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.
Rainfall Throughout the Year
Planning a trip to Bloomington? Try our free trip weather planner