Marion County (Indianapolis)
September
Weather in Marion County, Indiana for September 2027
Your guide to Marion County weather in September - trends and predictions
In general, the average temperature in Marion County at the beginning of September is 29.5 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.5 °C by the end of September.
Marion County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 155.7 mm.
Is September a good time to visit Marion County? check out the best time to travel to Marion County page.
✨ Is September a good time to visit Marion County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
27°/16°
Temperatures
14 km/h
Avg max wind
64 %
Avg humidity
Marion County Weather September
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Temperatures trend during September in Marion County
See the weather trend as well as the moving average line
September weather in Marion County 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° /17° | 0 mm | 8 | |
| Sept. 3 |  Cloudy | 31° /18° | 0 mm | 7 | |
| Sept. 4 |  Light rain | 31° /18° | 6.1 mm | 7 | |
| Sept. 5 |  Thundery outbreaks possible | 31° /19° | 0.1 mm | 7 | |
| Sept. 6 | Light rain | 27° /17° | 3.4 mm | 7 | |
| Sept. 7 | Sunny | 24° /13° | 0 mm | 6 | |
| Sept. 8 | Sunny | 26° /13° | 0 mm | 6 | |
| Sept. 9 |  Partly cloudy | 28° /15° | 0.5 mm | 7 | |
| Sept. 10 |  Patchy rain possible | 28° /16° | 1.5 mm | 6 | |
| Sept. 11 |  Mist | 30° /16° | 0.3 mm | 6 | |
| Sept. 12 |  Heavy rain | 27° /17° | 42.6 mm | 5 | |
| Sept. 13 | Mist | 26° /16° | 0.2 mm | 6 | |
| Sept. 14 | Light rain | 28° /16° | 3.1 mm | 7 | |
| Sept. 15 | Sunny | 31° /16° | 0.1 mm | 7 | |
| Sept. 16 | Light rain | 30° /18° | 3.9 mm | 6 | |
| Sept. 17 | Light rain | 28° /16° | 2.7 mm | 6 | |
| Sept. 18 | Light rain | 27° /16° | 2.7 mm | 6 | |
| Sept. 19 | Light rain | 28° /16° | 2.9 mm | 6 | |
| Sept. 20 | Patchy rain possible | 29° /17° | 1.4 mm | 5 | |
| Sept. 21 |  Moderate rain | 26° /17° | 24.9 mm | 5 | |
| Sept. 22 | Light rain | 25° /17° | 7.7 mm | 5 | |
| Sept. 23 | Moderate rain | 23° /16° | 18.1 mm | 5 | |
| Sept. 24 | Moderate rain | 22° /15° | 22.6 mm | 4 | |
| Sept. 25 | Patchy rain possible | 24° /16° | 1 mm | 6 | |
| Sept. 26 |  Overcast | 24° /13° | 0.8 mm | 5 | |
| Sept. 27 | Light rain | 25° /15° | 3.4 mm | 5 | |
| Sept. 28 | Light rain | 24° /15° | 2.7 mm | 5.9 | |
| Sept. 29 | Light rain | 26° /16° | 2.9 mm | 5.8 | |
| Sept. 30 | Mist | 27° /16° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Marion County 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 Marion County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Marion County in September - FAQ
What are the expected maximum and minimum temperatures in Marion County during September?
During September, expect a variety of temperatures with highs around 27° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in Marion County during September?
Significant rainfall exceeding 155.7 mm is expected in Marion County during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Marion County during September?
The average wind speed in Marion County during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Marion County
Explore the daily rainfall trends and prepare for Marion Countys September weather 💧
Typically, Marion County has 7 rainy days in September with a total of 155.7 mm of rainfall.
UV exposure in Marion County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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