South Dakota (Sioux Falls)
August
Weather in South Dakota for August 2025
Your guide to South Dakota weather in August - trends and predictions
Meteorological - Air Quality Alert - See hour by hour.
The forecast for the next days in South Dakota predicts temperatures to be around 28 °F, close to the historical average.
In general, the average temperature in South Dakota at the beginning of August is 27.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 34 °F by the end of August.
The climate of South Dakota in August is notably wet, with an average of 11 rainy days, and a total of 74.1 mm of precipitation.
New! Chat with our AI weatherman - it’s amazing and free.
Official Weather Alert ⚠️
Temperatures
Rain 🌧️
More
20
Dry days
11
Rainy days
0
Snow days
29°/16°
Temperatures
22 km/h
Avg max wind
64 %
Avg humidity
South Dakota Weather August
Move between months or click on a day
What’s the Weather Like in South Dakota This August?
Discover the average temperatures and weather trends across South Dakota’s cities this August.
Temperatures trend during August in South Dakota
See the weather trend as well as the moving average line
August weather in South Dakota day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Overcast | 24° /13° | 0 mm | 1.6 | |
| Aug. 2 |  Patchy rain possible | 26° /13° | 0.4 mm | 1.1 | |
| Aug. 3 |  Heavy rain | 26° /17° | 93.8 mm | 0.8 | |
| Aug. 4 | Patchy rain possible | 26° /16° | 0.6 mm | 1.2 | |
| Aug. 5 |  Partly cloudy | 27° /16° | 0 mm | 0 | |
| Aug. 6 | Patchy rain possible | 29° /19° | 4.4 mm | 5 | |
| Aug. 7 |  Thundery outbreaks possible | 32° /22° | 0.1 mm | 6 | |
| Aug. 8 | Patchy rain possible | 29° /20° | 3.7 mm | 5 | |
| Aug. 9 |  Moderate rain | 24° /15° | 15.1 mm | 4 | |
| Aug. 10 |  Sunny | 27° /15° | 0 mm | 6 | |
| Aug. 11 | Sunny | 28° /15° | 0 mm | 6 | |
| Aug. 12 | Patchy rain possible | 32° /19° | 0.5 mm | 6 | |
| Aug. 13 | Patchy rain possible | 31° /20° | 0.4 mm | 6 | |
| Aug. 14 | Heavy rain | 26° /19° | 20.7 mm | 5 | |
| Aug. 15 | Overcast | 27° /14° | 0 mm | 6 | |
| Aug. 16 | Partly cloudy | 30° /15° | 0 mm | 7 | |
| Aug. 17 | Sunny | 25° /14° | 0 mm | 6 | |
| Aug. 18 | Overcast | 28° /13° | 0 mm | 6 | |
| Aug. 19 | Patchy rain possible | 32° /17° | 0.1 mm | 8 | |
| Aug. 20 | Overcast | 25° /17° | 0.2 mm | 6 | |
| Aug. 21 |  Cloudy | 33° /16° | 0.6 mm | 7 | |
| Aug. 22 | Sunny | 35° /19° | 1.3 mm | 9 | |
| Aug. 23 | Partly cloudy | 35° /19° | 0.7 mm | 8 | |
| Aug. 24 | Patchy rain possible | 31° /20° | 0.4 mm | 7 | |
| Aug. 25 | Light rain shower | 38° /19° | 2.7 mm | 8 | |
| Aug. 26 | Overcast | 35° /18° | 0 mm | 8 | |
| Aug. 27 | Sunny | 31° /13° | 0 mm | 7 | |
| Aug. 28 |  Mist | 34° /14° | 0.3 mm | 8 | |
| Aug. 29 | Sunny | 32° /14° | 0.9 mm | 8 | |
| Aug. 30 | Sunny | 32° /15° | 0 mm | 8 | |
| Aug. 31 | Sunny | 36° /14° | 0 mm | 9 | |
| Next | |||||
Important Notice
Our weather forecast for South Dakota 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 South Dakota forecast closer to your planned date for the most up-to-date weather information.
Change Month
South Dakota in August - FAQ
What are the expected maximum and minimum temperatures in South Dakota during August?
During August, expect a variety of temperatures with highs around 29° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in South Dakota during August?
Moderate rainfall is anticipated in South Dakota during August, with a total of 74.1 mm spread over approximately 11 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in South Dakota during August?
The average wind speed in South Dakota during August is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in South Dakota
Explore the daily rainfall trends and prepare for South Dakotas August weather 💧
UV exposure in South Dakota during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
Counties in South Dakota
Select a county for an accurate weather forecast
Top locations in South Dakota
Select a location for an accurate weather forecast
More Locations Quick links
More South Dakota weather pages
You are here
Where is South Dakota?Get accurate weather forecasts for South Dakota, located at latitude 43.55 and longitude -96.7. Stay updated with localized weather information tailored for South Dakota.
Found a mistake?
We appreciate your attention to details. Tell us here.