San Mateo, California Weather:
Sunday, October 18, 2026
Sunny Weather
Day 77°
Night 57°
Precipitation 20 %
Wind 5 mph
UV Index (0 - 11+) 4
Weather Forecast History
Last Year's Weather on This Day (October 18, 2025)
Night

Day

81°

Night

54°

Wind

5 mph

Precipitation

0 %