January Weather in Pleasanton, United States

Last updated: June 24, 2025

In Pleasanton, United States, the average temperature in January hovers around 1°C (34°F). Expect a minimum drop to -21°C (-5°F) and a potential maximum of 19°C (66°F). During this month, precipitation typically measures 63 mm (2.5 in) over 6 days, accompanied by an average humidity level of 80%. Stay prepared for a chilly and damp experience!

January Temperature in Pleasanton

In January in Pleasanton, the average temperature is 1°C (34°F). The maximum can reach 19°C (66°F), while the minimum can drop as low as -21°C (-5°F). Travelers should be prepared for a wide range of temperatures and pack accordingly.

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 1°C (34°F), with highs reaching up to 19°C (66°F) and lows dropping to around -21°C (-5°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 precipitation amount is 63 mm (2.5 in) spread over a duration 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 63 mm (2.5 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 80%. With an average temperature of 1°C (34°F), this humidity feels like a damp chill that seeps through your layers, making outdoor activities uncomfortable and potentially discouraging for travelers.

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 80%, 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 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 Pleasanton, you can check the information here.

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 3, 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	1°C (34°F)	63 mm (2.5 inches)	80%	moderate
February Weather	2°C (35°F)	49 mm (1.9 inches)	78%	moderate
March Weather	9°C (48°F)	107 mm (4.2 inches)	75%	high
April Weather	13°C (56°F)	111 mm (4.4 inches)	77%	very high
May Weather	19°C (67°F)	186 mm (7.3 inches)	82%	very high
June Weather	25°C (78°F)	93 mm (3.6 inches)	83%	extreme
July Weather	27°C (81°F)	129 mm (5.1 inches)	81%	extreme
August Weather	25°C (77°F)	120 mm (4.7 inches)	78%	very high
September Weather	23°C (73°F)	77 mm (3.0 inches)	72%	very high
October Weather	15°C (58°F)	106 mm (4.2 inches)	72%	high
November Weather	8°C (46°F)	47 mm (1.9 inches)	84%	moderate
December Weather	4°C (40°F)	33 mm (1.3 inches)	86%	moderate