Typical Weather in Bloomington, IL in September

79° F Avg High

54° F Avg Low

5 Rainy Days

☀️ Temperature Summary

September is a popular time to visit, with an inviting climate featuring warm temperatures. September is one of the warmer months of the year for Bloomington, with highs averaging around 79°F. You can expect overnight lows near 54°F most days. Temperatures will usually fall as the month goes on, with daily high temperatures ranging between 82°F and 72°F.

September is a great time to visit Bloomington, with mild temperatures and sunny days being very common.

High Temps Throughout the Year

☔ Rain Summary

In September you can expect close to a 17% chance of rain for any given day. It rains less than usual in September, with total rainfall for the month typically near 3 inches.