May Weather in California, Mexico

Last updated: August 27, 2025

In California, Mexico, the average temperature for May hovers around 22°C (71°F), with a minimum drop to 8°C (46°F) and a maximum rise to 34°C (94°F). Expect a precipitation amount of 30 mm (1.2 in) spread over 5 days, and enjoy a comfortable average humidity of 75% throughout the month.

May Temperature in California

In May in California, the average temperature is 22°C (71°F), with maximums reaching 34°C (94°F) and minimums dropping as low as 8°C (46°F). This pleasant climate makes California an ideal destination for outdoor activities and exploration during this time.

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

The chart illustrates May 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, May typically has an average temperature of 22°C (71°F), with highs reaching up to 34°C (94°F) and lows dropping to around 8°C (46°F).

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

May Precipitation in California

In California in May, the precipitation amount is 30 mm (1.2 in) over the course of 5 days.

May Precipitation Trends in California

The chart displays monthly precipitation patterns in California, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In California, May typically receives around 30 mm (1.2 inches) of precipitation spread over approximately 5 days.

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

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Millimeters (mm) Inches (in)

May Humidity in California

In California in May, humidity is 75%. With an average temperature of 22°C (71°F), this humidity feels like a warm embrace, making traveling a bit sticky but also invigorating, as the air surrounds you with a heavy yet refreshing sensation that highlights the vibrant atmosphere of your surroundings.

May Average Humidity in California

This chart illustrates the average monthly humidity levels in California, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in California is approximately 75%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in California

In California in May, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in California.

Maximum UV Index Levels in California for May

The chart shows the monthly maximum UV Index (UVI) for California in May, 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 May, the maximum UV index in California typically reaches 15, which falls under the extreme exposure category.

Data source: California May 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 May 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 May’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 May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	18 mm (0.7 inches)	75%	very high
February Weather	15°C (59°F)	11 mm (0.4 inches)	69%	extreme
March Weather	18°C (65°F)	10 mm (0.4 inches)	65%	extreme
April Weather	20°C (68°F)	6 mm (0.2 inches)	64%	extreme
May Weather	22°C (71°F)	30 mm (1.2 inches)	75%	extreme
June Weather	21°C (70°F)	116 mm (4.6 inches)	78%	extreme
July Weather	20°C (68°F)	137 mm (5.4 inches)	67%	extreme
August Weather	20°C (68°F)	79 mm (3.1 inches)	64%	extreme
September Weather	19°C (66°F)	135 mm (5.3 inches)	81%	extreme
October Weather	18°C (64°F)	48 mm (1.9 inches)	85%	extreme
November Weather	15°C (60°F)	14 mm (0.6 inches)	87%	very high
December Weather	13°C (55°F)	12 mm (0.5 inches)	87%	very high