Weather in San Francisco in May
San Francisco, Costa Rica averages a high of 25°C (77°F) and low of 18.2°C (64.8°F) in May, with 23 rain days and 8.2 hours of daily sunshine. Travel score: 63.5/100 (Good). The best time to visit San Francisco is February.
High
25°C77°F
Low
18°C65°F
🌧️
23
rain days
☀️
8.2
hrs/day sunshine
💧
88%
humidity
64— Good
May in San Francisco is warm and very rainy — pack an umbrella and enjoy indoor attractions too.
What are the average temperatures in San Francisco?
How much does it rain in San Francisco in May?
San Francisco receives an average of 310.2mm of rainfall across 23 rainy days in May. The annual total is 2555.2mm.
What should I pack for San Francisco in May?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
👕
Light layers and t-shirts
Warm weather around 25°C
🧥
Waterproof jacket
Frequent rain expected (23 rainy days)
☔
Umbrella
Essential for the rainy season
👢
Waterproof shoes
Keep your feet dry in wet conditions
🧴
Sunscreen SPF 30+
8 hours of sunshine daily
🕶️
Sunglasses
Protect your eyes from bright sun
🎉Visiting Costa Rica in May?
Don't miss any public holidays — check before you book!
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Data based on 1994–2024 averages · Last updated: 2024-12-31