Rancho Cucamonga, California Weather:
Monday, September 14, 2026
Cloudy Weather
Day 88°
Night 66°
Precipitation %
Weather Forecast History
Last Year's Weather on This Day (September 14, 2025)
Partly Sunny with Showers

Day

88°

Night

61°

Wind

6 mph

UV Index

70

Precipitation

49 %