San Mateo, California Weather:
Tuesday, April 21, 2026
Sunny Weather
Day 61°
Night 45°
Precipitation 5 %
Wind 12 mph
UV Index (0 - 11+) 9
Weather Forecast History
Last Year's Weather on This Day (April 21, 2025)
Cloudy Weather

Day

73°

Night

50°

Wind

7 mph

UV Index

9

Precipitation

1 %