Rancho Cucamonga, California Weather:
Sunday, December 20, 2026
Rainy Weather
Day 61°
Night 46°
Precipitation 0 %
Wind 4 mph
Weather Forecast History
Last Year's Weather on This Day (December 20, 2025)
Cloudy Night

Day

66°

Night

48°

Wind

4 mph

Precipitation

0 %