Weather in South San Francisco in May
South San Francisco, United States averages a high of 17.6°C (63.7°F) and low of 10.9°C (51.6°F) in May, with 3 rain days and 12.7 hours of daily sunshine. Travel score: 81/100 (Excellent). The best time to visit South San Francisco is September.
High
18°C64°F
Low
11°C52°F
🌧️
3
rain days
☀️
12.7
hrs/day sunshine
💧
77%
humidity
81— Excellent
May in South San Francisco is mild and dry — excellent conditions for exploring.
What are the average temperatures in South San Francisco?
How much does it rain in South San Francisco in May?
South San Francisco receives an average of 17.5mm of rainfall across 3 rainy days in May. The annual total is 491.2mm.
What should I pack for South San Francisco in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 18°C
Recommended
🧴
Sunscreen
Sun protection is still recommended
🕶️
Sunglasses
Useful for sunny periods
Traveling to United States in May?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31