In January, Simi Valley typically sees daytime highs of 16.0°C and overnight lows around 4.7°C. Compared to the annual average high of 22.3°C, January runs -6.3°C.
January in Simi Valley averages a daytime high of 16.0°C and an overnight low of 4.7°C.
January runs -6.3°C compared to Simi Valley's annual average high of 22.3°C, ranking #12 of 12 months by warmth.
Plan for daytime highs near 16.0°C and cooler evenings around 4.7°C.