Fullerton, California Weather:
Saturday, September 26, 2026
Sunny Weather
Day 88°
Night 66°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (September 26, 2025)
Rainy Weather

Day

72°

Night

66°

Wind

5 mph

Precipitation

55 %