Rancho Cucamonga, California Weather:
Tuesday, September 8, 2026
Sunny Weather
Day 97°
Night 68°
Precipitation 5 %
Wind 1 mph
UV Index (0 - 11+) 8
Weather Forecast History
Last Year's Weather on This Day (September 8, 2025)
Cloudy Night

Day

91°

Night

61°

Wind

6 mph

Precipitation

0 %