January Weather in San Francisco, Philippines

Last updated: August 27, 2025

In January, the average temperature in San Francisco, Philippines is a warm 26°C (79°F), with a minimum of 24°C (76°F) and a maximum reaching 28°C (83°F). Expect significant rainfall, averaging 297 mm (11.7 in) over 23 days, accompanied by high humidity at 90%. Be prepared for a tropical experience!

January Temperature in San Francisco

In January in San Francisco, the average temperature is 26°C (79°F). The maximum can reach 28°C (83°F), and the minimum can be as low as 24°C (76°F). This pleasant climate makes San Francisco an ideal destination for travelers seeking warm weather and enjoyable outdoor activities.

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 28°C (83°F) and lows dropping to around 24°C (76°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 total precipitation amount reached 297 mm (11.7 in) over the course of 23 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 297 mm (11.7 inches) of precipitation spread over approximately 23 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 90%. With an average temperature of 26°C (79°F), this humidity feels like a warm, heavy blanket wrapping around you, making travel feel sticky and draining, while every step requires extra effort in the sweltering embrace of the moist air.

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 90%, 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 reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. 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 13, 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)	297 mm (11.7 inches)	90%	extreme
February Weather	26°C (79°F)	224 mm (8.8 inches)	90%	extreme
March Weather	26°C (80°F)	162 mm (6.4 inches)	90%	extreme
April Weather	27°C (81°F)	90 mm (3.6 inches)	88%	extreme
May Weather	27°C (82°F)	132 mm (5.2 inches)	83%	extreme
June Weather	28°C (82°F)	186 mm (7.3 inches)	81%	extreme
July Weather	28°C (82°F)	238 mm (9.4 inches)	80%	extreme
August Weather	28°C (82°F)	189 mm (7.4 inches)	81%	extreme
September Weather	28°C (82°F)	215 mm (8.5 inches)	84%	extreme
October Weather	27°C (81°F)	263 mm (10.4 inches)	81%	extreme
November Weather	27°C (81°F)	241 mm (9.5 inches)	84%	extreme
December Weather	27°C (80°F)	391 mm (15.4 inches)	88%	extreme