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March Weather in San Jose, United States

Last updated: June 24, 2025

In March, the average temperature in San Jose, United States hovers around 6°C (43°F). However, be prepared for a wide range of temperatures, with a minimum dipping to -17°C (1°F) and a maximum soaring to 26°C (78°F). During this month, expect 121 mm (4.8 in) of rainfall spread across 11 days, contributing to an average humidity of 84%.

March Temperature in San Jose

In March in San Jose, the average temperature is 6°C (43°F). Maximum temperatures can reach 26°C (78°F), while minimums can drop as low as -17°C (1°F). Travelers should come prepared for a wide range of temperatures, from chilly to quite warm.

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

The chart illustrates March temperature patterns in San Jose, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Jose, March typically has an average temperature of 6°C (43°F), with highs reaching up to 26°C (78°F) and lows dropping to around -17°C (1°F).
JanFebMarAprMayJunJulAugSepOctNovDec283143526574777470574135
Data source: Temperature data for San Jose 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 Jose

In San Jose in March, the total precipitation amount is 121 mm (4.8 in), which occurs over the course of 11 days.

March Precipitation Trends in San Jose

The chart displays monthly precipitation patterns in San Jose, 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 Jose, March typically receives around 121 mm (4.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec676912112115213111597651156453
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in San Jose

In San Jose in March, humidity is 84%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that penetrates your clothing, making outdoor excursions uncomfortable and prompting travelers to seek refuge indoors or find warm, sheltered spots to enjoy their surroundings.

March Average Humidity in San Jose

This chart illustrates the average monthly humidity levels in San Jose, 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 Jose is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%83%84%85%79%82%80%81%80%82%88%84%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in San Jose

In San Jose in March, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in San Jose.

Maximum UV Index Levels in San Jose for March

The chart shows the monthly maximum UV Index (UVI) for San Jose 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 Jose typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357810111098642
Data source: San Jose 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 Jose Compares to Other Months

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

This table compares monthly weather conditions in San Jose, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (28°F)67 mm (2.6 inches)82%moderate
February Weather-1°C (31°F)69 mm (2.7 inches)83%moderate
March Weather6°C (43°F)121 mm (4.8 inches)84%high
April Weather11°C (52°F)121 mm (4.8 inches)85%very high
May Weather18°C (65°F)152 mm (6.0 inches)79%very high
June Weather24°C (75°F)131 mm (5.2 inches)82%extreme
July Weather25°C (77°F)115 mm (4.5 inches)80%very high
August Weather23°C (74°F)97 mm (3.8 inches)81%very high
September Weather21°C (71°F)65 mm (2.6 inches)80%very high
October Weather14°C (57°F)115 mm (4.5 inches)82%high
November Weather5°C (41°F)64 mm (2.5 inches)88%moderate
December Weather2°C (36°F)53 mm (2.1 inches)84%low

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