San Francisco Weather in May

In San Francisco, May brings high daytime temperatures around 22°C (72°F), with nights cooling to 14°C (57°F). This month falls within the rainy season, so expect frequent rainfall.

Rainfall in San Francisco in May

As part of the rainy season, San Francisco sees around 18 days of rain in May, with an average of 334 mm (13 in). Showers during the rainy season tend to be heavy and can come down intensely. An umbrella is often not enough, so a poncho or waterproof jacket is a better choice.

Temperature in San Francisco in May

In May, San Francisco gets high temperatures, with highs of 22°C (72°F). Nights cool to around 14°C (57°F). This kind of day-to-night contrast is typical for this time of year. With overnight lows of 14°C (57°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in San Francisco in May

With limited sunshine this month, there are about 83 hours of sun. It's ideal for those who prefer a cooler, cloudier climate.

If you prefer dry days with pleasant temperatures, May may not be the ideal month to visit San Francisco. Our weather planner can help you explore destinations with more pleasant weather conditions.