Climate averages 1991–2020
Indianapolis weather
in July.
A hot, wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Indianapolis: daytime highs average 28.5°C and nights cool to about 19.5°C. By daytime temperature it is the warmest month of the year.
Expect about 90 mm of rain on roughly 12 days, which makes July a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 41 min on an average July day.
The nearest other city in this atlas is Carmel (24 km away). In July its highs average 28.1°C, about as warm as Indianapolis, with 87 mm of rain.
Among the 498 cities listed in the United States, Indianapolis ranks joint 332nd of 498 for the warmest July highs and joint 309th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Indianapolis is 1.7°C cooler than that mean.
From July to August, average highs fall by 0.6°C to 28.0°C, and monthly rainfall falls from 90 mm to 72 mm.
The annual picture
July in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Indianapolis climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.9°C-6.0°C | -6.0°C | 80 | 9.2 | 9.710 h |
| February | 4.4°C-4.5°C | -4.5°C | 66 | 8.6 | 10.711 h |
| March | 10.1°C0.4°C | 0.4°C | 97 | 11.1 | 11.912 h |
| April | 16.8°C6.5°C | 6.5°C | 120 | 12.0 | 13.213 h |
| May | 22.0°C12.4°C | 12.4°C | 122 | 13.4 | 14.314 h |
| June | 26.7°C17.5°C | 17.5°C | 107 | 11.8 | 14.915 h |
| July, selected | 28.5°C19.5°C | 19.5°C | 90 | 11.5 | 14.715 h |
| August | 28.0°C18.9°C | 18.9°C | 72 | 8.9 | 13.714 h |
| September | 24.6°C15.2°C | 15.2°C | 72 | 7.6 | 12.512 h |
| October | 17.7°C8.9°C | 8.9°C | 83 | 8.4 | 11.211 h |
| November | 10.2°C2.5°C | 2.5°C | 87 | 8.8 | 10.010 h |
| December | 4.2°C-2.9°C | -2.9°C | 78 | 9.9 | 9.49 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Carmel in JulyUnited States · 24 kmHigh 28.1°C · Low 19.2°C · 87 mm rain
- Fishers in JulyUnited States · 24 kmHigh 28.2°C · Low 19.1°C · 87 mm rain
- Bloomington (Indiana), United States in JulyUnited States · 74 kmHigh 29.3°C · Low 19.9°C · 88 mm rain
- Muncie in JulyUnited States · 81 kmHigh 27.7°C · Low 18.7°C · 86 mm rain
- Lafayette (Indiana), United States in JulyUnited States · 94 kmHigh 28.1°C · Low 19.0°C · 92 mm rain
- Cincinnati in JulyUnited States · 158 kmHigh 28.9°C · Low 19.5°C · 88 mm rain
- Dayton in JulyUnited States · 168 kmHigh 28.4°C · Low 19.5°C · 86 mm rain
- Louisville in JulyUnited States · 172 kmHigh 30.4°C · Low 20.8°C · 101 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Indianapolis) is explained once on the Indianapolis year overview and on the Sources, method and limits page.