June Weather in California, United States

Last updated: June 24, 2025

In June, the average temperature in California, United States is a comfortable 21°C (70°F). However, temperatures can range from a chilly 7°C (45°F) to a hot 32°C (90°F). Expect about 172 mm (6.8 in) of precipitation over 17 days, contributing to an average humidity of 84%.

June Temperature in California

In June, in California, the average temperature is 21°C (70°F). Maximum temperatures can reach up to 32°C (90°F), while lows can drop to around 7°C (45°F). This variation makes it an ideal time for travelers who enjoy a mix of warm days and cooler evenings.

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

The chart illustrates June 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, June typically has an average temperature of 21°C (70°F), with highs reaching up to 32°C (90°F) and lows dropping to around 7°C (45°F).

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

June Precipitation in California

In California, in June, the precipitation amount is 172 mm (6.8 in) spread over 17 days.

June Precipitation Trends in California

The chart displays monthly precipitation patterns in California, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In California, June typically receives around 172 mm (6.8 inches) of precipitation spread over approximately 17 days.

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

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Millimeters (mm) Inches (in)

June Humidity in California

In California in June, humidity is 84%. With an average temperature of 21°C (70°F), this humidity feels like thick, warm air wrapping around you, making outdoor activities quite uncomfortable and necessitating frequent hydration breaks for a more enjoyable travel experience.

June Average Humidity in California

This chart illustrates the average monthly humidity levels in California, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in California is approximately 84%, offering insight into how humid the weather typically is during this month.

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

June UV Index in California

In California in June, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in California.

Maximum UV Index Levels in California for June

The chart shows the monthly maximum UV Index (UVI) for California in June, 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 June, the maximum UV index in California typically reaches 10, which falls under the very high exposure category.

Data source: California June 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 June 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 June’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 June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	0°C (33°F)	87 mm (3.4 inches)	88%	moderate
February Weather	2°C (37°F)	124 mm (4.9 inches)	88%	moderate
March Weather	6°C (43°F)	117 mm (4.6 inches)	88%	high
April Weather	11°C (53°F)	129 mm (5.1 inches)	86%	very high
May Weather	17°C (63°F)	149 mm (5.9 inches)	82%	very high
June Weather	21°C (70°F)	172 mm (6.8 inches)	84%	very high
July Weather	24°C (75°F)	153 mm (6.0 inches)	82%	very high
August Weather	23°C (73°F)	110 mm (4.3 inches)	73%	very high
September Weather	20°C (68°F)	125 mm (4.9 inches)	73%	very high
October Weather	14°C (58°F)	121 mm (4.8 inches)	81%	high
November Weather	6°C (43°F)	86 mm (3.4 inches)	89%	moderate
December Weather	3°C (38°F)	116 mm (4.6 inches)	86%	moderate