In October, Simi Valley typically sees daytime highs of 24.6°C and overnight lows around 10.8°C. Compared to the annual average high of 22.3°C, October runs +2.3°C.
October in Simi Valley averages a daytime high of 24.6°C and an overnight low of 10.8°C.
October runs +2.3°C compared to Simi Valley's annual average high of 22.3°C, ranking #5 of 12 months by warmth.
Plan for daytime highs near 24.6°C and cooler evenings around 10.8°C.