Weather in Indianapolis
What's the weather like in Indianapolis?
Indianapolis has a wide swing between hot summers and cold winters and moderate rainfall spread across the year. Average daytime highs range from 3°C (38°F) in January to 29°C (84°F) in July, with overnight lows around -5°C (23°F) and 20°C (67°F) respectively.
For comfortable sightseeing temperatures (18–26°C daytime highs), the best months to visit Indianapolis are May through June, and September through October.
Quick facts
- Country
- 🇺🇸 United States
- Region
- North America
- Time zone
- America/Indiana/Indianapolis
- Coordinates
- 39.768, -86.158
Monthly climate
Long-run averages for each month of the year.
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 3°C / 38°F | -5°C / 23°F | 82 mm | 10 | — |
| February | 6°C / 42°F | -4°C / 24°F | 86 mm | 10 | — |
| March | 11°C / 52°F | 1°C / 33°F | 127 mm | 12 | — |
| April | 17°C / 63°F | 6°C / 43°F | 107 mm | 12 | — |
| May | 23°C / 73°F | 13°C / 55°F | 124 mm | 14 | — |
| June | 28°C / 82°F | 18°C / 64°F | 102 mm | 12 | — |
| July | 29°C / 84°F | 20°C / 67°F | 115 mm | 13 | — |
| August | 28°C / 83°F | 19°C / 66°F | 89 mm | 11 | — |
| September | 26°C / 79°F | 16°C / 61°F | 72 mm | 8 | — |
| October | 19°C / 66°F | 10°C / 50°F | 87 mm | 11 | — |
| November | 11°C / 51°F | 2°C / 36°F | 76 mm | 8 | — |
| December | 7°C / 44°F | -1°C / 30°F | 85 mm | 10 | — |
Indianapolis by month
Detailed weather for any specific month:
Seasonal patterns to know
Atlantic hurricane season runs June–November (peak August–October). Tropical storms and hurricanes are possible — peak risk is August–October.
Cities with a similar climate to Indianapolis
Frequently asked questions
When is the best time to visit Indianapolis?
The most comfortable months in Indianapolis are usually May, September, October, when average highs sit near 18–26°C (64–79°F) with relatively little rain. See the full month-by-month breakdown for the exact figures.
What is the hottest month in Indianapolis?
July is typically the hottest month in Indianapolis, averaging a high of 29°C (84°F).
What is the coldest month in Indianapolis?
January is usually the coldest, with average lows around -5°C (23°F).
Does it snow in Indianapolis?
Snow is rare in Indianapolis; the climate data shows essentially no snowfall across the year.
Live forecast, sunrise/sunset, and more.