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Fullerton, California Weather:
Saturday, January 17, 2026
Sunny Weather
Day 82°
Night 54°
Precipitation 2 %
Wind 5 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (January 17, 2025)
Cloudy Weather

Day

59°

Night

45°

Wind

6 mph

UV Index

3

Precipitation

2 %