In September, Waco typically sees daytime highs of 32.2°C and overnight lows around 19.4°C. Compared to the annual average high of 25.5°C, September runs +6.7°C.
September in Waco averages a daytime high of 32.2°C and an overnight low of 19.4°C.
September runs +6.7°C compared to Waco's annual average high of 25.5°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 32.2°C and cooler evenings around 19.4°C.