Summer temperatures · Indiana
How hot does Indianapolis get in summer?
Indianapolis right now
43°FScattered clouds
- Today46°F / 38°FClouds
- Tomorrow48°F / 34°FClouds
- Monday49°F / 34°FClear skies
Global boring, more like.
Live from OpenWeatherMap. Alerts from the National Weather Service.
In a typical summer, June to August, Indianapolis averages highs around 84°F and lows around 65°F.
About 20 days a year reach 90°F or hotter, and a day at 100°F comes along less than once a year. About 101 days a year get to 80°F or warmer. That makes it the 64th hottest summer of the 129 US cities we track.
Last updated
The hottest high in the forecast for the next 48 hours is about 48°F.
Indianapolis averages about 20 days a year at 90°F or hotter, and on those days the asphalt at the speedway takes the whole thing far too seriously.
Live 48-hour forecast from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Summer at a glance
| Average summer high | 84°F |
|---|---|
| Average summer low | 65°F |
| Days a year at 80°F or warmer | 101 |
| Days a year at 90°F or hotter | 20 |
| Days a year at 100°F or hotter | fewer than one |
| Average winter high, for comparison | 39°F |
Summer here is June to August. Counts are averages a year.
Cities with about the same summer
- Cincinnati, Ohio: highs around 85°F, lows around 64°F
- Dayton, Ohio: highs around 84°F, lows around 64°F
- Sacramento, California: highs around 91°F, lows around 58°F
More about the weather here
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00093819.