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

Visitors to Bloomington can expect significant temperature changes throughout the year. Average daytime temperatures reach a comfortable 29°C (84°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 3°C (37°F).

At night, temperatures range from around 18°C (64°F) in August to -7°C (19°F) in January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Bloomington is known for its substantial rain/snowfall, with annual precipitation reaching 1321 mm (52 in). Bloomington can be quite wet during June, receiving approximately 168 mm (6.6 in) of precipitation over 13 rainy days.

In contrast, during the driest month (August), you will experience much drier conditions, with 74 mm (2.9 in) of precipitation spread across 8 rainy days. For more details, please visit our Bloomington Precipitation page.

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

The average number of days each month with precipitation

Bloomington can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 9.9 hours of sunshine daily. In contrast, the city experiences much darker days in December, 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 Bloomington.

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