San Francisco Weather in May

San Francisco in May sees pleasant daytime temperatures of 19°C (66°F) and nighttime lows of 11°C (52°F). With just 7.1 mm (0.3 in) of rainfall expected, it's a dry month overall.

Rainfall in San Francisco in May

You can expect rain on around 2 days based on historical patterns, with 7.1 mm (0.3 in) average for the month. Rain days are few and the total is low, so this is a largely dry month. Any showers that do occur tend to be brief.

Temperature in San Francisco in May

Weather in San Francisco is at its excellent in May. Highs reach 19°C (66°F), while nights settle around 11°C (52°F). Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights drop to around 11°C (52°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in San Francisco in May

The days are predominantly sunny, with an estimated total of around 324 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.

Wind Speed in San Francisco in May

Average wind conditions reach 6 m/s (12 knots) in May. This creates notably windy weather that is clearly felt and can influence daily activities. Keep in mind this is an average. Some days are less intense, while others can be quite gusty.

Average water temperature in May

At 13°C (55°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.

If your ideal day consists of dry skies and pleasant temperatures, May, June, July, August, September and October typically offer the best circumstances for San Francisco.