January Weather in Palo Alto, United States

Last updated: June 24, 2025

In January, the average temperature in Palo Alto, United States hovers around -1°C (30°F), with extremes ranging from a chilly -20°C (-4°F) to a mild 17°C (63°F). Expect about 74 mm (2.9 in) of precipitation spread over 8 days, contributing to an average humidity of 87%. Be prepared for a damp yet crisp atmosphere!

January Temperature in Palo Alto

In January in Palo Alto, the average temperature is -1°C (30°F), with maximums reaching 17°C (63°F) and minimums dropping as low as -20°C (-4°F). It's essential to pack layered clothing and be prepared for fluctuating weather conditions while traveling during this time.

January Weather in Palo Alto: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Palo Alto, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Palo Alto, January typically has an average temperature of -1°C (30°F), with highs reaching up to 17°C (63°F) and lows dropping to around -20°C (-4°F).

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

January Precipitation in Palo Alto

In Palo Alto in January, the precipitation amount is 74 mm (2.9 in) over a period of 8 days.

January Precipitation Trends in Palo Alto

The chart displays monthly precipitation patterns in Palo Alto, 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 Palo Alto, January typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for January generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Palo Alto

In Palo Alto in January, humidity is 87%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that penetrates through layers of clothing, making travel uncomfortable as the dampness clings to your skin, intensifying the cold and causing every gust of wind to feel even more frigid.

January Average Humidity in Palo Alto

This chart illustrates the average monthly humidity levels in Palo Alto, 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 Palo Alto 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 Palo Alto

In Palo Alto 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 Palo Alto, you can check the information here.

Maximum UV Index Levels in Palo Alto for January

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

Data source: Palo Alto 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 Palo Alto Compares to Other Months

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

This table compares monthly weather conditions in Palo Alto, 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)	74 mm (2.9 inches)	87%	moderate
February Weather	1°C (33°F)	106 mm (4.2 inches)	85%	moderate
March Weather	4°C (39°F)	96 mm (3.8 inches)	85%	high
April Weather	10°C (50°F)	111 mm (4.4 inches)	83%	very high
May Weather	16°C (61°F)	133 mm (5.2 inches)	75%	very high
June Weather	21°C (69°F)	118 mm (4.6 inches)	73%	very high
July Weather	24°C (75°F)	163 mm (6.4 inches)	65%	very high
August Weather	22°C (73°F)	155 mm (6.1 inches)	62%	very high
September Weather	19°C (67°F)	117 mm (4.6 inches)	66%	very high
October Weather	13°C (57°F)	117 mm (4.6 inches)	79%	high
November Weather	5°C (42°F)	99 mm (3.9 inches)	87%	moderate
December Weather	1°C (35°F)	93 mm (3.7 inches)	85%	low