What is the highest temperature ever recorded in Costa Mesa, CA?

The record high temperature in Costa Mesa, CA is 115°F, recorded on July 6, 2018.

What is the lowest temperature ever recorded in Costa Mesa, CA?

The record low temperature in Costa Mesa, CA is 16°F, recorded on January 12, 1989.

Historical Weather in Costa Mesa, CA

Name: Costa Mesa, CA Temperature Records
Creator: NOAA

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

Part of California weather history · California temperature records

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Today in Costa Mesa 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 Costa Mesa, CA, based on 55+ years of weather data.

Warmest MonthAugustAvg High: 84°F / Low: 65°F

Coldest MonthDecemberAvg High: 68°F / Low: 47°F

Jan

69°/ 47°

💧 10.3"

Feb

69°/ 48°

💧 10.8"

Mar

70°/ 51°

💧 8.7"

Apr

73°/ 53°

💧 5.5"

May

74°/ 57°

💧 3.6"

Jun

78°/ 61°

💧 2.4"

Jul

82°/ 64°

💧 1.8"

Aug

84°/ 65°

💧 7.0"

Sep

83°/ 63°

💧 5.6"

Oct

79°/ 58°

💧 5.1"

Nov

74°/ 51°

💧 7.3"

Dec

68°/ 47°

💧 8.9"

Temperatures in Fahrenheit. Precipitation and snowfall in inches.

Costa Mesa, CA Temperature Range by Month

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

Avg high Avg low

Costa Mesa, CA Monthly Precipitation

Average rainfall per month, in inches.

Rain (in)

Costa Mesa, 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 Costa Mesa, CA

Most pleasant months in Costa Mesa, CA: June, July.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

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

Costa Mesa Temperature Records

Record High: The hottest temperature ever recorded in Costa Mesa, CA is 115°F, set on July 6, 2018.
Record Low: The coldest temperature ever recorded in Costa Mesa, CA is 16°F, set on January 12, 1989.
Data Coverage: Based on 28 years of data from NOAA weather station: SANTA ANA JOHN WAYNE AP.

All-Time Record High

115°F

July 6, 2018

All-Time Record Low

16°F

January 12, 1989

Monthly Temperature Records in Costa Mesa

Month	Record High	Record Low
January	96°F(2003)	16°F(1989)
February	97°F(2016)	22°F(1989)
March	98°F(2015)	31°F(2023)
April	106°F(2004)	34°F(1975)
May	106°F(2004)	39°F(2000)
June	110°F(2016)	45°F(2011)
July	115°F(2018)	50°F(2012)
August	107°F(2020)	50°F(2010)
September	113°F(2010)	42°F(2006)
October	107°F(1991)	32°F(1971)
November	102°F(2010)	33°F(1994)
December	92°F(1979)	24°F(1988)