January Weather in San Bernardino, Mexico

Last updated: August 27, 2025

In San Bernardino, Mexico, the average temperature in January is a comfortable 25°C (78°F). Temperatures can range from a minimum of 18°C (65°F) to a maximum of 31°C (89°F). Expect 11 mm (0.4 in) of precipitation over approximately 2 days, accompanied by an average humidity of 67%. It's the perfect time to enjoy the mild climate!

January Temperature in San Bernardino

In January in San Bernardino, the average temperature is 25°C (78°F). Maximums can reach 31°C (89°F) and minimums can be as low as 18°C (65°F). This makes San Bernardino an ideal destination for travelers looking to enjoy warm and comfortable weather.

January Weather in San Bernardino: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in San Bernardino, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Bernardino, January typically has an average temperature of 25°C (78°F), with highs reaching up to 31°C (89°F) and lows dropping to around 18°C (65°F).

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

January Precipitation in San Bernardino

In San Bernardino in January, the precipitation amount is 11 mm (0.4 in) over the course of 2 days.

January Precipitation Trends in San Bernardino

The chart displays monthly precipitation patterns in San Bernardino, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In San Bernardino, January typically receives around 11 mm (0.4 inches) of precipitation spread over approximately 2 days.

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

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Millimeters (mm) Inches (in)

January Humidity in San Bernardino

In San Bernardino in January humidity is 67%. With an average temperature of 25°C (78°F), this humidity feels like traveling through a warm, heavy blanket that wraps around you, making outdoor activities feel a bit more strenuous, but also enveloping you in a tropical embrace that can be refreshing if you take breaks in the shade.

January Average Humidity in San Bernardino

This chart illustrates the average monthly humidity levels in San Bernardino, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in San Bernardino is approximately 67%, offering insight into how humid the weather typically is during this month.

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

January UV Index in San Bernardino

In San Bernardino in January, 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 San Bernardino.

Maximum UV Index Levels in San Bernardino for January

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

Data source: San Bernardino January 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 January Weather in San Bernardino Compares to Other Months

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

This table compares monthly weather conditions in San Bernardino, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	25°C (78°F)	11 mm (0.4 inches)	67%	very high
February Weather	25°C (78°F)	4 mm (0.2 inches)	66%	extreme
March Weather	26°C (80°F)	8 mm (0.3 inches)	63%	extreme
April Weather	27°C (81°F)	9 mm (0.3 inches)	66%	extreme
May Weather	27°C (81°F)	103 mm (4.1 inches)	71%	extreme
June Weather	26°C (80°F)	458 mm (18.0 inches)	73%	extreme
July Weather	27°C (81°F)	207 mm (8.1 inches)	78%	extreme
August Weather	27°C (80°F)	370 mm (14.6 inches)	78%	extreme
September Weather	26°C (80°F)	612 mm (24.1 inches)	77%	extreme
October Weather	26°C (79°F)	631 mm (24.8 inches)	77%	extreme
November Weather	26°C (79°F)	35 mm (1.4 inches)	75%	very high
December Weather	25°C (78°F)	7 mm (0.3 inches)	72%	very high