January Weather in Stockton, United States

Last updated: June 24, 2025

In January, the average temperature in Stockton, United States hovers around -1°C (30°F). While it can dip as low as -25°C (-13°F), residents may also enjoy warmer days reaching up to 19°C (66°F). Expect a total precipitation of 24 mm (0.9 in) spread over 3 days, accompanied by an average humidity level of 74%, adding a crisp touch to the winter air.

January Temperature in Stockton

In January, Stockton experiences a chilly average temperature of -1°C (30°F), with maximums sometimes reaching a mild 19°C (66°F) and minimums plunging to a frigid -25°C (-13°F). Pack warm clothing and be prepared for a wide range of temperatures if you're planning to visit during this time.

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

The chart illustrates January temperature patterns in Stockton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Stockton, January typically has an average temperature of -1°C (30°F), with highs reaching up to 19°C (66°F) and lows dropping to around -25°C (-13°F).

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

January Precipitation in Stockton

In Stockton in January, the precipitation amount is 24 mm (0.9 in) over a span of 3 days.

January Precipitation Trends in Stockton

The chart displays monthly precipitation patterns in Stockton, 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 Stockton, January typically receives around 24 mm (0.9 inches) of precipitation spread over approximately 3 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 Stockton

In Stockton in January humidity is 74%. With an average temperature of -1°C (30°F), this humidity feels like a chilling embrace, making travel uncomfortable as your breath fogs in the cold air, and dampness seeps into your clothes, leaving you longing for warmth and comfort.

January Average Humidity in Stockton

This chart illustrates the average monthly humidity levels in Stockton, 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 Stockton is approximately 74%, 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 Stockton

In Stockton 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 Stockton, you can check the information here.

Maximum UV Index Levels in Stockton for January

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

Data source: Stockton 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 Stockton Compares to Other Months

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

This table compares monthly weather conditions in Stockton, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (30°F)	24 mm (0.9 inches)	74%	moderate
February Weather	-1°C (31°F)	20 mm (0.8 inches)	78%	moderate
March Weather	7°C (44°F)	67 mm (2.7 inches)	67%	high
April Weather	11°C (53°F)	38 mm (1.5 inches)	70%	very high
May Weather	17°C (64°F)	158 mm (6.2 inches)	82%	very high
June Weather	25°C (77°F)	60 mm (2.4 inches)	81%	extreme
July Weather	27°C (81°F)	74 mm (2.9 inches)	80%	extreme
August Weather	25°C (77°F)	87 mm (3.4 inches)	80%	very high
September Weather	22°C (72°F)	59 mm (2.3 inches)	73%	very high
October Weather	12°C (55°F)	58 mm (2.3 inches)	71%	high
November Weather	6°C (44°F)	18 mm (0.7 inches)	79%	moderate
December Weather	2°C (35°F)	32 mm (1.3 inches)	83%	moderate