In September, Hesperia typically sees daytime highs of 30.1°C and overnight lows around 12.7°C. Compared to the annual average high of 22.5°C, September runs +7.6°C.
September in Hesperia averages a daytime high of 30.1°C and an overnight low of 12.7°C.
September runs +7.6°C compared to Hesperia's annual average high of 22.5°C, ranking #3 of 12 months by warmth.
Plan for daytime highs near 30.1°C and cooler evenings around 12.7°C.