Weather in San Mateo in May
San Mateo, United States averages a high of 19.2°C (66.6°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: 83.8/100 (Excellent). The best time to visit San Mateo is September.
High
19°C67°F
Low
11°C52°F
🌧️
3
rain days
☀️
12.7
hrs/day sunshine
💧
75%
humidity
84— Excellent
May in San Mateo is mild and mostly dry — excellent conditions for exploring.
What are the average temperatures in San Mateo?
How much does it rain in San Mateo in May?
San Mateo receives an average of 18.9mm of rainfall across 3 rainy days in May. The annual total is 510.8mm.
What should I pack for San Mateo in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 19°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