In September, Madison typically sees daytime highs of 22.4°C and overnight lows around 10.1°C. Compared to the annual average high of 13.2°C, September runs +9.2°C.
September in Madison averages a daytime high of 22.4°C and an overnight low of 10.1°C.
September runs +9.2°C compared to Madison's annual average high of 13.2°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 22.4°C and cooler evenings around 10.1°C.