February in San Mateo averages a daily high of 15.6°C with nights around 8°C. Expect roughly 10.1 wet days totalling 91.3mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit San Mateo is May–October.
Based on SAN FRANCISCO INTERNATIONAL AIRPORT, CA US (7.2km), 1995–2024. 30 years of February data.