Rancho Cucamonga, California Weather:
Sunday, June 28, 2026
Cloudy Weather
Day 77°
Night 57°
Precipitation 25 %
Wind 6 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (June 28, 2025)
Sunny Weather

Day

97°

Night

63°

Wind

6 mph

UV Index

12

Precipitation

0 %