March weather forecastSan Francisco, CA
March
Weather in March
The first signs of spring appear in March, as San Francisco experiences a gradual increase in temperatures. While March breaks away from February's cooler temperatures, it retains an increased rainfall, registering 0.87in of precipitation compared between these two months. Flowers blossom and the city's parks come alive as longer daylight hours and increased sunshine hours signal the arrival of spring. Despite brief spells of rain, March sits at the threshold of the city’s dry season. The weather in April continues this warming trend, ushering in the vibrant hues of San Francisco spring.Temperature
March records an average high-temperature of a still refreshing 60.1°F (15.6°C), indicating a minor variation from the preceding month. San Francisco temperatures generally rest at a low of 46.9°F (8.3°C) during the March nights.Humidity
March is the most humid month in San Francisco, with an average relative humidity of 76%.Rainfall
In San Francisco, California, in March, during 9.3 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In San Francisco, during the entire year, the rain falls for 58.6 days and collects up to 6.46" (164mm) of precipitation.Ocean temperature
In San Francisco, the average seawater temperature in March is 54°F (12.2°C).Note: Swimming in 54°F (12.2°C) at temperatures under 50°F (10°C) requires thermal swimsuits; otherwise, one can face cold shock and breathing difficulty. Even brief immersion at 55.4°F (13°C) feels frosty.
Daylight
In March, the average length of the day is 11h and 59min.On the first day of the month, sunrise is at 6:39 am and sunset at 6:03 pm PST. On the last day of March, in San Francisco, sunrise is at 6:54 am and sunset at 7:32 pm PDT.
Note: On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, and the time zone changes from PST to PDT. Daylight Saving Time lasts until Sunday, November 3. 2024, at 2:00 am; consequently, the time zone reverts from PDT to PST.
Sunshine
In San Francisco, the average sunshine in March is 7.8h.UV index
In San Francisco, the average daily maximum UV index in March is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In March, a daily UV index of 4 turns into the following recommendations:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in March
San Francisco, CA
- Average high temperature in March: 60.1°F
The warmest month (with the highest average high temperature) is September (73.2°F).
The month with the lowest average high temperature is December (55.8°F).
- Average low temperature in March: 46.9°F
The month with the highest average low temperature is September (56.7°F).
The coldest months (with the lowest average low temperature) are January and December (45.9°F).
Average pressure in March
San Francisco, CA
- Average pressure in March: 30.07"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The months with the lowest atmospheric pressure are June, August and September (29.92"Hg).
Average wind speed in March
San Francisco, CA
- Average wind speed in March: 7.1mph
The windiest month (with the highest average wind speed) is May (7.6mph).
The calmest month (with the lowest average wind speed) is November (5.5mph).
Average humidity in March
San Francisco, CA
- Average humidity in March: 76%
The month with the highest relative humidity is March (76%).
The month with the lowest relative humidity is October (67%).
Average rainfall in March
San Francisco, CA
- Average rainfall in March: 0.87"
The wettest month (with the highest rainfall) is February (1.38").
The driest months (with the least rainfall) are July, August and September (0.08").
Average rainfall days in March
San Francisco, CA
- Average rainfall days in March: 9.3 days
The month with the highest number of rainy days is March (9.3 days).
The month with the least rainy days is June (1.9 days).
Average sea temperature in March
San Francisco, CA
- Average sea temperature in March: 53.8°F
The best month for swimming (with the highest average sea temperature) is September (57.3°F).
The coldest months (with the lowest average sea temperature) are April and June (53°F).
Average daylight in March /
Average sunshine in March
San Francisco, CA
- Average daylight in March: 12h and 0min
The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).
- Average sunshine in March: 7h and 48min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).
Average sunshine days in March
San Francisco, CA
- Average sunshine days in March: 20.8 days
The month with the most sunshine days is October (25.8 days).
The month with the least sunshine days is March (20.8 days).
Average UV index in March
San Francisco, CA
- Average UV index in March: 4
The months with the highest UV index are April, June, July, August and September (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in March
San Francisco, CA
- Average cloud cover in March: 36
The month with the most cloud cover is March (Cloud cover 36).
The months with the least cloud cover are July and September (Cloud cover 14).
Average visibility in March
San Francisco, CA
- Average visibility in March: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
