In September, Schaumburg typically sees daytime highs of 23.4°C and overnight lows around 11.3°C. Compared to the annual average high of 14.3°C, September runs +9.1°C.
September in Schaumburg averages a daytime high of 23.4°C and an overnight low of 11.3°C.
September runs +9.1°C compared to Schaumburg's annual average high of 14.3°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 23.4°C and cooler evenings around 11.3°C.