Rancho Cucamonga, California Weather:
Sunday, September 27, 2026
Sunny Weather
Day 90°
Night 64°
Precipitation 20 %
Wind 1 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (September 27, 2025)
Stormy Weather

Day

75°

Night

63°

Wind

6 mph

Precipitation

49 %