San Marcos, California Weather:
Saturday, September 12, 2026
Cloudy Weather
Day 90°
Night 66°
Precipitation 10 %
Wind 2 mph
UV Index (0 - 11+) 8
Weather Forecast History
Last Year's Weather on This Day (September 12, 2025)
Cloudy Night

Day

79°

Night

61°

Wind

4 mph

Precipitation

1 %