Fullerton, California Weather:
Sunday, October 18, 2026
Cloudy Weather
Day 84°
Night 63°
Precipitation 25 %
Wind 2 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (October 18, 2025)
Cloudy Night

Day

84°

Night

55°

Wind

4 mph

Precipitation

0 %