United StatesThe climate of Simi Valley
The current climate in Simi Valley features temperatures ranging from a high of 29°C to a low of 20°C throughout the year. The average yearly temperature is around 25°C. At night, temperatures in the colder months average around 9°C and in the warmer months around 18°C.
Average temperatures and precipitation
This chart shows the average monthly maximum and minimum temperatures (in degrees Celsius) and average monthly rainfall (in millimeters) for Simi Valley, California.
Temperature records
The highest temperature recorded in Simi Valley in recent years was 42°C in September 2020. The lowest daytime temperature recorded was 10°C in February 2023.
Rainfall amount
On average, Simi Valley receives 374 mm of precipitation each year. For comparison, New York gets 1142 mm of precipitation annually.
Best time to visit Simi Valley?
The best time to visit Simi Valley for sunny weather is January through December. During this period, you'll have nice temperatures and not too much rain, making it a great time to visit Simi Valley.
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Climate Table of Simi Valley
The climate table of Simi Valley shows the average temperatures, rainfall, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 21 | 20 | 21 | 23 | 23 | 26 | 28 | 29 | 29 | 27 | 24 | 20 |
| Temp. min (°C) | 10 | 9 | 10 | 12 | 14 | 16 | 19 | 19 | 18 | 15 | 11 | 9 |
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| Precipitation (mm) | 92 | 69 | 84 | 10 | 5,6 | 0,4 | 13 | 4,5 | 4,0 | 4,4 | 17 | 70 |
| UV Index | 4 | 6 | 7 | 8 | 7 | 9 | 8 | 7 | 7 | 6 | 5 | 4 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
Temperature charts
These charts display the average temperatures in Simi Valley, California. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Average Temperature per Month in Simi Valley
Yearly Temperature in Simi Valley
Precipitation charts
These charts show the average amount of precipitation in Simi Valley, California. Precipitation is always measured as water, even when it falls as snow or hail. The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Average Precipitation per Month in Simi Valley
Total Yearly Precipitation in Simi Valley
UV index chart
This chart shows the average UV index per month in Simi Valley, California. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Average UV Index per Month in Simi Valley
Weather experiences in Simi Valley
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Average weather in Simi Valley by month
Click on a month below to see detailed weather info for Simi Valley. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.