San Francisco Weather in May
May in San Francisco typically sees daytime highs of 22°C (72°F) and nighttime lows of 16°C (61°F). Expect some rainfall during the month.
Rainfall in San Francisco in May
Historically, May sees about 8 days of rain, with a monthly average of 24 mm (0.9 in). Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in San Francisco in May
San Francisco in May is worth a visit. The temperature is excellent, with 22°C (72°F) during the day and 16°C (61°F) at night. This kind of day-to-night contrast is typical for this time of year. Nights cool down to 16°C (61°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.
Sunshine in San Francisco in May
The city usually sees around 294 hours of sunlight, indicating many sunny days , a great month for sightseeing.
Wind Speed in San Francisco in May
May sees wind speeds averaging 2 m/s (4 knots). You'll typically experience pleasant light breezes that move leaves slightly and feel refreshing. As an average, expect variation from very calm days to periods with more apparent air movement.
Average water temperature in May
The water temperature is 19°C (66°F). It's not warm, but most people find it perfectly fine for a swim once they're in.If your ideal day consists of dry skies and pleasant temperatures, April, May, June, July, August, September and October typically offer the best circumstances for San Francisco.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our San Francisco's climate page.
San Francisco Temperature in May
Min Temperature
16°C (61°F)
Max Temperature
22°C (72°F)
Water Temperature
19°C (66°F) *
Chance of Rain
25%
Precipitation
24 mm (0.9 in)
Rainy days
8 days
Humidity
61% *
Windspeed
2 m/s (4 knots) *
Sunshine
294 hours *
Percentage Sunshine
71% *
Best Places in Spain in May
Find out more about the weather in Spain and which places have the best travel conditions in this month. See all of Spain in May →
perfect weather
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What to Wear in San Francisco in May
Pleasant temperatures in May mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Pack a light rain jacket or compact umbrella for occasional showers. The water temperature sits at about 19°C (66°F), which is too chilly for most people to enjoy swimming. Leave the swimsuit at home unless you love cold water. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in San Francisco in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Spain, check out our San Francisco's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full San Francisco climate overview or explore weather in Spain.
