January Weather in Pleasant Hill, United States

Last updated: June 24, 2025

In January, the average temperature in Pleasant Hill, United States hovers around 6°C (43°F). Expect a chilly minimum of -16°C (3°F) and an occasional pleasant maximum of 25°C (77°F). With an average precipitation of 91 mm (3.6 in) spread across 9 days, and 85% humidity, it's wise to be prepared for both cool air and damp conditions.

January Temperature in Pleasant Hill

In January in Pleasant Hill, the average temperature is 6°C (43°F), with maximums reaching up to 25°C (77°F) and minimums plummeting as low as -16°C (3°F). Travelers should be prepared for a wide range of temperatures during this month, making layered clothing essential for comfort.

January Weather in Pleasant Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Pleasant Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pleasant Hill, January typically has an average temperature of 6°C (43°F), with highs reaching up to 25°C (77°F) and lows dropping to around -16°C (3°F).

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

January Precipitation in Pleasant Hill

In Pleasant Hill in January, the precipitation amount is 91 mm (3.6 in) spread over 9 days.

January Precipitation Trends in Pleasant Hill

The chart displays monthly precipitation patterns in Pleasant Hill, 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 Pleasant Hill, January typically receives around 91 mm (3.6 inches) of precipitation spread over approximately 9 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 Pleasant Hill

In Pleasant Hill in January, humidity is 85%. With an average temperature of 6°C (43°F), this humidity feels like a damp chill that seeps into your bones, making travel feel more uncomfortable and limiting your enjoyment of the sights as you navigate the wet, brisk air.

January Average Humidity in Pleasant Hill

This chart illustrates the average monthly humidity levels in Pleasant Hill, 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 Pleasant Hill is approximately 85%, 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 Pleasant Hill

In Pleasant Hill 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 Pleasant Hill for better planning.

Maximum UV Index Levels in Pleasant Hill for January

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

Data source: Pleasant Hill 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 Pleasant Hill Compares to Other Months

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

This table compares monthly weather conditions in Pleasant Hill, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	91 mm (3.6 inches)	85%	moderate
February Weather	9°C (49°F)	113 mm (4.4 inches)	82%	high
March Weather	11°C (53°F)	81 mm (3.2 inches)	81%	very high
April Weather	16°C (62°F)	100 mm (3.9 inches)	80%	very high
May Weather	21°C (70°F)	117 mm (4.6 inches)	81%	extreme
June Weather	24°C (76°F)	106 mm (4.2 inches)	81%	extreme
July Weather	27°C (80°F)	106 mm (4.2 inches)	81%	extreme
August Weather	26°C (78°F)	127 mm (5.0 inches)	80%	very high
September Weather	23°C (74°F)	143 mm (5.6 inches)	79%	very high
October Weather	18°C (65°F)	84 mm (3.3 inches)	80%	very high
November Weather	10°C (51°F)	80 mm (3.1 inches)	85%	moderate
December Weather	8°C (47°F)	107 mm (4.2 inches)	86%	moderate