In September, Chico typically sees daytime highs of 32.1°C and overnight lows around 15.0°C. Compared to the annual average high of 24.0°C, September runs +8.1°C.
September in Chico averages a daytime high of 32.1°C and an overnight low of 15.0°C.
September runs +8.1°C compared to Chico's annual average high of 24.0°C, ranking #4 of 12 months by warmth.
Plan for daytime highs near 32.1°C and cooler evenings around 15.0°C.