Minnehaha County (Sioux Falls)
September
Weather in Minnehaha County for September 2025
Your guide to Minnehaha County weather in September - trends and predictions
In general, the average temperature in Minnehaha County at the beginning of September is 32.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 27.6 °F by the end of September.
Minnehaha County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 41.1 mm.
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Temperatures
Rain 🌧️
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23
Dry days
7
Rainy days
0
Snow days
29°/12°
Temperatures
24 km/h
Avg max wind
54 %
Avg humidity
Minnehaha County in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  33° | 2  37° | 3  37° | 4  39° | 5  30° | 6  26° | 7 28° |
| 8 32° | 9 32° | 10 30° | 11 31° | 12 31° | 13 32° | 14 31° |
| 15 30° | 16 29° | 17 28° | 18 32° | 19 32° | 20 29° | 21 26° |
| 22 21° | 23 22° | 24  24° | 25 27° | 26 25° | 27 27° | 28 30° |
| 29 32° | 30  28° |
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Temperatures trend during September in Minnehaha County
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Partly cloudy | 33° /13° | 0 mm | 8 | |
| Sept. 2 | Mist | 37° /12° | 0 mm | 8 | |
| Sept. 3 | Thundery outbreaks possible | 37° /15° | 0 mm | 9 | |
| Sept. 4 | Sunny | 39° /17° | 0.4 mm | 10 | |
| Sept. 5 | Patchy rain possible | 30° /16° | 0.2 mm | 7 | |
| Sept. 6 | Cloudy | 26° /11° | 0 mm | 6 | |
| Sept. 7 | Sunny | 28° /5° | 0.1 mm | 8 | |
| Sept. 8 | Sunny | 32° /10° | 0 mm | 8 | |
| Sept. 9 | Thundery outbreaks possible | 32° /15° | 2 mm | 8 | |
| Sept. 10 | Fog | 30° /16° | 0.4 mm | 7 | |
| Sept. 11 | Mist | 31° /10° | 0 mm | 8 | |
| Sept. 12 | Thundery outbreaks possible | 31° /11° | 0 mm | 7 | |
| Sept. 13 | Partly cloudy | 32° /13° | 0 mm | 8 | |
| Sept. 14 | Partly cloudy | 31° /11° | 0.1 mm | 8 | |
| Sept. 15 | Fog | 30° /15° | 1.8 mm | 7 | |
| Sept. 16 | Partly cloudy | 29° /13° | 0.2 mm | 7 | |
| Sept. 17 | Sunny | 28° /11° | 0 mm | 7 | |
| Sept. 18 | Sunny | 32° /13° | 1.3 mm | 8 | |
| Sept. 19 | Sunny | 32° /15° | 8.4 mm | 8 | |
| Sept. 20 | Mist | 29° /12° | 0.6 mm | 7 | |
| Sept. 21 | Fog | 26° /13° | 0 mm | 6 | |
| Sept. 22 | Light rain shower | 21° /9° | 4.5 mm | 5 | |
| Sept. 23 | Light rain shower | 22° /10° | 19.6 mm | 6 | |
| Sept. 24 | Light drizzle | 24° /10° | 0.2 mm | 6 | |
| Sept. 25 | Patchy rain possible | 27° /11° | 0 mm | 7 | |
| Sept. 26 | Patchy rain possible | 25° /10° | 0 mm | 6 | |
| Sept. 27 | Patchy rain possible | 27° /12° | 0 mm | 6 | |
| Sept. 28 | Mist | 30° /10° | 0.5 mm | 7 | |
| Sept. 29 | Patchy light drizzle | 32° /14° | 1.2 mm | 8 | |
| Sept. 30 | Overcast | 28° /14° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Minnehaha County 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 Minnehaha County forecast closer to your planned date for the most up-to-date weather information.
Minnehaha County in September - FAQ
What are the expected maximum and minimum temperatures in Minnehaha County during September?
Enjoy moderate daytime temperatures of up to 29° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Minnehaha County during September?
In September, Minnehaha County can expect light to moderate rainfall, totaling 41.1 mm across approximately 7 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Minnehaha County during September?
The average wind speed in Minnehaha County during September is 24 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Minnehaha County
Explore the daily rainfall trends and prepare for Minnehaha Countys September weather 💧
UV exposure in Minnehaha County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Minnehaha County?Get accurate weather forecasts for Minnehaha County, located at latitude 43.55 and longitude -96.7. Stay updated with localized weather information tailored for Minnehaha County.
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