Rancho Cucamonga, California Weather:
Saturday, September 5, 2026
Cloudy Weather
Day 95°
Night 70°
Precipitation 1 %
Wind 5 mph
UV Index (0 - 11+) 8
Weather Forecast History
Last Year's Weather on This Day (September 5, 2025)
Night

Day

95°

Night

64°

Wind

5 mph

Precipitation

0 %