Weather in San Mateo in January
San Mateo, United States averages a high of 13.9°C (57°F) and low of 7°C (44.6°F) in January, with 9 rain days and 7.3 hours of daily sunshine. Travel score: 62.3/100 (Good). The best time to visit San Mateo is September.
High
14°C57°F
Low
7°C45°F
🌧️
9
rain days
☀️
7.3
hrs/day sunshine
💧
84%
humidity
62— Good
January in San Mateo is cool and occasionally wet — good for most activities.
What are the average temperatures in San Mateo?
How much does it rain in San Mateo in January?
San Mateo receives an average of 98.3mm of rainfall across 9 rainy days in January. The annual total is 510.8mm.
What should I pack for San Mateo in January?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Warm coat
Cool weather with highs around 14°C
🧶
Sweaters and warm layers
Layer up for comfort
🎉Visiting United States in January?
Don't miss any public holidays — check before you book!
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What is the weather like in other months in San Mateo?
Data based on 1994–2024 averages · Last updated: 2024-12-31