January Weather in Berkeley, United States

Last updated: June 24, 2025

In Berkeley, United States, the average temperature in January hovers around -4°C (26°F), with extreme variations that can dip to a chilling -31°C (-23°F) or rise to a mild 15°C (59°F). Expect 61 mm (2.4 in) of precipitation spread over 8 days, contributing to an average humidity of 82% that adds to the region's brisk atmosphere.

January Temperature in Berkeley

In January in Berkeley, the average temperature is -4°C (26°F). Maximum temperatures can reach 15°C (59°F), while the minimum can drop as low as -31°C (-23°F). Be prepared for a wide range of temperatures when traveling to Berkeley during this month.

January Weather in Berkeley: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Berkeley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Berkeley, January typically has an average temperature of -4°C (26°F), with highs reaching up to 15°C (59°F) and lows dropping to around -31°C (-23°F).

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

January Precipitation in Berkeley

In Berkeley in January, the precipitation amount is 61 mm (2.4 in) distributed over 8 days.

January Precipitation Trends in Berkeley

The chart displays monthly precipitation patterns in Berkeley, 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 Berkeley, January typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Berkeley

In Berkeley in January humidity is 82%. With an average temperature of -4°C (26°F), this humidity feels like an icy blanket enveloping you, making every step outside a battle against the chill and dampness—where the cold bites deeper, and the air feels heavy, reminding you that even in the winter, the moisture can be overwhelming for any traveler unprepared for such conditions.

January Average Humidity in Berkeley

This chart illustrates the average monthly humidity levels in Berkeley, 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 Berkeley is approximately 82%, 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 Berkeley

In Berkeley in January, 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 Berkeley, you can check the information here.

Maximum UV Index Levels in Berkeley for January

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

Data source: Berkeley 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 Berkeley Compares to Other Months

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

This table compares monthly weather conditions in Berkeley, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (26°F)	61 mm (2.4 inches)	82%	moderate
February Weather	-2°C (28°F)	60 mm (2.4 inches)	83%	moderate
March Weather	4°C (39°F)	79 mm (3.1 inches)	84%	high
April Weather	9°C (48°F)	115 mm (4.5 inches)	85%	very high
May Weather	15°C (60°F)	164 mm (6.4 inches)	79%	very high
June Weather	21°C (71°F)	134 mm (5.3 inches)	82%	very high
July Weather	24°C (75°F)	105 mm (4.1 inches)	80%	very high
August Weather	23°C (73°F)	92 mm (3.6 inches)	81%	very high
September Weather	20°C (68°F)	85 mm (3.3 inches)	80%	very high
October Weather	12°C (54°F)	127 mm (5.0 inches)	82%	high
November Weather	4°C (39°F)	55 mm (2.2 inches)	88%	moderate
December Weather	0°C (33°F)	53 mm (2.1 inches)	84%	low