Pennington County (Rapid City)
August
Weather in Pennington County, South Dakota for August 2026
Your guide to Pennington County weather in August - trends and predictions
So far, August 2026 in Pennington County is slightly warmer than the historical average by 2 °F.
The forecast for the upcoming days in Pennington County predicts a temperature of 32.1 °F, which is slightly above the historical average.
In general, the average temperature in Pennington County at the beginning of August is 32 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 28.1 °F by the end of August.
The climate of Pennington County in August is notably wet, with an average of 14 rainy days, and a total of 64.5 mm of precipitation.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
17
Dry days
14
Rainy days
0
Snow days
29°/18°
Temperatures
22 km/h
Avg max wind
51 %
Avg humidity
Pennington County Weather August
Move between months or click on a day
Temperatures trend during August in Pennington County
See the weather trend as well as the moving average line
August weather in Pennington County day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Sunny | 32° /17° | 0 mm | 8 | |
| Aug. 2 | Sunny | 36° /20° | 0 mm | 9 | |
| Aug. 3 |  Cloudy | 30° /19° | 0 mm | 8 | |
| Aug. 4 | Cloudy | 31° /16° | 0 mm | 9 | |
| Aug. 5 |  Overcast | 30° /15° | 0.8 mm | 8 | |
| Aug. 6 |  Patchy rain possible | 33° /17° | 1.3 mm | 8 | |
| Aug. 7 |  Moderate or heavy rain shower | 32° /18° | 1.8 mm | 8 | |
| Aug. 8 |  Partly cloudy | 29° /16° | 0.1 mm | 7 | |
| Aug. 9 | Partly cloudy | 28° /15° | 0 mm | 8 | |
| Aug. 10 | Overcast | 29° /15° | 0.1 mm | 8 | |
| Aug. 11 | Patchy rain possible | 29° /17° | 1.8 mm | 8 | |
| Aug. 12 | Sunny | 32° /16° | 21.8 mm | 3.9 | |
| Aug. 13 | Partly cloudy | 28° /18° | 5.1 mm | 6.7 | |
| Aug. 14 | Partly cloudy | 30° /18° | 1.1 mm | 8.1 | |
| Aug. 15 | Patchy rain possible | 26° /16° | 3.7 mm | 7.4 | |
| Aug. 16 | Sunny | 32° /16° | 0.6 mm | 8 | |
| Aug. 17 | Sunny | 34° /18° | 0.1 mm | 8 | |
| Aug. 18 | Sunny | 31° /20° | 2.8 mm | 8 | |
| Aug. 19 | Sunny | 27° /17° | 8.1 mm | 7 | |
| Aug. 20 | Sunny | 29° /16° | 0.1 mm | 7 | |
| Aug. 21 | Sunny | 33° /16° | 0 mm | 8 | |
| Aug. 22 | Sunny | 39° /19° | 0 mm | 9 | |
| Aug. 23 | Sunny | 34° /19° | 0 mm | 8 | |
| Aug. 24 | Sunny | 36° /19° | 0 mm | 9 | |
| Aug. 25 | Sunny | 39° /24° | 0 mm | 9 | |
| Aug. 26 | Moderate or heavy rain shower | 26° /15° | 5.3 mm | 6 | |
| Aug. 27 | Sunny | 26° /14° | 0 mm | 7 | |
| Aug. 28 | Sunny | 28° /16° | 8.4 mm | 7 | |
| Aug. 29 | Sunny | 24° /15° | 1.5 mm | 6 | |
| Aug. 30 | Sunny | 25° /14° | 9.7 mm | 6 | |
| Aug. 31 | Sunny | 29° /16° | 0.5 mm | 8 | |
| Next | |||||
Important Notice
Our weather forecast for Pennington County in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Pennington County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Pennington County in August - FAQ
What are the expected maximum and minimum temperatures in Pennington County during August?
During August, expect a variety of temperatures with highs around 29° and lows near 18°, suitable for diverse activities and preferences.
How much rainfall should be expected in Pennington County during August?
Moderate rainfall is anticipated in Pennington County during August, with a total of 64.5 mm spread over approximately 14 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Pennington County during August?
The average wind speed in Pennington County during August is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Pennington County
Explore the daily rainfall trends and prepare for Pennington Countys August weather 💧
Typically, Pennington County has 14 rainy days in August with a total of 64.5 mm of rainfall.
UV exposure in Pennington County during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
Top locations in Pennington County
Select a location for an accurate weather forecast
More Locations Quick links
More Pennington County weather pages
You are here
Where is Pennington County?Get accurate weather forecasts for Pennington County, located at latitude 44.081 and longitude -103.231. Stay updated with localized weather information tailored for Pennington County.
Found a mistake?
We appreciate your attention to details. Tell us here.