Rancho Cucamonga, California Weather:
Thursday, August 13, 2026
Cloudy Weather
Day 90°
Night 66°
Precipitation 0 %
Wind 5 mph
UV Index (0 - 11+) 9
Weather Forecast History
Last Year's Weather on This Day (August 13, 2025)
Night

Day

90°

Night

61°

Wind

5 mph

Precipitation

0 %