September weather in Indianapolis, United States
Averages from 150 days in September across 2020–2024.
Typical conditions
| Average high | 25.8°C |
|---|---|
| Average low | 15.2°C |
| Average mean | 20.2°C |
| Total precipitation | 310.4 mm |
| Rainy days | 62 |
| Average precipitation hours | 2.8 h |
| Average max wind speed | 15.8 km/h |
| Average sunshine | 10.2 h/day |
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