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March Weather in San Francisco, El Salvador

Last updated: August 23, 2025

In San Francisco, El Salvador, the average temperature in March reaches a warm 28°C (83°F), with a minimum of 18°C (64°F) and a maximum of 37°C (99°F). Rainfall is light, with only 6 mm (0.2 in) of precipitation over 0 days. The air is comfortably humid, averaging 59% humidity, making it a delightful time to enjoy the outdoors!

March Temperature in San Francisco

In March in San Francisco, the average temperature is 28°C (83°F), with maximums reaching up to 37°C (99°F) and minimums dropping as low as 18°C (64°F). This makes it an ideal time for travelers seeking warm weather and plenty of sunshine.

March Weather in San Francisco: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in San Francisco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Francisco, March typically has an average temperature of 28°C (83°F), with highs reaching up to 37°C (99°F) and lows dropping to around 18°C (64°F).
JanFebMarAprMayJunJulAugSepOctNovDec788082828079818078777777
Data source: Temperature data for San Francisco generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

March Precipitation in San Francisco

In San Francisco in March, the total precipitation amount is 6 mm (0.2 in), spread over a duration of 0 days.

March Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In San Francisco, March typically receives around 6 mm (0.2 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec2265533226797234295335644
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in San Francisco

In San Francisco in March humidity is 59%. With an average temperature of 28°C (83°F), this humidity feels like a warm embrace, making traveling a little sticky but overall comfortable as long as you stay hydrated and take breaks in the shade.

March Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in San Francisco is approximately 59%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec63%62%59%59%59%68%78%79%77%77%75%67%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in San Francisco

In San Francisco in March, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Francisco, you can check here.

Maximum UV Index Levels in San Francisco for March

The chart shows the monthly maximum UV Index (UVI) for San Francisco in March, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In March, the maximum UV index in San Francisco typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec11121414141413131313109
Data source: San Francisco March UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How March Weather in San Francisco Compares to Other Months

Weather in San Francisco varies notably across the year, with each month offering distinct climate conditions. This page compares March’s weather to other months in San Francisco, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in San Francisco, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather26°C (78°F)2 mm (0.1 inches)63%extreme
February Weather27°C (80°F)2 mm (0.1 inches)62%extreme
March Weather28°C (83°F)6 mm (0.2 inches)59%extreme
April Weather28°C (83°F)55 mm (2.2 inches)59%extreme
May Weather27°C (80°F)332 mm (13.1 inches)59%extreme
June Weather26°C (79°F)267 mm (10.5 inches)68%extreme
July Weather27°C (81°F)97 mm (3.8 inches)77%extreme
August Weather26°C (80°F)234 mm (9.2 inches)79%extreme
September Weather26°C (78°F)295 mm (11.6 inches)77%extreme
October Weather25°C (77°F)335 mm (13.2 inches)77%extreme
November Weather25°C (77°F)64 mm (2.5 inches)75%very high
December Weather25°C (77°F)4 mm (0.2 inches)66%very high

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