In September, Stockton typically sees daytime highs of 30.7°C and overnight lows around 13.0°C. Compared to the annual average high of 23.4°C, September runs +7.3°C.
September in Stockton averages a daytime high of 30.7°C and an overnight low of 13.0°C.
September runs +7.3°C compared to Stockton's annual average high of 23.4°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 30.7°C and cooler evenings around 13.0°C.