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March Weather in San Rafael, United States

Last updated: June 24, 2025

In March, the average temperature in San Rafael, United States hovers around 6°C (43°F), with a range that can dip to a chilling -13°C (9°F) or reach a warm 24°C (75°F). Expect some moisture in the air, as precipitation averages about 31 mm (1.2 in) over approximately 6 days. With an average humidity level of 71%, it’s essential to be prepared for a damp but invigorating atmosphere.

March Temperature in San Rafael

In March in San Rafael, the average temperature is 6°C (43°F). The maximum can reach 24°C (75°F), while the minimum can drop as low as -13°C (9°F). Be prepared for a wide range of temperatures and pack accordingly for your trip!

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

The chart illustrates March temperature patterns in San Rafael, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Rafael, March typically has an average temperature of 6°C (43°F), with highs reaching up to 24°C (75°F) and lows dropping to around -13°C (9°F).
JanFebMarAprMayJunJulAugSepOctNovDec293342516071727064524232
Data source: Temperature data for San Rafael 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 Rafael

In San Rafael in March, the precipitation amount is 31 mm (1.2 in) over a span of 6 days.

March Precipitation Trends in San Rafael

The chart displays monthly precipitation patterns in San Rafael, 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 Rafael, March typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec242332201612583632241421
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in San Rafael

In San Rafael in March humidity is 71%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that can make outdoor activities uncomfortable, compelling travelers to bundle up and seek warmth indoors.

March Average Humidity in San Rafael

This chart illustrates the average monthly humidity levels in San Rafael, 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 Rafael is approximately 71%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%83%71%61%48%36%37%46%62%74%82%82%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in San Rafael

In San Rafael in March, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in San Rafael.

Maximum UV Index Levels in San Rafael for March

The chart shows the monthly maximum UV Index (UVI) for San Rafael 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 Rafael typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111213131211864
Data source: San Rafael 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 Rafael Compares to Other Months

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

This table compares monthly weather conditions in San Rafael, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)24 mm (1.0 inches)81%moderate
February Weather1°C (34°F)23 mm (0.9 inches)83%high
March Weather6°C (43°F)31 mm (1.2 inches)71%very high
April Weather10°C (51°F)20 mm (0.8 inches)61%extreme
May Weather15°C (60°F)16 mm (0.6 inches)48%extreme
June Weather22°C (71°F)12 mm (0.5 inches)36%extreme
July Weather22°C (72°F)58 mm (2.3 inches)37%extreme
August Weather21°C (70°F)36 mm (1.4 inches)46%extreme
September Weather18°C (65°F)32 mm (1.3 inches)62%extreme
October Weather11°C (53°F)23 mm (0.9 inches)74%very high
November Weather6°C (42°F)14 mm (0.6 inches)82%high
December Weather0°C (32°F)21 mm (0.8 inches)82%moderate

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