Ontario, California Weather:
Wednesday, August 12, 2026
Cloudy Weather
Day 88°
Night 64°
Precipitation 1 %
Wind 6 mph
UV Index (0 - 11+) 10
Weather Forecast History
Last Year's Weather on This Day (August 12, 2025)
Cloudy Night

Day

90°

Night

63°

Wind

6 mph

Precipitation

0 %