Rancho Cucamonga, California Weather:
Thursday, December 17, 2026
Rainy Weather
Day 61°
Night 46°
Precipitation 0 %
Wind 5 mph
Weather Forecast History
Last Year's Weather on This Day (December 17, 2025)
Cloudy Night

Day

72°

Night

48°

Wind

6 mph

Precipitation

0 %