Ontario, California Weather:
Saturday, November 21, 2026
Cloudy Weather
Day 66°
Night 46°
Precipitation 2 %
Wind 1 mph
UV Index (0 - 11+) 3
Weather Forecast History
Last Year's Weather on This Day (November 21, 2025)
Cloudy Weather

Day

61°

Night

52°

Wind

18 mph

Precipitation

25 %