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Fullerton, California Weather:
Saturday, January 3, 2026
Partly Sunny with Showers
Day 64°
Night 46°
Precipitation 57 %
Wind 6 mph
UV Index (0 - 11+) 1
Weather Forecast History
Last Year's Weather on This Day (January 3, 2025)
Cloudy Weather

Day

59°

Night

46°

Wind

4 mph

UV Index

2

Precipitation

0 %