Ontario, California Weather:
Tuesday, May 5, 2026
Rainy Weather
Day 73°
Night 54°
Precipitation 59 %
Wind 6 mph
UV Index (0 - 11+) 7
Weather Forecast History
Last Year's Weather on This Day (May 5, 2025)
Cloudy Weather

Day

61°

Night

55°

Wind

7 mph

UV Index

4

Precipitation

25 %