Simi Valley in August

Average high

34.2°C

Average low

18.1°C

Rainfall

—

— wet days

Comfort score

out of 100

August in Simi Valley averages a daily high of 34.2°C with nights around 18.1°C. Generally workable, with some weather to plan around.

Across the year, the best time to visit Simi Valley is October–May.

Based on CHEESEBORO CALIFORNIA, CA US (11.1km), 1995–2024. 28 years of August data.