Costa Mesa, California Weather:
Wednesday, September 2, 2026
Cloudy Weather
Day 82°
Night 70°
Precipitation 3 %
Wind 7 mph
UV Index (0 - 11+) 8
Weather Forecast History
Last Year's Weather on This Day (September 2, 2025)
Night

Day

81°

Night

66°

Wind

5 mph

Precipitation

25 %