Bloomington (IN)
September
Weather in Bloomington, Indiana for September 2025
Your guide to Bloomington weather in September - trends and predictions
Until now, September 2025 in Bloomington is slightly cooler than the historical average by -1.7 °F.
The forecast for the coming days of September 2025 predicts a temperature of 30.6 °F , which is warmer than usual.
In general, the average temperature in Bloomington at the beginning of September is 25.1 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 28.3 °F by the end of September.
Bloomington experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 141.3 mm.
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Temperatures
Rain 🌧️
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22
Dry days
8
Rainy days
0
Snow days
26°/16°
Temperatures
14 km/h
Avg max wind
64 %
Avg humidity
Bloomington Weather September
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Temperatures trend during September in Bloomington
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September weather in Bloomington day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 27° /15° | 0.3 mm | 7 | |
| Sept. 2 |  Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 3 |  Overcast | 24° /14° | 0 mm | 5 | |
| Sept. 4 |  Partly cloudy | 26° /15° | 20.4 mm | 6 | |
| Sept. 5 | Sunny | 28° /15° | 6 mm | 7 | |
| Sept. 6 |  Moderate or heavy rain shower | 24° /13° | 6.2 mm | 6 | |
| Sept. 7 | Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 8 | Sunny | 22° /7° | 0 mm | 6 | |
| Sept. 9 | Sunny | 25° /10° | 0 mm | 7 | |
| Sept. 10 | Sunny | 27° /14° | 0 mm | 6 | |
| Sept. 11 | Sunny | 28° /17° | 0 mm | 7 | |
| Sept. 12 | Overcast | 29° /15° | 0 mm | 6 | |
| Sept. 13 |  Heavy rain at times | 26° /16° | 0.8 mm | 6 | |
| Sept. 14 | Partly cloudy | 30° /18° | 6.7 mm | 7 | |
| Sept. 15 | Sunny | 33° /21° | 0 mm | 1.6 | |
| Sept. 16 | Partly cloudy | 29° /19° | 0 mm | 1.5 | |
| Sept. 17 | Sunny | 28° /17° | 0 mm | 1.5 | |
| Sept. 18 | Sunny | 32° /17° | 0 mm | 1.5 | |
| Sept. 19 | Sunny | 33° /17° | 0 mm | 0 | |
| Sept. 20 | Sunny | 30° /17° | 0 mm | 6 | |
| Sept. 21 | Patchy rain possible | 30° /18° | 1.3 mm | 5 | |
| Sept. 22 | Patchy rain possible | 27° /17° | 2.4 mm | 5 | |
| Sept. 23 | Patchy rain possible | 32° /19° | 0.4 mm | 5 | |
| Sept. 24 | Sunny | 30° /17° | 0 mm | 6 | |
| Sept. 25 | Sunny | 31° /16° | 0 mm | 6 | |
| Sept. 26 | Sunny | 31° /17° | 0 mm | 6 | |
| Sept. 27 | Sunny | 31° /18° | 0 mm | 6 | |
| Sept. 28 | Sunny | 31° /17° | 0 mm | 6 | |
| Sept. 29 | Moderate rain at times | 21° /17° | 0.9 mm | 5 | |
| Sept. 30 |  Fog | 23° /18° | 0 mm | 5 | |
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Important Notice
Our weather forecast for Bloomington 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 Bloomington forecast closer to your planned date for the most up-to-date weather information.
Change Month
Bloomington in September - FAQ
What are the expected maximum and minimum temperatures in Bloomington during September?
During September, expect a variety of temperatures with highs around 26° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Bloomington during September?
Significant rainfall exceeding 141.3 mm is expected in Bloomington during September, occurring over more than 8 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Bloomington during September?
The average wind speed in Bloomington during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Bloomington
Explore the daily rainfall trends and prepare for Bloomingtons September weather 💧
UV exposure in Bloomington during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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