In September, Clinton typically sees daytime highs of 23.1°C and overnight lows around 11.4°C. Compared to the annual average high of 14.2°C, September runs +9.0°C.
September in Clinton averages a daytime high of 23.1°C and an overnight low of 11.4°C.
September runs +9.0°C compared to Clinton's annual average high of 14.2°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 23.1°C and cooler evenings around 11.4°C.