San Francisco Weather in March

As San Francisco, California moves into spring weather during March, the rain eases and the skies clear. But the temperature nudges only slightly upwards.

This page gives detailed information on the typical March temperature, precipitation, sun, humidity, wind and storms for San Francisco. The temperature, rainfall, sunshine and wind speed numbers here are historical averages based on climate data gathered in downtown San Francisco near the corner of Buchanan and Hermann Streets. The other measurements are averages at San Francisco International Airport, located south of the city center.

Temperature Weather iconTemperature

62 °F March average high 17 °C
49 °F March average low 9 °C
20 days 60 °F max. or more (16 °C)
20 days 50 °F min. or less (10 °C)

Usually every day during March the temperature rises to over 50 degrees Fahrenheit (10 degrees Celsius) in San Francisco. The city averages 5 days this month when the thermometer reaches into the 70s °F (over 21 °C). Temperatures above 80 °F (27 °C) are uncommon during March.

The thermometer dips to 40 °F (4 °C) or below during March on an average of once every five years.

Rainy Weather iconRain

3.2 in total precipitation 80 mm
11 days of rain

Half the time, San Francisco receives 1.3 to 4.5 inches (34 to 115 mm) of rainfall in March. One in four years has drier weather, while another one in four is wetter.

Sunny Weather iconSun

69 % sunshine
10 days clear skies

The sun's rays reach the ground in San Francisco during 69 percent of daylight hours on average in March, for a total of 257 hours in the month. Typically on 10 days this month the sky is mainly clear, with at most 30 percent cloud cover.

Sunlight in March at San Francisco lasts for 11 hours and 59 minutes a day on average. The shortest day of the month is the 1st with 11 hours and 23 minutes of daylight. By the end of the month, the days have lengthened to 12:36 from sunrise to sunset. These durations can vary by a minute or two from year to year.

Humid Weather iconHumidity

73 % March average humidity

The relative humidity in San Francisco during March usually peaks at 82 percent in the morning then drops to 62 percent by early afternoon.

Local Time1 am4 am7 am10 am1 pm4 pm7 pm10 pm
Humidity % 80 81 82 70 62 63 72 77

Windy Weather iconWind

8.5 mph March wind speed average 13.7 kph

March is a little less windy than most other months in San Francisco.

Stormy Weather iconStorms

2 days rainfall of 0.5 inches (13 mm) or more
0 days with thunderstorms in March

Every few years a thunderstorm shows up at San Francisco in March.


The weather data here are long-term averages provided by the US National Centers for Environmental Information (NCEI). Temperature and precipitation are 1991-2020 normals while humidity and thunderstorms are 1961-1990 normals.

San Francisco Weather
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