Sioux Falls (SD)
September
Weather in Sioux Falls, South Dakota for September 2027
Your guide to Sioux Falls weather in September - trends and predictions
In general, the average temperature in Sioux Falls at the beginning of September is 29.2 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 25.1 °C by the end of September.
Sioux Falls experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 216.5 mm.
Is September a good time to visit Sioux Falls? check out the best time to travel to Sioux Falls page.
✨ Is September a good time to visit Sioux Falls? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
22
Dry days
8
Rainy days
0
Snow days
27°/13°
Temperatures
24 km/h
Avg max wind
65 %
Avg humidity
Sioux Falls Weather September
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Temperatures trend during September in Sioux Falls
See the weather trend as well as the moving average line
September weather in Sioux Falls day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate rain | 28° /15° | 22.5 mm | 5 | |
| Sept. 2 |  Patchy rain possible | 32° /14° | 1.3 mm | 7 | |
| Sept. 3 |  Thundery outbreaks possible | 32° /15° | 0.4 mm | 7 | |
| Sept. 4 | Patchy rain possible | 34° /15° | 1.9 mm | 7.3 | |
| Sept. 5 |  Heavy rain | 28° /15° | 103.7 mm | 6 | |
| Sept. 6 |  Light rain | 25° /11° | 3.7 mm | 4 | |
| Sept. 7 |  Sunny | 26° /8° | 0.1 mm | 6 | |
| Sept. 8 | Moderate rain | 30° /13° | 16.9 mm | 6 | |
| Sept. 9 | Thundery outbreaks possible | 29° /16° | 1 mm | 6.8 | |
| Sept. 10 |  Fog | 29° /15° | 0.2 mm | 6 | |
| Sept. 11 | Mist | 29° /13° | 0 mm | 6.6 | |
| Sept. 12 | Thundery outbreaks possible | 28° /13° | 0 mm | 6.5 | |
| Sept. 13 |  Partly cloudy | 30° /14° | 0 mm | 6.4 | |
| Sept. 14 | Light rain | 28° /13° | 3.8 mm | 6 | |
| Sept. 15 | Fog | 28° /15° | 0.9 mm | 6 | |
| Sept. 16 | Partly cloudy | 28° /14° | 0.5 mm | 6 | |
| Sept. 17 | Thundery outbreaks possible | 25° /14° | 3.8 mm | 5 | |
| Sept. 18 | Moderate rain | 27° /15° | 13.3 mm | 5 | |
| Sept. 19 | Light rain | 26° /15° | 4.2 mm | 5 | |
| Sept. 20 | Light rain | 24° /12° | 3.2 mm | 5 | |
| Sept. 21 | Light rain | 22° /12° | 3 mm | 5 | |
| Sept. 22 | Light rain | 22° /11° | 3.1 mm | 4 | |
| Sept. 23 | Light rain | 22° /11° | 9.9 mm | 5 | |
| Sept. 24 | Light rain | 22° /12° | 4.1 mm | 4 | |
| Sept. 25 | Patchy rain possible | 24° /12° | 0.9 mm | 5 | |
| Sept. 26 | Light rain | 25° /12° | 6.2 mm | 5 | |
| Sept. 27 | Light rain | 25° /13° | 2.6 mm | 5 | |
| Sept. 28 | Sunny | 26° /11° | 0.4 mm | 5 | |
| Sept. 29 | Light rain | 29° /14° | 5.1 mm | 5 | |
| Sept. 30 |  Overcast | 26° /15° | 0 mm | 4.9 | |
| Next | |||||
Important Notice
Our weather forecast for Sioux Falls in September 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.
Change Month
Sioux Falls in September - FAQ
What are the expected maximum and minimum temperatures in Sioux Falls during September?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Sioux Falls during September?
Significant rainfall exceeding 216.5 mm is expected in Sioux Falls during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sioux Falls during September?
The average wind speed in Sioux Falls during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Sioux Falls
Explore the daily rainfall trends and prepare for Sioux Fallss September weather 💧
Typically, Sioux Falls has 8 rainy days in September with a total of 216.5 mm of rainfall.
UV exposure in Sioux Falls during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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