What’s the climate like in Simi Valley?
The current climate of Simi Valley features average monthly temperatures ranging from highs of 29°C during the day to lows of 20°C. 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.
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.
On average, Simi Valley receives 374 mm of precipitation each year. For comparison, London gets 701 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 good temperatures and not too much rain, making it a great time to visit Simi Valley.
Climate Table of Simi Valley
The climate table of Simi Valley shows the average temperatures, precipitation, and UV index per month. The table gives an overview of the average day and night temperatures in degrees Celsius, the total amount of precipitation in millimetres, the total snowfall in centimetres, and the UV index for each month. Precipitation 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.
- Average yearly temperature: 25°C
- Highest temperature: 29°C in August and September
- Lowest temperature: 20°C in February and December
- Precipitation: 374 mm per year, averaging 31 mm per month
- Driest months: 0,4 mm in June, 4,0 mm in September and 4,4 mm in October
- Wettest months: 92 mm in January, 84 mm in March and 70 mm in December
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Table of Contents
Average Temperature per Month in Simi Valley
This graph shows the average maximum temperatures per month in Simi Valley, California. The temperatures are shown in degrees Celsius and the average is calculated based on the recorded temperatures per month from past years.
Average Precipitation per Month in Simi Valley
This graph shows how much precipitation Simi Valley, California, gets on average per month. Precipitation is always measured as water, even if it's snow or hail. This makes it easy to compare how much has fallen, regardless of the form of precipitation. The amount of precipitation is measured in millimetres and the average is calculated based on the recorded precipitation per month from past years.
Average UV Index per Month in Simi Valley
This graph 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.
Yearly Temperature in Simi Valley
This graph shows the average yearly temperature in Simi Valley, California. The yearly temperature, expressed in degrees Celsius, is the average of all twelve monthly temperatures summed up for that year.
Total Yearly Precipitation in Simi Valley
This chart shows the total yearly precipitation in Simi Valley, California, over the past few years. The total yearly precipitation, measured in millimetres, is the sum of all the rain that fell in the twelve months of that year.
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.
