January Weather in San Francisco, Colombia

Last updated: August 23, 2025

In January, the average temperature in San Francisco, Colombia hovers around 13°C (56°F). You'll experience a minimum of 5°C (42°F) and can expect warm days reaching up to 22°C (71°F). However, be prepared for some rainy days, as it sees an average precipitation of 205 mm (8.1 in) spread over 24 days. With an average humidity of 72%, the air can feel quite damp; don’t forget to pack your umbrella!

January Temperature in San Francisco

In January in San Francisco, the average temperature is 13°C (56°F), with maximums reaching up to 22°C (71°F) and minimums dropping as low as 5°C (42°F). Overall, it's a mild and comfortable time to visit, making it perfect for outdoor exploration and sightseeing.

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 13°C (56°F), with highs reaching up to 22°C (71°F) and lows dropping to around 5°C (42°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 205 mm (8.1 in) over a span of 24 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 205 mm (8.1 inches) of precipitation spread over approximately 24 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 72%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making outdoor activities somewhat uncomfortable and reminding travelers to stay hydrated and seek shade whenever possible.

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 72%, 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 an alarming 17, which falls under the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to stay protected. For more details on the hourly UV index in San Francisco, you can check 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 17, 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	13°C (56°F)	205 mm (8.1 inches)	72%	extreme
February Weather	14°C (57°F)	218 mm (8.6 inches)	66%	extreme
March Weather	14°C (57°F)	350 mm (13.8 inches)	74%	extreme
April Weather	13°C (56°F)	336 mm (13.2 inches)	83%	extreme
May Weather	13°C (56°F)	353 mm (13.9 inches)	93%	extreme
June Weather	13°C (55°F)	292 mm (11.5 inches)	93%	extreme
July Weather	12°C (54°F)	231 mm (9.1 inches)	84%	extreme
August Weather	12°C (54°F)	161 mm (6.3 inches)	61%	extreme
September Weather	13°C (55°F)	186 mm (7.3 inches)	53%	extreme
October Weather	13°C (56°F)	274 mm (10.8 inches)	67%	extreme
November Weather	14°C (57°F)	305 mm (12.0 inches)	78%	extreme
December Weather	13°C (56°F)	272 mm (10.7 inches)	85%	extreme