Simi Valley (CA) Weather and Climate: A Comprehensive Guide
The temperature in Simi Valley can vary greatly throughout the year.
The temperatures shift from very warm
to mild.
The city tends toward drier weather patterns.
Let's now guide you through the climate details for a complete overview.
Average maximum day and minimum night temperature
Depending on the time of the year, temperatures range from very warm to moderate in Simi Valley. Average daytime temperatures reach a very warm 31°C in August. In December, the coolest month of the year, temperatures drop to a moderate 18°C.
At night, you can expect cooler temperatures, with averages dropping to around 7°C during this month. Check out our detailed temperature page for more information.Temperature ranges by month
Precipitation and rainy days
With annual rainfall averaging 280 mm, Simi Valley maintains relatively low precipitation levels throughout the seasons. Simi Valley can be quite wet during January, receiving approximately 62 mm of precipitation over 5 rainy days. In contrast August, experiences much drier conditions, with 0.1 mm of rainfall, spread across 0 rainy days. For more details, please visit our Simi Valley Precipitation page.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Simi Valley can be enjoyed more throughout the sunniest month of July under a blue sky, with approximately 12.1 hours of sunshine daily. In contrast, the city experiences much darker days in November, with only 7.2 hours of sunlight per day. Visit our detailed sunshine hours page for more information.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Simi Valley.
The city experiences its highest humidity in May, reaching 73%. In November, the humidity drops to its lowest level at 50%. Explore our detailed page on humidity levels for further details.
Relative humidity over the year
partly cloudy and no rain broken clouds and no rain clear and no rainForecast for Simi Valley (CA)
2 m/s
2 m/s
2 m/s
The best time of year to visit Simi Valley in the United States of America
During the months of March, April, May and November you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.Other facts from our historical weather data:
August has an average maximum temperature of 31°C and is the warmest month of the year.
The coldest month is December with an average maximum temperature of 18°C.
January tops the wettest month list with 62 mm of rainfall.
August is the driest month with 0 mm of precipitation.
July is the sunniest month with an average of 364 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
