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Fullerton, California Weather:
Monday, January 19, 2026
Sunny Weather
Day 81°
Night 48°
Precipitation 3 %
Wind 1 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (January 19, 2025)
Cloudy Weather

Day

61°

Night

45°

Wind

4 mph

UV Index

2

Precipitation

0 %