Rancho Cucamonga, California Weather:
Saturday, May 30, 2026
Sunny Weather
Day 75°
Night 54°
Precipitation 5 %
Wind 2 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (May 30, 2025)
Cloudy Weather

Day

97°

Night

68°

Wind

8 mph

UV Index

12

Precipitation

0 %