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March Weather in Santa Rosa, United States

Last updated: June 24, 2025

In March, the average temperature in Santa Rosa, United States hovers around 18°C (64°F), offering a comfortable climate. However, temperatures can vary significantly, dipping as low as 3°C (37°F) and soaring up to 34°C (93°F). Expect some light rain, with an average precipitation of 13 mm (0.5 in) spread over 2 days. With an average humidity of 67%, the atmosphere is pleasantly refreshing.

March Temperature in Santa Rosa

In March in Santa Rosa, the average temperature is a comfortable 18°C (64°F). Maximum temperatures can reach as high as 34°C (93°F), while the minimum can drop to 3°C (37°F). Be prepared for a range of temperatures while enjoying your travel experience!

March Weather in Santa Rosa: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Santa Rosa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Santa Rosa, March typically has an average temperature of 18°C (64°F), with highs reaching up to 34°C (93°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec555764737989919186756655
Data source: Temperature data for Santa Rosa 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 Santa Rosa

In Santa Rosa in March, the precipitation amount is 13 mm (0.5 in) over a span of 2 days.

March Precipitation Trends in Santa Rosa

The chart displays monthly precipitation patterns in Santa Rosa, 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 Santa Rosa, March typically receives around 13 mm (0.5 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec1818132173424157818
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Santa Rosa

In Santa Rosa in March humidity is 67%. With an average temperature of 18°C (64°F), this humidity feels like a warm embrace, making travel quite comfortable but slightly sticky, encouraging lightweight clothing and the occasional refreshing break in the shade.

March Average Humidity in Santa Rosa

This chart illustrates the average monthly humidity levels in Santa Rosa, 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 Santa Rosa is approximately 67%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%79%67%55%40%33%34%48%64%67%77%82%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Santa Rosa

In Santa Rosa 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 Santa Rosa.

Maximum UV Index Levels in Santa Rosa for March

The chart shows the monthly maximum UV Index (UVI) for Santa Rosa 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 Santa Rosa typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111212121110864
Data source: Santa Rosa 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 Santa Rosa Compares to Other Months

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

This table compares monthly weather conditions in Santa Rosa, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather13°C (55°F)18 mm (0.7 inches)76%moderate
February Weather14°C (58°F)18 mm (0.7 inches)79%high
March Weather18°C (64°F)13 mm (0.5 inches)67%very high
April Weather23°C (73°F)2 mm (0.1 inches)55%extreme
May Weather26°C (79°F)1 mm (0.0 inches)40%extreme
June Weather32°C (89°F)7 mm (0.3 inches)33%extreme
July Weather33°C (91°F)34 mm (1.3 inches)34%extreme
August Weather33°C (91°F)24 mm (0.9 inches)48%extreme
September Weather30°C (86°F)15 mm (0.6 inches)64%very high
October Weather24°C (76°F)7 mm (0.3 inches)67%very high
November Weather19°C (66°F)8 mm (0.3 inches)77%high
December Weather13°C (56°F)18 mm (0.7 inches)82%moderate

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