In September, Bloomington typically sees daytime highs of 25.9°C and overnight lows around 12.3°C. Compared to the annual average high of 16.5°C, September runs +9.4°C.
September in Bloomington averages a daytime high of 25.9°C and an overnight low of 12.3°C.
September runs +9.4°C compared to Bloomington's annual average high of 16.5°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 25.9°C and cooler evenings around 12.3°C.