United States of America
Indianapolis sees feels-like daytime highs peak around 35.1°C in July and nighttime lows bottom out near -5.8°C in January. May is the wettest month (~108 mm), while February is the driest (~44 mm). For sunshine, August leads with about 69% clear skies.
Based on mild feels-like temperatures and low rain chances, the most comfortable months are May, September, and October — expect around 16–26.3°C with roughly 40% chance of rain on a given day in May.
| Month | Low / High °C | Rain % | Rainfall | Clear skies | Wind |
|---|---|---|---|---|---|
| January | -5.8° / 0.4° | 14% | 48 mm | 42% | 17.9 kph |
| February | -4.1° / 3.5° | 15% | 44 mm | 42% | 17.9 kph |
| March | 2.1° / 10.4° | 25% | 71 mm | 47% | 18.1 kph |
| April | 8.7° / 18.9° | 35% | 95 mm | 50% | 17.4 kph |
| May☀ | 16° / 26.3° | 40% | 108 mm | 50% | 14.9 kph |
| June | 22.3° / 33.3° | 41% | 104 mm | 56% | 12.6 kph |
| July | 25° / 35.1° | 40% | 93 mm | 64% | 10.9 kph |
| August | 23.2° / 33.1° | 34% | 79 mm | 69% | 10.9 kph |
| September☀ | 17.2° / 28.2° | 27% | 73 mm | 68% | 12.5 kph |
| October☀ | 9.7° / 19.1° | 25% | 76 mm | 61% | 14.8 kph |
| November | 3.1° / 10.4° | 24% | 75 mm | 50% | 16.4 kph |
| December | -3.2° / 3.5° | 20% | 66 mm | 43% | 17.2 kph |
Feels-like temperatures from long-term historical data; ☀ marks the most comfortable months (mild temperatures, low rain).
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