Fullerton, California Weather:
Tuesday, June 30, 2026
Sunny Weather
Day 77°
Night 63°
Precipitation 3 %
Wind 8 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (June 30, 2025)
Sunny Weather

Day

84°

Night

63°

Wind

6 mph

UV Index

12

Precipitation

0 %