Weather in San Diego in January
San Diego, United States averages a high of 17.5°C (63.5°F) and low of 8.7°C (47.7°F) in January, with 5 rain days and 8.9 hours of daily sunshine. Travel score: 77.1/100 (Good). The best time to visit San Diego is July.
High
18°C64°F
Low
9°C48°F
🌧️
5
rain days
☀️
8.9
hrs/day sunshine
💧
74%
humidity
77— Good
January in San Diego is mild and mostly dry — good for most activities.
What are the average temperatures in San Diego?
How much does it rain in San Diego in January?
San Diego receives an average of 53.5mm of rainfall across 5 rainy days in January. The annual total is 290.5mm.
What should I pack for San Diego in January?
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
🎉Visiting United States in January?
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