Rancho Cucamonga, California Weather:
Friday, May 22, 2026
Cloudy Weather
Day 81°
Night 57°
Precipitation 3 %
Wind 7 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (May 22, 2025)
Sunny Weather

Day

88°

Night

57°

Wind

8 mph

UV Index

11

Precipitation

1 %