October Weather in California, Mexico

Last updated: August 27, 2025

In October, the average temperature in California, Mexico hovers around 18°C (64°F), with minimums dipping to 5°C (41°F) and maximums reaching up to 29°C (84°F). Expect about 48 mm (1.9 in) of precipitation spread over 8 days, contributing to an average humidity of 85%. Prepare for a mild yet moist atmosphere during your visit!

October Temperature in California

In October in California, the average temperature is 18°C (64°F), with maximums reaching up to 29°C (84°F) and minimums dropping as low as 5°C (41°F). It's a great time to visit if you enjoy mild weather with the occasional warm day.

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

The chart illustrates October 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, October typically has an average temperature of 18°C (64°F), with highs reaching up to 29°C (84°F) and lows dropping to around 5°C (41°F).

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

October Precipitation in California

In California in October, the precipitation amount is 48 mm (1.9 in) over a span of 8 days.

October Precipitation Trends in California

The chart displays monthly precipitation patterns in California, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In California, October typically receives around 48 mm (1.9 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

October Humidity in California

In California in October, humidity is 85%. With an average temperature of 18°C (64°F), this humidity feels like a muggy blanket enveloping you, making travel a bit heavy and sticky, as the air clings to your skin and every step can feel like wading through molasses.

October Average Humidity in California

This chart illustrates the average monthly humidity levels in California, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in California is approximately 85%, offering insight into how humid the weather typically is during this month.

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

October UV Index in California

In California in October, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in California.

Maximum UV Index Levels in California for October

The chart shows the monthly maximum UV Index (UVI) for California in October, 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 October, the maximum UV index in California typically reaches 12, which falls under the extreme exposure category.

Data source: California October 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 October 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 October’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 October’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