NOAA GHCND · LIVE

San Francisco, CA All-Time Weather Extremes

The most extreme temperature, precipitation, and snowfall ever recorded in San Francisco, from NOAA daily weather observations.

Station: SAN FRANCISCO DWTN
All-time weather extremes for San Francisco, CA, from NOAA daily observations at SAN FRANCISCO DWTN
Temperature
Record High105.9°F (41°C)September 1, 2017
Record Low26.9°F (-3°C)December 11, 1932
Lowest High35°F (2°C)December 11, 1932
Highest Low75°F (24°C)September 2, 2017
Highest Mean88.5°F (31°C)September 2, 2017
Lowest Mean30.9°F (-1°C)December 11, 1932
Precipitation
Max in One Calendar Day5.54" (140.7 mm)November 5, 1994
Max in One Month14.89" (378.2 mm)February 1998
Least in One Month0.00" (0.0 mm)July 1921
Max in One Year43.78" (1112.0 mm)1983
Least in One Year5.60" (142.3 mm)2013
Snowfall
Max in One Calendar Day0.8" (2.0 cm)December 11, 1932
Max in One Month0.8" (2.0 cm)December 1932
Max in One Season0.8" (2.0 cm)1932-33
Max in One Year0.8" (2.0 cm)1932
Earliest Snow0.8" (2.0 cm)December 11, 1932
Earliest Measurable Snow0.8" (2.0 cm)December 11, 1932
Latest Snow0.3" (0.8 cm)January 15, 1952
Latest Measurable Snow0.3" (0.8 cm)January 15, 1952
Period of Record
TemperatureJanuary 1, 1921 – February 6, 2025
PrecipitationJanuary 1, 1921 – February 6, 2025
SnowfallJanuary 1, 1921 – February 29, 2020

Note: Records compiled from NOAA GHCN-Daily observations at SAN FRANCISCO DWTN. Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.

Shareable Image Version

San Francisco, CA all-time weather extremes table — record high 105.9°F on September 1, 2017, record low 26.9°F on December 11, 1932, with precipitation and snowfall records from NOAA data

Frequently Asked Questions

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

The all-time record high in San Francisco, CA is 105.9°F (41°C), set on September 1, 2017.

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

The all-time record low in San Francisco, CA is 26.9°F (-3°C), set on December 11, 1932.

What is the most rain San Francisco, CA has ever had in one day?

The most precipitation recorded in one calendar day near San Francisco, CA is 5.54 inches, on November 5, 1994.

What is the biggest snowfall ever recorded in San Francisco, CA?

The most snow recorded in one calendar day near San Francisco, CA is 0.8 inches, on December 11, 1932.

Look Up Extremes by ZIP Code

See the all-time weather extremes for any US location

Weather Extremes in Other California Cities

📬 Free weekly newsletter

This week in weather history.

Five notable weather anniversaries from the week ahead — deadliest tornadoes, record temps, historic storms — every Sunday. No spam, unsubscribe anytime.

4,200+ readers · Sunday delivery