Indianapolis (IN) Weather & Climate: Best Time to Visit

In Indianapolis, temperatures differ significantly between summer and winter months. Average maximum daytime temperatures range from a comfortable 29°C (84°F) in July, the warmest time of the year, to a chilly 2°C (36°F) during cooler months like January.

At night, you can expect temperatures ranging from 19°C (66°F) in July to around -7°C (19°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Indianapolis experiences significant rain/snowfall throughout the year, averaging 1202 mm (47 in) of precipitation annually. Significant seasonal changes in precipitation occur throughout the year. In the wettest month, June it receives high rainfall, averaging 157 mm (6.2 in) of precipitation, recorded across 15 rainy days. In contrast, the driest month February brings less snow/rainfall, with 69 mm (2.7 in) over 10 snowy/rainy days. For more details, please visit our Indianapolis Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Indianapolis. While July receives considerable daily sunshine with up to 9.9 hours, December marks the darkest time of the year, where sunshine is scarce with only 3.5 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Indianapolis.

The city experiences its highest humidity in December, reaching 78%. In April, the humidity drops to its lowest level at 66%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year