In July, Simi Valley typically sees daytime highs of 29.3°C and overnight lows around 15.6°C. Compared to the annual average high of 22.3°C, July runs +7.0°C.
July in Simi Valley averages a daytime high of 29.3°C and an overnight low of 15.6°C.
July runs +7.0°C compared to Simi Valley's annual average high of 22.3°C, ranking #1 of 12 months by warmth.
Plan for daytime highs near 29.3°C and cooler evenings around 15.6°C.