Sioux City (IA)
September
Weather in Sioux City, Iowa for September 2027
Your guide to Sioux City weather in September - trends and predictions
The climate of Sioux City in September is notably wet, with an average of 12 rainy days, and a total of 209.8 mm of precipitation.
Is September a good time to visit Sioux City? check out the best time to travel to Sioux City page.
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Rain 🌧️
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18
Dry days
12
Rainy days
0
Snow days
26°/15°
Temperatures
22 km/h
Avg max wind
77 %
Avg humidity
Sioux City Weather September
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Temperatures trend during September in Sioux City
See the weather trend as well as the moving average line
September weather in Sioux City day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain | 28° /17° | 4.9 mm | 4 | |
| Sept. 2 |  Fog | 31° /17° | 0.6 mm | 5 | |
| Sept. 3 |  Patchy rain possible | 27° /16° | 2.1 mm | 6 | |
| Sept. 4 |  Overcast | 29° /15° | 0 mm | 6 | |
| Sept. 5 |  Sunny | 29° /15° | 0.4 mm | 7 | |
| Sept. 6 |  Heavy rain | 26° /12° | 87.1 mm | 4 | |
| Sept. 7 | Light rain | 27° /11° | 4 mm | 3 | |
| Sept. 8 |  Moderate rain | 30° /17° | 12.9 mm | 4 | |
| Sept. 9 |  Thundery outbreaks possible | 27° /17° | 0 mm | 7 | |
| Sept. 10 | Mist | 29° /15° | 0 mm | 7 | |
| Sept. 11 | Overcast | 30° /17° | 0.2 mm | 6 | |
| Sept. 12 |  Partly cloudy | 28° /17° | 0 mm | 6.8 | |
| Sept. 13 | Patchy rain possible | 29° /15° | 1.2 mm | 6.7 | |
| Sept. 14 | Moderate rain | 28° /15° | 13 mm | 4 | |
| Sept. 15 | Patchy rain possible | 28° /15° | 2.2 mm | 4 | |
| Sept. 16 | Mist | 29° /15° | 0.2 mm | 5 | |
| Sept. 17 |  Patchy light rain with thunder | 24° /18° | 3.7 mm | 4 | |
| Sept. 18 |  Heavy rain at times | 28° /18° | 18.4 mm | 3 | |
| Sept. 19 | Patchy rain possible | 22° /15° | 1.9 mm | 3 | |
| Sept. 20 | Patchy rain possible | 20° /12° | 1.4 mm | 3 | |
| Sept. 21 | Light rain | 21° /14° | 3.5 mm | 4 | |
| Sept. 22 |  Moderate or heavy rain shower | 22° /14° | 6.5 mm | 4 | |
| Sept. 23 | Light rain shower | 21° /14° | 2.1 mm | 4 | |
| Sept. 24 | Light rain | 20° /12° | 6.1 mm | 3 | |
| Sept. 25 | Light rain | 21° /13° | 3.8 mm | 4 | |
| Sept. 26 | Moderate rain | 25° /13° | 18.6 mm | 4 | |
| Sept. 27 | Light rain | 24° /15° | 2.5 mm | 4 | |
| Sept. 28 | Sunny | 24° /11° | 0.2 mm | 4 | |
| Sept. 29 | Light rain | 26° /15° | 8.8 mm | 4 | |
| Sept. 30 | Light rain | 24° /17° | 3.5 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Sioux City 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 City forecast closer to your planned date for the most up-to-date weather information.
Change Month
Sioux City in September - FAQ
What are the expected maximum and minimum temperatures in Sioux City during September?
During September, expect a variety of temperatures with highs around 26° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Sioux City during September?
Significant rainfall exceeding 209.8 mm is expected in Sioux City during September, occurring over more than 12 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Sioux City during September?
The average wind speed in Sioux City during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Sioux City
Explore the daily rainfall trends and prepare for Sioux Citys September weather 💧
Typically, Sioux City has 12 rainy days in September with a total of 209.8 mm of rainfall.
UV exposure in Sioux City during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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