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Fullerton, California Weather:
Wednesday, January 21, 2026
Cloudy Weather
Day 73°
Night 52°
Precipitation 0 %
Wind 2 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (January 21, 2025)
Cloudy Weather

Day

73°

Night

46°

Wind

11 mph

UV Index

3

Precipitation

0 %