March Weather in California, United Kingdom

Last updated: August 27, 2025

In March, the average temperature in California, United Kingdom hovers around 6°C (43°F), with lows dipping to -5°C (24°F) and highs peaking at 17°C (63°F). Expect 92 mm (3.6 in) of precipitation spread over 16 days, contributing to an average humidity of a brisk 86%.

March Temperature in California

In March in California, the average temperature is 6°C (43°F). Maximums can reach 17°C (63°F), while minimums can dip as low as -5°C (24°F). Pack layers to stay comfortable and prepared for varying temperatures during your travels.

March Weather in California: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in California, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In California, March typically has an average temperature of 6°C (43°F), with highs reaching up to 17°C (63°F) and lows dropping to around -5°C (24°F).

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

March Precipitation in California

In California in March, the total precipitation amount reaches 92 mm (3.6 in) spread over 16 days.

March Precipitation Trends in California

The chart displays monthly precipitation patterns in California, 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 California, March typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 16 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 California

In California in March humidity is 86%. With an average temperature of 6°C (43°F), this humidity feels like a chilling blanket enveloping you, making outdoor exploration feel damp and uncomfortable.

March Average Humidity in California

This chart illustrates the average monthly humidity levels in California, 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 California is approximately 86%, 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 California

In California in March, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in California, you can check the information here.

Maximum UV Index Levels in California for March

The chart shows the monthly maximum UV Index (UVI) for California 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 California typically reaches 3, which falls under the moderate exposure category.

Data source: California 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 California Compares to Other Months

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

This table compares monthly weather conditions in California, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	4°C (40°F)	67 mm (2.7 inches)	90%	low
February Weather	5°C (41°F)	108 mm (4.2 inches)	88%	low
March Weather	6°C (43°F)	92 mm (3.6 inches)	86%	moderate
April Weather	8°C (46°F)	40 mm (1.6 inches)	85%	moderate
May Weather	11°C (52°F)	64 mm (2.5 inches)	80%	high
June Weather	14°C (57°F)	89 mm (3.5 inches)	83%	very high
July Weather	15°C (60°F)	82 mm (3.2 inches)	82%	high
August Weather	15°C (59°F)	106 mm (4.2 inches)	82%	high
September Weather	13°C (55°F)	74 mm (2.9 inches)	88%	moderate
October Weather	10°C (50°F)	107 mm (4.2 inches)	90%	moderate
November Weather	7°C (44°F)	83 mm (3.3 inches)	92%	low
December Weather	5°C (41°F)	93 mm (3.7 inches)	89%	low