What is the highest temperature ever recorded in Simi Valley, CA?

The record high temperature in Simi Valley, CA is 120°F, recorded on September 6, 2020.

What is the lowest temperature ever recorded in Simi Valley, CA?

The record low temperature in Simi Valley, CA is 18°F, recorded on February 6, 1989.

Historical Weather in Simi Valley, CA

Name: Simi Valley, CA Temperature Records
Creator: NOAA

See 55+ years of weather history for any date in Simi Valley going back to 1970.

Part of California weather history · California temperature records

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Today in Simi Valley Weather HistorySee records, averages, and 55+ years of data for today's date

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Monthly Climate Averages

Historical temperature and precipitation averages for Simi Valley, CA, based on 55+ years of weather data.

Warmest MonthAugustAvg High: 88°F / Low: 62°F

Coldest MonthDecemberAvg High: 64°F / Low: 48°F

Jan

65°/ 49°

Feb

64°/ 47°

Mar

68°/ 48°

Apr

70°/ 49°

May

76°/ 54°

Jun

80°/ 56°

Jul

87°/ 61°

Aug

88°/ 62°

Sep

85°/ 61°

Oct

79°/ 57°

Nov

71°/ 53°

Dec

64°/ 48°

Temperatures in Fahrenheit. Precipitation and snowfall in inches.

Simi Valley, CA Temperature Range by Month

Average monthly highs and lows. The shaded band shows the typical daily temperature range.

Avg high Avg low

Simi Valley, CA Daily Temperature Calendar

Average daily high temperature for every day of the year. Each cell is the climatological mean for that calendar day across 55 years of NOAA data.

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Best Time to Visit Simi Valley, CA

Most pleasant months in Simi Valley, CA: January, March, April, May, June, October, November.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Pleasant (65-82°F, ≤2.5" rain) Mild Less ideal

Simi Valley Temperature Records

Record High: The hottest temperature ever recorded in Simi Valley, CA is 120°F, set on September 6, 2020.
Record Low: The coldest temperature ever recorded in Simi Valley, CA is 18°F, set on February 6, 1989.
Data Coverage: Based on 32 years of data from NOAA weather station: CHEESEBORO CALIFORNIA.

All-Time Record High

120°F

September 6, 2020

All-Time Record Low

18°F

February 6, 1989

Monthly Temperature Records in Simi Valley

Month	Record High	Record Low
January	93°F(1975)	20°F(2007)
February	94°F(1986)	18°F(1989)
March	101°F(1988)	28°F(1976)
April	105°F(1989)	30°F(1999)
May	113°F(1984)	37°F(1974)
June	113°F(1990)	40°F(1971)
July	119°F(2006)	45°F(2018)
August	116°F(1985)	45°F(1995)
September	120°F(2020)	42°F(1971)
October	113°F(2024)	27°F(1971)
November	101°F(2006)	24°F(2004)
December	93°F(1975)	20°F(1990)