Ontario, California Weather:
Sunday, May 3, 2026
Cloudy Weather
Day 70°
Night 55°
Precipitation 1 %
Wind 6 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (May 3, 2025)
Rainy Weather

Day

61°

Night

55°

Wind

7 mph

UV Index

3

Precipitation

49 %