In September, Porterville typically sees daytime highs of 33.4°C and overnight lows around 14.7°C. Compared to the annual average high of 25.3°C, September runs +8.1°C.
September in Porterville averages a daytime high of 33.4°C and an overnight low of 14.7°C.
September runs +8.1°C compared to Porterville's annual average high of 25.3°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 33.4°C and cooler evenings around 14.7°C.