The climate in Simi Valley, CA is generally mild and sunny with hot summers and cool winters. The average annual temperature is around 60 F (16 C) making it suitable for most outdoor activities year-round. During the summer months, temperatures can reach into the 90s F (32 C). Winters are usually mild with occasional rain showers and temperatures dipping into the 30s F (-1 C). There is very little snowfall in Simi Valley due to its proximity to the Pacific Ocean which keeps it mild during those colder months.
Simi Valley, California gets 17 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Simi Valley averages 0 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 277 sunny days per year in Simi Valley. The US average is 205 sunny days.
Simi Valley gets some kind of precipitation, on average, 35 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 92 degrees
Winter Low: the January low is 42
Rain: averages 17 inches of rain a year
Snow: averages 0 inches of snow a year