Fullerton, California Weather:
Sunday, May 31, 2026
Sunny Weather
Day 79°
Night 59°
Precipitation 49 %
Wind 6 mph
Weather Forecast History
Last Year's Weather on This Day (May 31, 2025)
Cloudy Weather

Day

90°

Night

63°

Wind

6 mph

UV Index

11

Precipitation

25 %