January Weather in Los Altos, United States

Last updated: June 24, 2025

In January, the average temperature in Los Altos, United States hovers around 10°C (51°F). Expect a minimum of 1°C (34°F) and a maximum of 23°C (74°F). During this month, anticipate approximately 98 mm (3.9 in) of precipitation spread over 8 days, with an average humidity level of 82%—perfect for those cozy indoor days!

January Temperature in Los Altos

In January in Los Altos, the average temperature is 10°C (51°F). Maximums can reach 23°C (74°F), and minimums can be as low as 1°C (34°F). It's a great time to visit for those who enjoy mild weather and outdoor activities!

January Weather in Los Altos: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Los Altos, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Los Altos, January typically has an average temperature of 10°C (51°F), with highs reaching up to 23°C (74°F) and lows dropping to around 1°C (34°F).

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

January Precipitation in Los Altos

In Los Altos in January, the total precipitation amount is 98 mm (3.9 in), occurring over 8 days.

January Precipitation Trends in Los Altos

The chart displays monthly precipitation patterns in Los Altos, 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 Los Altos, January typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 8 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 Los Altos

In Los Altos in January humidity is 82%. With an average temperature of 10°C (51°F), this humidity feels like a damp chill that clings to your skin, making outdoor adventures less appealing and prompting travelers to seek cozy indoor activities or warm drinks to counter the brisk air.

January Average Humidity in Los Altos

This chart illustrates the average monthly humidity levels in Los Altos, 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 Los Altos is approximately 82%, 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 Los Altos

In Los Altos 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 Los Altos, you can check the information here.

Maximum UV Index Levels in Los Altos for January

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

Data source: Los Altos 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 Los Altos Compares to Other Months

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

This table compares monthly weather conditions in Los Altos, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	10°C (51°F)	98 mm (3.9 inches)	82%	moderate
February Weather	11°C (52°F)	95 mm (3.8 inches)	84%	moderate
March Weather	12°C (54°F)	87 mm (3.4 inches)	82%	very high
April Weather	14°C (57°F)	30 mm (1.2 inches)	78%	very high
May Weather	16°C (61°F)	23 mm (0.9 inches)	71%	very high
June Weather	19°C (66°F)	1 mm (0.0 inches)	64%	extreme
July Weather	20°C (69°F)	0 mm (0.0 inches)	58%	extreme
August Weather	21°C (70°F)	0 mm (0.0 inches)	54%	very high
September Weather	20°C (69°F)	2 mm (0.1 inches)	55%	very high
October Weather	18°C (64°F)	22 mm (0.9 inches)	62%	high
November Weather	13°C (56°F)	40 mm (1.6 inches)	78%	moderate
December Weather	10°C (51°F)	81 mm (3.2 inches)	80%	moderate