What is the highest temperature ever recorded in San Mateo, CA?

The record high temperature in San Mateo, CA is 113°F, recorded on July 22, 2006.

What is the lowest temperature ever recorded in San Mateo, CA?

The record low temperature in San Mateo, CA is 19°F, recorded on December 22, 1990.

Historical Weather in San Mateo, CA

Name: San Mateo, CA Temperature Records
Creator: NOAA

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

Part of California weather history · California temperature records

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Today in San Mateo 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 San Mateo, CA, based on 55+ years of weather data.

Warmest MonthSeptemberAvg High: 75°F / Low: 55°F

Coldest MonthDecemberAvg High: 57°F / Low: 44°F

Jan

57°/ 43°

💧 9.9"

Feb

60°/ 45°

💧 8.9"

Mar

62°/ 47°

💧 7.4"

Apr

65°/ 48°

💧 5.5"

May

68°/ 51°

💧 3.1"

Jun

71°/ 53°

💧 3.0"

Jul

73°/ 55°

💧 2.9"

Aug

73°/ 56°

💧 3.0"

Sep

75°/ 55°

💧 2.9"

Oct

71°/ 53°

💧 7.9"

Nov

63°/ 48°

💧 8.6"

Dec

57°/ 44°

💧 9.4"

Temperatures in Fahrenheit. Precipitation and snowfall in inches.

San Mateo, CA Temperature Range by Month

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

Avg high Avg low

San Mateo, CA Monthly Precipitation

Average rainfall per month, in inches.

Rain (in)

San Mateo, 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.

Cooler

Hotter

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Best Time to Visit San Mateo, CA

San Mateo, CA has no months that meet our "pleasant" threshold — every season has tradeoffs.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

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

San Mateo Temperature Records

Record High: The hottest temperature ever recorded in San Mateo, CA is 113°F, set on July 22, 2006.
Record Low: The coldest temperature ever recorded in San Mateo, CA is 19°F, set on December 22, 1990.
Data Coverage: Based on 57 years of data from NOAA weather station: SAN FRANCISCO INTL AP.

All-Time Record High

113°F

July 22, 2006

All-Time Record Low

19°F

December 22, 1990

Monthly Temperature Records in San Mateo

Month	Record High	Record Low
January	80°F(2021)	24°F(1976)
February	82°F(2015)	22°F(2003)
March	89°F(2011)	28°F(2007)
April	102°F(2009)	31°F(2008)
May	103°F(2001)	33°F(2008)
June	111°F(2000)	36°F(2007)
July	113°F(2006)	40°F(1982)
August	109°F(1998)	41°F(1975)
September	113°F(2020)	32°F(2008)
October	109°F(2024)	33°F(1971)
November	88°F(1995)	29°F(1975)
December	76°F(2020)	19°F(1990)