Indiana (Indianapolis)
September
Weather in Indiana for September 2026
Your guide to Indiana weather in September - trends and predictions
So far, September 2026 in Indiana shows a warmer trend than usual by 3 °F.
Expect cooler weather in the next days in Indiana with the forecast suggesting a temperature of 25.9 °F, lower than the historical average.
In general, the average temperature in Indiana at the beginning of September is 29.7 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 22.1 °F by the end of September.
Indiana experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 131 mm.
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Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
27°/15°
Temperatures
14 km/h
Avg max wind
63 %
Avg humidity
Indiana Weather September
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What’s the Weather Like in Indiana This September?
Discover the average temperatures and weather trends across Indiana’s cities this September.
Temperatures trend during September in Indiana
See the weather trend as well as the moving average line
September weather in Indiana day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 2 | Sunny | 31° /16° | 0 mm | 8 | |
| Sept. 3 |  Cloudy | 31° /17° | 0 mm | 7 | |
| Sept. 4 | Sunny | 31° /18° | 6.1 mm | 7 | |
| Sept. 5 |  Thundery outbreaks possible | 32° /18° | 0.1 mm | 7 | |
| Sept. 6 |  Light rain shower | 28° /16° | 3.4 mm | 7 | |
| Sept. 7 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 8 | Sunny | 26° /12° | 0 mm | 6 | |
| Sept. 9 |  Partly cloudy | 28° /14° | 0.5 mm | 7 | |
| Sept. 10 |  Mist | 29° /16° | 1.5 mm | 6 | |
| Sept. 11 | Mist | 30° /16° | 0.3 mm | 6 | |
| Sept. 12 |  Light rain | 27° /17° | 42.6 mm | 5 | |
| Sept. 13 | Mist | 26° /15° | 0.2 mm | 6 | |
| Sept. 14 | Partly cloudy | 28° /16° | 3.1 mm | 7 | |
| Sept. 15 | Sunny | 31° /16° | 0.1 mm | 7 | |
| Sept. 16 | Light rain shower | 28° /22° | 6.7 mm | 3.4 | |
| Sept. 17 |  Overcast | 31° /23° | 2.1 mm | 6.4 | |
| Sept. 18 | Sunny | 26° /21° | 0.5 mm | 5.3 | |
| Sept. 19 | Sunny | 31° /20° | 1.9 mm | 6 | |
| Sept. 20 | Sunny | 32° /22° | 0.2 mm | 8 | |
| Sept. 21 | Overcast | 31° /25° | 4 mm | 8 | |
| Sept. 22 | Overcast | 28° /20° | 2.8 mm | 7 | |
| Sept. 23 | Overcast | 28° /19° | 0 mm | 7 | |
| Sept. 24 | Light rain shower | 25° /20° | 23.7 mm | 6 | |
| Sept. 25 | Light rain shower | 22° /17° | 19.6 mm | 5 | |
| Sept. 26 | Sunny | 22° /16° | 0.6 mm | 6 | |
| Sept. 27 | Overcast | 16° /12° | 0 mm | 4 | |
| Sept. 28 | Sunny | 17° /9° | 0 mm | 5 | |
| Sept. 29 | Mist | 26° /16° | 3.9 mm | 6 | |
| Sept. 30 | Mist | 27° /15° | 0 mm | 6 | |
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Important Notice
Our weather forecast for Indiana 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 Indiana forecast closer to your planned date for the most up-to-date weather information.
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Indiana in September - FAQ
What are the expected maximum and minimum temperatures in Indiana during September?
During September, expect a variety of temperatures with highs around 27° and lows near 15°, suitable for diverse activities and preferences.
How much rainfall should be expected in Indiana during September?
Significant rainfall exceeding 131 mm is expected in Indiana during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Indiana during September?
The average wind speed in Indiana during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Indiana
Explore the daily rainfall trends and prepare for Indianas September weather 💧
Typically, Indiana has 6 rainy days in September with a total of 131 mm of rainfall.
UV exposure in Indiana during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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