In October, Riverside typically sees daytime highs of 27.9°C and overnight lows around 10.7°C. Compared to the annual average high of 25.7°C, October runs +2.2°C.
October in Riverside averages a daytime high of 27.9°C and an overnight low of 10.7°C.
October runs +2.2°C compared to Riverside's annual average high of 25.7°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 27.9°C and cooler evenings around 10.7°C.