January Weather in San Francisco, Philippines

Last updated: August 27, 2025

In January, the average temperature in San Francisco, Philippines hovers around 26°C (79°F). Expect a comfortable range, with minimums dipping to 21°C (70°F) and maximums peaking at 32°C (90°F). However, be prepared for some rain, as 123 mm (4.8 in) of precipitation may fall over 13 days. The air remains quite humid, with an average humidity level of 81%—perfect for those who enjoy a tropical atmosphere!

January Temperature in San Francisco

In January, in San Francisco, the average temperature is 26°C (79°F), with maximums reaching 32°C (90°F) and minimums dropping as low as 21°C (70°F). This pleasant climate makes San Francisco an ideal destination for outdoor activities and exploration.

January Weather in San Francisco: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in San Francisco, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In San Francisco, January typically has an average temperature of 26°C (79°F), with highs reaching up to 32°C (90°F) and lows dropping to around 21°C (70°F).

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

January Precipitation in San Francisco

In San Francisco in January, the precipitation amount is 123 mm (4.8 in) over the course of 13 days.

January Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, 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 San Francisco, January typically receives around 123 mm (4.8 inches) of precipitation spread over approximately 13 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 San Francisco

In San Francisco in January, humidity is 81%. With an average temperature of 26°C (79°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor adventures stickier and more draining, yet still vibrant with life—perfect for exploring local culture, but you'll want to take frequent breaks and stay hydrated.

January Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, 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 San Francisco is approximately 81%, 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 San Francisco

In San Francisco in January, the maximum UV index is 12, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, underscoring the importance of sun protection. For detailed information, you can check the Hourly UV Index in San Francisco.

Maximum UV Index Levels in San Francisco for January

The chart shows the monthly maximum UV Index (UVI) for San Francisco 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 San Francisco typically reaches 12, which falls under the extreme exposure category.

Data source: San Francisco 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 San Francisco Compares to Other Months

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

This table compares monthly weather conditions in San Francisco, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	123 mm (4.8 inches)	81%	extreme
February Weather	26°C (79°F)	76 mm (3.0 inches)	78%	extreme
March Weather	27°C (81°F)	86 mm (3.4 inches)	76%	extreme
April Weather	28°C (83°F)	75 mm (3.0 inches)	77%	extreme
May Weather	28°C (83°F)	234 mm (9.2 inches)	78%	extreme
June Weather	27°C (81°F)	411 mm (16.2 inches)	80%	extreme
July Weather	26°C (80°F)	490 mm (19.3 inches)	81%	extreme
August Weather	26°C (80°F)	458 mm (18.0 inches)	83%	extreme
September Weather	26°C (80°F)	493 mm (19.4 inches)	85%	extreme
October Weather	26°C (80°F)	435 mm (17.1 inches)	80%	extreme
November Weather	27°C (80°F)	176 mm (6.9 inches)	83%	extreme
December Weather	26°C (80°F)	245 mm (9.7 inches)	86%	extreme