Fontana, California Weather:
Sunday, May 17, 2026
Sunny Weather
Day 82°
Night 57°
Precipitation 25 %
Wind 6 mph
Weather Forecast History
Last Year's Weather on This Day (May 17, 2025)
Cloudy Weather

Day

64°

Night

57°

Wind

9 mph

UV Index

3

Precipitation

25 %