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San Mateo, California Weather:
Saturday, March 21, 2026
Cloudy Weather
Day 64°
Night 46°
Precipitation 19 %
Wind 8 mph
Weather Forecast History
Last Year's Weather on This Day (March 21, 2025)
Cloudy Weather

Day

63°

Night

48°

Wind

9 mph

UV Index

6

Precipitation

2 %