bright sunshine each day in Rapid City in September - that's 69% of daylight hours. Locally heavy rainfall possible. A stray shower or thunderstorm is possible. Rapid City, SD weather in May: average temperature & climate. See more current weather Rapid City Extended Forecast with high and low temperatures May 7 – May 13. Precipitation for September 1963 In September the average monthly rainfall in Rapid City, SD is 0. Past Weather in Rapid City, South Dakota, USA — Yesterday and Last 2 Weeks Time/General Weather Time Zone DST Changes Sun & Moon Weather Today Weather Hourly 14 Day Forecast Yesterday/Past Weather Climate (Averages) Currently: 71 °F. Average Monthly Weather in Rapid City Average Monthly Temperature in Rapid City ℉ ℃ 80℉ 60℉ 40℉ 20℉ 0℉ Jan Feb Mar. Temperature Forecast Normal Avg High Temps 60 to 75 ° Avg Low Temps 35 to 50 ° Avg High Temps 15 to 25 ° Avg Low Temps 0 to 10 ° Rain Frequency 5 to 7 days Click or Tap on any day for a detailed forecast. Rainfall The month with the most rainfall is May, when the rain falls for 17.