January Weather in Central Valley, United States

Last updated: June 24, 2025

In January, the average temperature in Central Valley, United States hovers around -5°C (23°F). However, be prepared for temperatures that can plunge to a minimum of -23°C (-10°F) and rise to a pleasant maximum of 9°C (49°F). This month also sees an average precipitation of 42 mm (1.6 in) over 7 days, combined with a high average humidity level of 87%. Don't forget your warm clothes!

January Temperature in Central Valley

In January in Central Valley, the average temperature is -5°C (23°F), with maximums reaching 9°C (49°F) and minimums dropping as low as -23°C (-10°F). Travelers should be prepared for chilly weather and pack accordingly to stay warm and comfortable.

January Weather in Central Valley: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Central Valley, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Central Valley, January typically has an average temperature of -5°C (23°F), with highs reaching up to 9°C (49°F) and lows dropping to around -23°C (-10°F).

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

January Precipitation in Central Valley

In Central Valley in January, the total precipitation amount is 42 mm (1.6 in) accumulated over a span of 7 days.

January Precipitation Trends in Central Valley

The chart displays monthly precipitation patterns in Central Valley, 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 Central Valley, January typically receives around 42 mm (1.6 inches) of precipitation spread over approximately 7 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 Central Valley

In Central Valley in January humidity is 87%. With an average temperature of -5°C (23°F), this humidity feels like a heavy, damp blanket enveloping you, making even the cold air seem more biting and clammy, which can be quite uncomfortable for traveling.

January Average Humidity in Central Valley

This chart illustrates the average monthly humidity levels in Central Valley, 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 Central Valley is approximately 87%, 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 Central Valley

In Central Valley in January, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Central Valley for better planning.

Maximum UV Index Levels in Central Valley for January

The chart shows the monthly maximum UV Index (UVI) for Central Valley 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 Central Valley typically reaches 4, which falls under the moderate exposure category.

Data source: Central Valley 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 Central Valley Compares to Other Months

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

This table compares monthly weather conditions in Central Valley, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	42 mm (1.6 inches)	87%	moderate
February Weather	-4°C (26°F)	55 mm (2.2 inches)	88%	high
March Weather	0°C (33°F)	59 mm (2.3 inches)	77%	very high
April Weather	5°C (42°F)	46 mm (1.8 inches)	69%	extreme
May Weather	11°C (52°F)	44 mm (1.7 inches)	54%	extreme
June Weather	19°C (66°F)	8 mm (0.3 inches)	45%	extreme
July Weather	22°C (72°F)	21 mm (0.8 inches)	37%	extreme
August Weather	21°C (71°F)	20 mm (0.8 inches)	34%	extreme
September Weather	16°C (61°F)	23 mm (0.9 inches)	47%	very high
October Weather	7°C (44°F)	36 mm (1.4 inches)	67%	high
November Weather	2°C (37°F)	27 mm (1.1 inches)	82%	high
December Weather	-4°C (25°F)	40 mm (1.6 inches)	87%	moderate