March Weather in Walnut Creek, United States

Last updated: June 24, 2025

In March, the average temperature in Walnut Creek, United States hovers around 12°C (54°F), with a chilly minimum that can dip to -6°C (21°F) and a warm maximum reaching 31°C (88°F). Expect 72 mm (2.8 in) of precipitation over approximately 9 days, contributing to an average humidity of 81%. Prepare for a variety of weather conditions during this dynamic month!

March Temperature in Walnut Creek

In March in Walnut Creek, the average temperature is 12°C (54°F). Maximum temperatures can reach up to 31°C (88°F), while minimum temperatures can drop as low as -6°C (21°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 12°C (54°F), with highs reaching up to 31°C (88°F) and lows dropping to around -6°C (21°F).

Data source: Temperature data for Walnut Creek generated using information from the Copernicus Climate Change Service.

March Precipitation in Walnut Creek

In Walnut Creek in March, the precipitation amount is 72 mm (2.8 in) over the course of 9 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 72 mm (2.8 inches) of precipitation spread over approximately 9 days.

Data source: Precipitation data for March generated using information from the Copernicus Climate Change Service.

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Millimeters (mm) Inches (in)

March Humidity in Walnut Creek

In Walnut Creek in March humidity is 81%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket enveloping you, making travel sluggish and uncomfortable as you battle the stickiness while trying to enjoy your surroundings.

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 81%, offering insight into how humid the weather typically is during this month.

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 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the 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 8, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (45°F)	88 mm (3.5 inches)	85%	moderate
February Weather	10°C (51°F)	85 mm (3.3 inches)	82%	high
March Weather	12°C (54°F)	72 mm (2.8 inches)	81%	very high
April Weather	17°C (63°F)	104 mm (4.1 inches)	80%	very high
May Weather	22°C (71°F)	115 mm (4.5 inches)	81%	extreme
June Weather	25°C (77°F)	139 mm (5.5 inches)	81%	extreme
July Weather	27°C (81°F)	127 mm (5.0 inches)	81%	extreme
August Weather	26°C (79°F)	159 mm (6.3 inches)	80%	very high
September Weather	24°C (75°F)	148 mm (5.8 inches)	79%	very high
October Weather	19°C (67°F)	65 mm (2.5 inches)	80%	very high
November Weather	12°C (53°F)	88 mm (3.5 inches)	85%	moderate
December Weather	9°C (49°F)	107 mm (4.2 inches)	86%	moderate