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Fullerton, California Weather:
Thursday, January 15, 2026
Sunny Weather
Day 84°
Night 50°
Precipitation 1 %
Wind 6 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (January 15, 2025)
Sunny Weather

Day

73°

Night

43°

Wind

9 mph

UV Index

3

Precipitation

0 %