Rancho Cucamonga, California Weather:
Wednesday, September 16, 2026
Cloudy Weather
Day 84°
Night 61°
Precipitation 0 %
Wind 8 mph
UV Index (0 - 11+) 7
Weather Forecast History
Last Year's Weather on This Day (September 16, 2025)
Night

Day

97°

Night

70°

Wind

4 mph

Precipitation

1 %