In August, Riverside typically sees daytime highs of 33.9°C and overnight lows around 16.5°C. Compared to the annual average high of 25.7°C, August runs +8.3°C.
August in Riverside averages a daytime high of 33.9°C and an overnight low of 16.5°C.
August runs +8.3°C compared to Riverside's annual average high of 25.7°C, ranking #2 of 12 months by warmth.
Plan for daytime highs near 33.9°C and cooler evenings around 16.5°C.