In September, Bolingbrook typically sees daytime highs of 24.6°C and overnight lows around 12.0°C. Compared to the annual average high of 15.3°C, September runs +9.3°C.
September in Bolingbrook averages a daytime high of 24.6°C and an overnight low of 12.0°C.
September runs +9.3°C compared to Bolingbrook's annual average high of 15.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 24.6°C and cooler evenings around 12.0°C.