Bloomington (IN)
September
Weather in Bloomington, Indiana for September 2026
Your guide to Bloomington weather in September - trends and predictions
So far, September 2026 in Bloomington shows a warmer trend than usual by 3.6 °F.
Expect cooler weather in the next days in Bloomington with the forecast suggesting a temperature of 26.3 °F, lower than the historical average.
In general, the average temperature in Bloomington at the beginning of September is 28.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20.7 °F by the end of September.
Bloomington experiences moderate rainfall in September, with an average of 10 rainy days and a total precipitation of 261.7 mm.
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Temperatures
Rain 🌧️
More
20
Dry days
10
Rainy days
0
Snow days
26°/16°
Temperatures
12 km/h
Avg max wind
68 %
Avg humidity
Bloomington Weather September
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Temperatures trend during September in Bloomington
See the weather trend as well as the moving average line
September weather in Bloomington day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Patchy rain possible | 30° /17° | 0.2 mm | 7 | |
| Sept. 2 |  Sunny | 29° /17° | 0 mm | 7 | |
| Sept. 3 |  Overcast | 28° /17° | 0 mm | 6 | |
| Sept. 4 |  Partly cloudy | 30° /18° | 13.6 mm | 7 | |
| Sept. 5 | Sunny | 31° /18° | 4 mm | 7 | |
| Sept. 6 |  Moderate or heavy rain shower | 26° /15° | 4.1 mm | 6 | |
| Sept. 7 | Sunny | 25° /12° | 0 mm | 6 | |
| Sept. 8 | Sunny | 26° /10° | 0 mm | 6 | |
| Sept. 9 | Sunny | 27° /14° | 2.4 mm | 7 | |
| Sept. 10 | Sunny | 26° /16° | 2.2 mm | 5 | |
| Sept. 11 | Sunny | 28° /17° | 1 mm | 5 | |
| Sept. 12 | Overcast | 29° /17° | 5.1 mm | 5 | |
| Sept. 13 |  Heavy rain at times | 27° /17° | 0.8 mm | 6 | |
| Sept. 14 | Partly cloudy | 28° /16° | 4.4 mm | 7 | |
| Sept. 15 | Sunny | 30° /17° | 0 mm | 8 | |
| Sept. 16 | Sunny | 32° /22° | 1 mm | 6.6 | |
| Sept. 17 | Overcast | 32° /23° | 0.3 mm | 5.3 | |
| Sept. 18 | Sunny | 31° /21° | 6.7 mm | 7.2 | |
| Sept. 19 |  Thundery outbreaks possible | 30° /21° | 1.1 mm | 4.8 | |
| Sept. 20 | Overcast | 34° /23° | 0.1 mm | 8 | |
| Sept. 21 | Sunny | 32° /23° | 0 mm | 7 | |
| Sept. 22 | Overcast | 28° /20° | 1 mm | 6 | |
| Sept. 23 | Overcast | 30° /20° | 0 mm | 6 | |
| Sept. 24 | Light rain shower | 24° /19° | 26.9 mm | 5 | |
| Sept. 25 | Patchy rain possible | 21° /16° | 30.1 mm | 5 | |
| Sept. 26 | Sunny | 23° /16° | 0.1 mm | 6 | |
| Sept. 27 |  Mist | 16° /11° | 0 mm | 5 | |
| Sept. 28 | Sunny | 17° /8° | 0 mm | 5 | |
| Sept. 29 | Sunny | 18° /8° | 0 mm | 5 | |
| Sept. 30 | Fog | 26° /17° | 0 mm | 6 | |
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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 261.7 mm is expected in Bloomington during September, occurring over more than 10 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 12 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 💧
Typically, Bloomington has 10 rainy days in September with a total of 261.7 mm of rainfall.
UV exposure in Bloomington during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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