Fontana, California Weather:
Thursday, June 4, 2026
Sunny Weather
Day 79°
Night 54°
Precipitation 10 %
Wind 1 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (June 4, 2025)
Cloudy Weather

Day

81°

Night

59°

Wind

7 mph

UV Index

12

Precipitation

4 %