January Weather in Pleasanton, United States

Last updated: June 24, 2025

In January, the average temperature in Pleasanton, United States hovers around 13°C (55°F). However, don’t be surprised if you experience a chilly minimum of -7°C (20°F) or a warm maximum of 30°C (87°F). With an average precipitation of 32 mm (1.3 in) spread across 6 days, the month also boasts a humidity level of 79%, creating a unique and vibrant atmosphere.

January Temperature in Pleasanton

In January in Pleasanton, the average temperature is 13°C (55°F), with maximums reaching 30°C (87°F) and minimums dropping as low as -7°C (20°F). This range makes it essential for travelers to prepare for both warm days and chilly nights.

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

The chart illustrates January temperature patterns in Pleasanton, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pleasanton, January typically has an average temperature of 13°C (55°F), with highs reaching up to 30°C (87°F) and lows dropping to around -7°C (20°F).

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

January Precipitation in Pleasanton

In Pleasanton in January, the total precipitation amount is 32 mm (1.3 in) over the course of 6 days.

January Precipitation Trends in Pleasanton

The chart displays monthly precipitation patterns in Pleasanton, 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 Pleasanton, January typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 6 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 Pleasanton

In Pleasanton in January humidity is 79%. With an average temperature of 13°C (55°F), this humidity feels like a damp chill that permeates clothing, making outdoor activities slightly uncomfortable and prompting travelers to seek shelter or dress in layers to stay warm while adjusting to the moist air.

January Average Humidity in Pleasanton

This chart illustrates the average monthly humidity levels in Pleasanton, 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 Pleasanton is approximately 79%, 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 Pleasanton

In Pleasanton in January, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Pleasanton.

Maximum UV Index Levels in Pleasanton for January

The chart shows the monthly maximum UV Index (UVI) for Pleasanton 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 Pleasanton typically reaches 5, which falls under the moderate exposure category.

Data source: Pleasanton 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 Pleasanton Compares to Other Months

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

This table compares monthly weather conditions in Pleasanton, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	32 mm (1.3 inches)	79%	moderate
February Weather	14°C (58°F)	46 mm (1.8 inches)	79%	very high
March Weather	20°C (67°F)	53 mm (2.1 inches)	74%	very high
April Weather	22°C (73°F)	52 mm (2.0 inches)	76%	extreme
May Weather	26°C (80°F)	103 mm (4.1 inches)	81%	extreme
June Weather	29°C (85°F)	64 mm (2.5 inches)	76%	extreme
July Weather	30°C (87°F)	72 mm (2.8 inches)	66%	extreme
August Weather	31°C (88°F)	52 mm (2.1 inches)	58%	extreme
September Weather	28°C (82°F)	108 mm (4.3 inches)	65%	extreme
October Weather	23°C (74°F)	76 mm (3.0 inches)	74%	very high
November Weather	17°C (64°F)	43 mm (1.7 inches)	81%	high
December Weather	14°C (58°F)	43 mm (1.7 inches)	86%	moderate