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Weather in Sioux Falls, South Dakota for August 2025

Your guide to Sioux Falls weather in August - trends and predictions

    Official Weather Alert ⚠️

  • Meteorological - Air Quality Alert - See hour by hour.

    • Temperatures

  • The forecast for the next days in Sioux Falls predicts temperatures to be around 28 °F, close to the historical average.

  • In general, the average temperature in Sioux Falls at the beginning of August is 27.3 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 34 °F by the end of August.

    • Rain 🌧️

  • The climate of Sioux Falls in August is notably wet, with an average of 11 rainy days, and a total of 74.1 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
20
Dry days
Average rainy days
11
Rainy days
Average snowy days
0
Snow days
Average temperatures
29°/16°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
64 %
Avg humidity

Sioux Falls Weather August

Move between months or click on a day
July
September
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Weather Alert Partly cloudy
25°
2
Weather Alert Sunny
28°
3
Weather Alert Moderate rain
26°
4
Weather Alert Moderate rain
20°
5
Patchy rain possible
28°
6
Moderate rain
31°
7
Sunny
33°
8
Sunny
33°
9
Partly cloudy
28°
10
Partly cloudy
26°
11
Sunny
24°
12
Sunny
27°
13
Patchy rain possible
33°
14
Patchy rain possible
34°
15
Overcast
27°
16
Partly cloudy
30°
17
Sunny
25°
18
Overcast
28°
19
Patchy rain possible
32°
20
Overcast
25°
21
Cloudy
33°
22
Sunny
35°
23
Partly cloudy
35°
24
Patchy rain possible
31°
25
Light rain shower
38°
26
Overcast
35°
27
Sunny
31°
28
Mist
34°
29
Sunny
32°
30
Sunny
32°
31
Sunny
36°

Temperatures trend during August in Sioux Falls

See the weather trend as well as the moving average line

August weather in Sioux Falls day by day

Click on a date for more information
July September
Date Weather Temperatures Rain UV More
Aug. 1 Partly cloudy
Partly cloudy
 25° /12° 0 mm 1.6
Aug. 2 Sunny
Sunny
 28° /13° 0 mm 1.1
Aug. 3 Moderate rain
Moderate rain
 26° /18° 9.8 mm 0.8
Aug. 4 Moderate rain
Moderate rain
 20° /17° 14.2 mm 1.2
Aug. 5 Patchy rain possible
Patchy rain possible
 28° /17° 1.1 mm 0
Aug. 6 Moderate rain
Moderate rain
 31° /20° 8.6 mm 5
Aug. 7 Sunny
Sunny
 33° /22° 0 mm 7
Aug. 8 Sunny
Sunny
 33° /21° 0 mm 7
Aug. 9 Partly cloudy
Partly cloudy
 28° /19° 0 mm 6
Aug. 10 Partly cloudy
Partly cloudy
 26° /16° 0 mm 6
Aug. 11 Sunny
Sunny
 24° /12° 0 mm 5
Aug. 12 Sunny
Sunny
 27° /11° 0 mm 5
Aug. 13 Patchy rain possible
Patchy rain possible
 33° /15° 0.2 mm 5
Aug. 14 Patchy rain possible
Patchy rain possible
 34° /17° 2.1 mm 5
Aug. 15 Overcast
Overcast
 27° /14° 0 mm 6
Aug. 16 Partly cloudy
Partly cloudy
 30° /15° 0 mm 7
Aug. 17 Sunny
Sunny
 25° /14° 0 mm 6
Aug. 18 Overcast
Overcast
 28° /13° 0 mm 6
Aug. 19 Patchy rain possible
Patchy rain possible
 32° /17° 0.1 mm 8
Aug. 20 Overcast
Overcast
 25° /17° 0.2 mm 6
Aug. 21 Cloudy
Cloudy
 33° /16° 0.6 mm 7
Aug. 22 Sunny
Sunny
 35° /19° 1.3 mm 9
Aug. 23 Partly cloudy
Partly cloudy
 35° /19° 0.7 mm 8
Aug. 24 Patchy rain possible
Patchy rain possible
 31° /20° 0.4 mm 7
Aug. 25 Light rain shower
Light rain shower
 38° /19° 2.7 mm 8
Aug. 26 Overcast
Overcast
 35° /18° 0 mm 8
Aug. 27 Sunny
Sunny
 31° /13° 0 mm 7
Aug. 28 Mist
Mist
 34° /14° 0.3 mm 8
Aug. 29 Sunny
Sunny
 32° /14° 0.9 mm 8
Aug. 30 Sunny
Sunny
 32° /15° 0 mm 8
Aug. 31 Sunny
Sunny
 36° /14° 0 mm 9
Next
Important Notice
Our weather forecast for Sioux Falls 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 Sioux Falls forecast closer to your planned date for the most up-to-date weather information.
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Sioux Falls in August - FAQ

What are the expected maximum and minimum temperatures in Sioux Falls 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 Sioux Falls during August?
Moderate rainfall is anticipated in Sioux Falls 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 Sioux Falls during August?
The average wind speed in Sioux Falls during August is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

August rainfall patterns in Sioux Falls

Explore the daily rainfall trends and prepare for Sioux Fallss August weather 💧

UV exposure in Sioux Falls during August

Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️

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Location coordinates Where is Sioux Falls?

Get accurate weather forecasts for Sioux Falls, located at latitude 43.55 and longitude -96.7. Stay updated with localized weather information tailored for Sioux Falls.

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