Fullerton, California Weather:
Tuesday, September 15, 2026
Cloudy Weather
Day 82°
Night 64°
Precipitation 0 %
Wind 7 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (September 15, 2025)
Night

Day

84°

Night

64°

Wind

5 mph

Precipitation

0 %