Indianapolis, Indiana, United States climate
Average temperatures, precipitation and all-time records for Indianapolis, Indiana, United States, with every day graded against ~46 years of local climate history (1980–2026). Its warmest month is July, averaging a high of 85°F, and its coldest is January, with an average low of 22°F.
Indianapolis, colloquially known as Indy, is the capital and most populous city of the U.S. state of Indiana and the county seat of Marion County. Indianapolis is situated in the state's central till plain region along the west fork of the White River. via Wikipedia
Indianapolis average temperatures by month
Typical daily high and low, and average precipitation, for each month in Indianapolis, Indiana, United States, based on 1980–2026 records. The wettest month is April (0.20 in on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 36°F | 22°F | 0.10 in |
| February | 41°F | 26°F | 0.10 in |
| March | 52°F | 34°F | 0.10 in |
| April | 64°F | 44°F | 0.20 in |
| May | 73°F | 55°F | 0.20 in |
| June | 82°F | 65°F | 0.10 in |
| July | 85°F | 68°F | 0.10 in |
| August | 83°F | 66°F | 0.10 in |
| September | 78°F | 58°F | 0.10 in |
| October | 66°F | 46°F | 0.10 in |
| November | 52°F | 37°F | 0.10 in |
| December | 40°F | 27°F | 0.10 in |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -10°F to 115°F scale, so the whole year's rhythm reads at a glance.
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Record extremes
- Hottest day on record: 102°F on 1988-06-25
- Coldest day on record: -24°F on 1994-01-19
Percentiles compare each day to Indianapolis, Indiana, United States's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →