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March Weather in Walnut Creek, United States

Last updated: June 24, 2025

In Walnut Creek, United States, the average temperature for March hovers around 5°C (42°F). While you might experience a brisk minimum of -15°C (6°F), there’s also the potential for pleasantly warm days reaching up to 24°C (75°F). Be prepared for about 103 mm (4.1 in) of precipitation spread over 13 days, and keep in mind the high average humidity of 87%, which adds to the chill in the air. Enjoy your weather-wise adventure!

March Temperature in Walnut Creek

In March in Walnut Creek, the average temperature is 5°C (42°F). Maximums can reach 24°C (75°F), while minimums can drop as low as -15°C (6°F). Be prepared for a wide range of temperatures when traveling during this time.

March Weather in Walnut Creek: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Walnut Creek, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Walnut Creek, March typically has an average temperature of 5°C (42°F), with highs reaching up to 24°C (75°F) and lows dropping to around -15°C (6°F).
JanFebMarAprMayJunJulAugSepOctNovDec303441516371757368574236
Data source: Temperature data for Walnut Creek 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 Walnut Creek

In Walnut Creek in March, the precipitation amount is 103 mm (4.1 in) spread over a duration of 13 days.

March Precipitation Trends in Walnut Creek

The chart displays monthly precipitation patterns in Walnut Creek, 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 Walnut Creek, March typically receives around 103 mm (4.1 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec89106103129123126119861051099495
Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.
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March Humidity in Walnut Creek

In Walnut Creek in March humidity is 87%. With an average temperature of 5°C (42°F), this humidity feels like a damp chill that seeps into your bones, making outdoor activities less enjoyable and travel less inviting as the air becomes heavy and oppressive.

March Average Humidity in Walnut Creek

This chart illustrates the average monthly humidity levels in Walnut Creek, 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 Walnut Creek is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%87%81%83%82%76%77%82%89%86%
Data source: Humidity data for March generated using information from the Copernicus Climate Change Service.

March UV Index in Walnut Creek

In Walnut Creek in March, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Walnut Creek, you can refer to this Hourly UV Index in Walnut Creek.

Maximum UV Index Levels in Walnut Creek for March

The chart shows the monthly maximum UV Index (UVI) for Walnut Creek 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 Walnut Creek typically reaches 6, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Walnut Creek 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 Walnut Creek Compares to Other Months

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

This table compares monthly weather conditions in Walnut Creek, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (31°F)88 mm (3.5 inches)88%moderate
February Weather1°C (34°F)106 mm (4.2 inches)88%moderate
March Weather5°C (42°F)103 mm (4.1 inches)87%high
April Weather11°C (51°F)129 mm (5.1 inches)87%very high
May Weather17°C (63°F)122 mm (4.8 inches)81%very high
June Weather22°C (71°F)126 mm (5.0 inches)83%very high
July Weather24°C (76°F)118 mm (4.7 inches)82%very high
August Weather23°C (73°F)86 mm (3.4 inches)76%very high
September Weather20°C (68°F)105 mm (4.2 inches)77%very high
October Weather14°C (57°F)109 mm (4.3 inches)82%high
November Weather5°C (42°F)94 mm (3.7 inches)89%moderate
December Weather2°C (36°F)95 mm (3.8 inches)86%low

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