Costa Mesa, California Weather:
Monday, September 7, 2026
Cloudy Weather
Day 75°
Night 70°
Precipitation 1 %
Wind 4 mph
UV Index (0 - 11+) 5
Weather Forecast History
Last Year's Weather on This Day (September 7, 2025)
Cloudy Night

Day

81°

Night

64°

Wind

5 mph

Precipitation

0 %