In April, Simi Valley typically sees daytime highs of 20.0°C and overnight lows around 7.5°C. Compared to the annual average high of 22.3°C, April runs -2.3°C.
April in Simi Valley averages a daytime high of 20.0°C and an overnight low of 7.5°C.
April runs -2.3°C compared to Simi Valley's annual average high of 22.3°C, ranking #8 of 12 months by warmth.
Plan for daytime highs near 20.0°C and cooler evenings around 7.5°C.