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May Weather in San Francisco, Philippines

Last updated: August 27, 2025

In May, the average temperature in San Francisco, Philippines is a warm 28°C (83°F), with minimums dipping to 23°C (73°F) and maximums soaring to 36°C (96°F). Expect substantial precipitation with an average of 234 mm (9.2 in) over 26 days, creating a humid environment with an average humidity of 78%. Ideal for those who enjoy tropical climates!

May Temperature in San Francisco

In May in San Francisco, the average temperature is 28°C (83°F). Maximums can reach 36°C (96°F), while minimums can drop to as low as 23°C (73°F). This warm climate makes San Francisco an ideal destination for travelers seeking sunny weather and 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 28°C (83°F), with highs reaching up to 36°C (96°F) and lows dropping to around 23°C (73°F).
JanFebMarAprMayJunJulAugSepOctNovDec787981828280798079808079
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 234 mm (9.2 in) spread over 26 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 234 mm (9.2 inches) of precipitation spread over approximately 26 days.
JanFebMarAprMayJunJulAugSepOctNovDec123768675234411490459493435176246
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 78%. With an average temperature of 28°C (83°F), this humidity feels like a heavy blanket enveloping you, making outdoor activities perspire more quickly and requiring frequent breaks in the shade for comfort.

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 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec81%78%76%77%78%80%81%83%85%81%83%86%
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 is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in San Francisco, you can check here.

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 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec121416161414141515141211
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 Weather26°C (79°F)123 mm (4.8 inches)81%extreme
February Weather26°C (79°F)76 mm (3.0 inches)78%extreme
March Weather27°C (81°F)86 mm (3.4 inches)76%extreme
April Weather28°C (83°F)75 mm (3.0 inches)77%extreme
May Weather28°C (83°F)234 mm (9.2 inches)78%extreme
June Weather27°C (81°F)411 mm (16.2 inches)80%extreme
July Weather26°C (80°F)490 mm (19.3 inches)81%extreme
August Weather26°C (80°F)458 mm (18.0 inches)83%extreme
September Weather26°C (80°F)493 mm (19.4 inches)85%extreme
October Weather26°C (80°F)435 mm (17.1 inches)80%extreme
November Weather27°C (80°F)176 mm (6.9 inches)83%extreme
December Weather26°C (80°F)245 mm (9.7 inches)86%extreme

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