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Indiana (Indianapolis)
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Weather in Indiana for September 2025

Your guide to Indiana weather in September - trends and predictions

    Temperatures

  • Until now, September 2025 in Indiana is cooler than usual, with temperatures averaging 24.5 °F, this is -3.1 °F below the typical seasonal average.

  • The forecast for the upcoming days in Indiana predicts a temperature of 30.9 °F, which is slightly above the historical average.

  • In general, the average temperature in Indiana at the beginning of September is 27.9 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 29.7 °F by the end of September.

    • Rain 🌧️

  • Indiana experiences moderate rainfall in September, with an average of 8 rainy days and a total precipitation of 31.4 mm.

    • More

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Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
27°/15°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
60 %
Avg humidity

Indiana Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Sunny
29°
2
Mist
29°
3
Cloudy
29°
4
Partly cloudy
29°
5
Thundery outbreaks possible
30°
6
Light rain shower
27°
7
Overcast
22°
8
Sunny
23°
9
Partly cloudy
27°
10
Mist
29°
11
Mist
30°
12
Light rain
28°
13
Mist
26°
14
Partly cloudy
30°
15
Sunny
33°
16
Cloudy
31°
17
Partly cloudy
27°
18
Sunny
32°
19
Sunny
33°
20
Partly cloudy
29°
21
Patchy rain possible
31°
22
Patchy rain possible
25°
23
Patchy rain possible
33°
24
Sunny
30°
25
Sunny
32°
26
Sunny
33°
27
Sunny
32°
28
Sunny
31°
29
Mist
24°
30
Mist
26°

What’s the Weather Like in Indiana This September?

Discover the average temperatures and weather trends across Indiana’s cities this September.
CloudyIndianapolis27 °F / 15 °FCloudyFort Wayne26 °F / 13 °FCloudySouth Bend26 °F / 13 °FSunnyEvansville28 °F / 17 °FSunnyMichigan City24 °F / 16 °FPatchy rain possibleBloomington26 °F / 16 °FMore Locations

Temperatures trend during September in Indiana

See the weather trend as well as the moving average line

September weather in Indiana day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Sunny
Sunny
 29° /14° 0 mm 7
Sept. 2 Mist
Mist
 29° /14° 0 mm 7
Sept. 3 Cloudy
Cloudy
 29° /15° 0 mm 7
Sept. 4 Partly cloudy
Partly cloudy
 29° /16° 8.2 mm 7
Sept. 5 Thundery outbreaks possible
Thundery outbreaks possible
 30° /17° 0.1 mm 6
Sept. 6 Light rain shower
Light rain shower
 27° /15° 4.6 mm 6
Sept. 7 Overcast
Overcast
 22° /12° 0 mm 5
Sept. 8 Sunny
Sunny
 23° /11° 0 mm 6
Sept. 9 Partly cloudy
Partly cloudy
 27° /12° 0 mm 7
Sept. 10 Mist
Mist
 29° /14° 0 mm 7
Sept. 11 Mist
Mist
 30° /16° 0 mm 7
Sept. 12 Light rain
Light rain
 28° /16° 0.5 mm 6
Sept. 13 Mist
Mist
 26° /14° 0 mm 6
Sept. 14 Partly cloudy
Partly cloudy
 30° /17° 4.2 mm 7
Sept. 15 Sunny
Sunny
 33° /18° 0 mm 1.5
Sept. 16 Cloudy
Cloudy
 31° /18° 0 mm 1.5
Sept. 17 Partly cloudy
Partly cloudy
 27° /16° 0 mm 1.5
Sept. 18 Sunny
Sunny
 32° /18° 0 mm 1.5
Sept. 19 Sunny
Sunny
 33° /19° 0 mm 0
Sept. 20 Partly cloudy
Partly cloudy
 29° /18° 0 mm 6
Sept. 21 Patchy rain possible
Patchy rain possible
 31° /19° 0.2 mm 5
Sept. 22 Patchy rain possible
Patchy rain possible
 25° /18° 0.9 mm 5
Sept. 23 Patchy rain possible
Patchy rain possible
 33° /19° 1.4 mm 5
Sept. 24 Sunny
Sunny
 30° /18° 0 mm 6
Sept. 25 Sunny
Sunny
 32° /17° 0 mm 6
Sept. 26 Sunny
Sunny
 33° /18° 0 mm 7
Sept. 27 Sunny
Sunny
 32° /20° 0 mm 7
Sept. 28 Sunny
Sunny
 31° /18° 0 mm 6
Sept. 29 Mist
Mist
 24° /16° 5.8 mm 6
Sept. 30 Mist
Mist
 26° /15° 0 mm 6
Next
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?
In September, Indiana can expect light to moderate rainfall, totaling 31.4 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Indiana during September?
The average wind speed in Indiana during September is 15 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 💧

UV exposure in Indiana during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Counties in Indiana
Select a county for an accurate weather forecast
Allen CountyLaPorte CountyMarion CountyMonroe CountySaint Joseph CountyVanderburgh County
Top locations in Indiana
Select a location for an accurate weather forecast
BloomingtonEvansvilleFort WayneIndianapolisMichigan CitySouth Bend
More Locations

Quick links

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Location coordinates Where is Indiana?

Get accurate weather forecasts for Indiana, located at latitude 39.768 and longitude -86.158. Stay updated with localized weather information tailored for Indiana.

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