San Mateo, California Weather:
Wednesday, May 20, 2026
Cloudy Weather
Day 63°
Night 48°
Precipitation 25 %
Wind 11 mph
Weather Forecast History
Last Year's Weather on This Day (May 20, 2025)
Sunny Weather

Day

72°

Night

50°

Wind

12 mph

UV Index

11

Precipitation

0 %