Fullerton, California Weather:
Saturday, October 17, 2026
Sunny Weather
Day 81°
Night 57°
Precipitation 5 %
Wind 1 mph
UV Index (0 - 11+) 4
Weather Forecast History
Last Year's Weather on This Day (October 17, 2025)
Night

Day

84°

Night

55°

Wind

5 mph

Precipitation

0 %