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May Weather in San Francisco, Colombia

Last updated: August 23, 2025

In May, the average temperature in San Francisco, Colombia is a mild 17°C (62°F), with a minimum dipping to 11°C (52°F) and a maximum peaking at 24°C (76°F). Expect a fair amount of rain, as 307 mm (12.1 in) of precipitation typically falls over 28 days, resulting in an average humidity of 85%. Perfect for cozy indoor activities or a refreshing stroll!

May Temperature in San Francisco

In May in San Francisco, the average temperature is 17°C (62°F). Maximums can reach 24°C (76°F) and minimums can be as low as 11°C (52°F). This mild climate makes San Francisco an ideal destination for travelers seeking comfortable weather for outdoor activities.

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

The chart illustrates May 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, May typically has an average temperature of 17°C (62°F), with highs reaching up to 24°C (76°F) and lows dropping to around 11°C (52°F).
JanFebMarAprMayJunJulAugSepOctNovDec616161626262636362616161
Data source: Temperature data for San Francisco generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in San Francisco

In San Francisco in May, the total precipitation amount is 307 mm (12.1 in), which falls over a period of 28 days.

May Precipitation Trends in San Francisco

The chart displays monthly precipitation patterns in San Francisco, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In San Francisco, May typically receives around 307 mm (12.1 inches) of precipitation spread over approximately 28 days.
JanFebMarAprMayJunJulAugSepOctNovDec122240345308307184128123198304257165
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in San Francisco

In San Francisco in May humidity is 85%. With an average temperature of 17°C (62°F), this humidity feels like a warm, heavy blanket enveloping you, making travel somewhat uncomfortable as you navigate the thick, moist air that clings to your skin and slows your pace.

May Average Humidity in San Francisco

This chart illustrates the average monthly humidity levels in San Francisco, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in San Francisco is approximately 85%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec51%46%50%64%85%92%89%73%64%68%73%66%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in San Francisco

In San Francisco in May, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in San Francisco.

Maximum UV Index Levels in San Francisco for May

The chart shows the monthly maximum UV Index (UVI) for San Francisco in May, 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 May, the maximum UV index in San Francisco typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec131416161514131414141211
Data source: San Francisco May 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 May 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 May’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 May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather16°C (61°F)122 mm (4.8 inches)51%extreme
February Weather16°C (61°F)240 mm (9.5 inches)46%extreme
March Weather16°C (61°F)345 mm (13.6 inches)49%extreme
April Weather16°C (62°F)308 mm (12.1 inches)63%extreme
May Weather17°C (62°F)307 mm (12.1 inches)85%extreme
June Weather17°C (62°F)184 mm (7.2 inches)92%extreme
July Weather17°C (63°F)128 mm (5.0 inches)89%extreme
August Weather17°C (63°F)123 mm (4.8 inches)73%extreme
September Weather17°C (62°F)198 mm (7.8 inches)64%extreme
October Weather16°C (61°F)304 mm (12.0 inches)67%extreme
November Weather16°C (61°F)257 mm (10.1 inches)73%extreme
December Weather16°C (61°F)165 mm (6.5 inches)66%extreme

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