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

The record high temperature in San Francisco, CA is 109°F, recorded on September 14, 1971.

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

The record low temperature in San Francisco, CA is 23°F, recorded on December 6, 2017.

Historical Weather in San Francisco, CA

Name: San Francisco, CA Temperature Records
Creator: NOAA

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

Part of California weather history · California temperature records

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

Warmest MonthOctoberAvg High: 69°F / Low: 54°F

Coldest MonthDecemberAvg High: 58°F / Low: 46°F

Jan

58°/ 46°

💧 9.8"

Feb

60°/ 47°

💧 9.4"

Mar

62°/ 48°

💧 7.9"

Apr

63°/ 49°

💧 5.5"

May

64°/ 51°

💧 4.2"

Jun

66°/ 53°

💧 3.5"

Jul

66°/ 54°

💧 1.6"

Aug

67°/ 56°

💧 1.8"

Sep

69°/ 56°

💧 3.2"

Oct

69°/ 54°

💧 7.2"

Nov

63°/ 50°

💧 9.0"

Dec

58°/ 46°

💧 9.4"

Temperatures in Fahrenheit. Precipitation and snowfall in inches.

San Francisco, CA Temperature Range by Month

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

Avg high Avg low

San Francisco, CA Monthly Precipitation

Average rainfall per month, in inches.

Rain (in)

San Francisco, 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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20°40°60°80°100°

Best Time to Visit San Francisco, CA

Most pleasant months in San Francisco, CA: July, August.

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

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

San Francisco Temperature Records

Record High: The hottest temperature ever recorded in San Francisco, CA is 109°F, set on September 14, 1971.
Record Low: The coldest temperature ever recorded in San Francisco, CA is 23°F, set on December 6, 2017.
Data Coverage: Based on 57 years of data from NOAA weather station: SAN FRANCISCO DWTN.

All-Time Record High

109°F

September 14, 1971

All-Time Record Low

23°F

December 6, 2017

Monthly Temperature Records in San Francisco

Month	Record High	Record Low
January	79°F(2021)	27°F(1982)
February	82°F(2016)	29°F(1976)
March	88°F(2005)	25°F(2023)
April	97°F(1981)	27°F(2018)
May	105°F(1976)	35°F(2017)
June	107°F(1973)	37°F(2011)
July	103°F(1972)	40°F(2021)
August	103°F(2010)	40°F(2018)
September	109°F(1971)	38°F(2021)
October	103°F(1980)	35°F(2020)
November	90°F(2019)	26°F(1982)
December	76°F(1979)	23°F(2017)