Rancho Cucamonga, California Weather:
Friday, May 15, 2026
Sunny Weather
Day 79°
Night 55°
Precipitation 0 %
Wind 7 mph
Weather Forecast History
Last Year's Weather on This Day (May 15, 2025)
Sunny Weather

Day

79°

Night

54°

Wind

7 mph

UV Index

11

Precipitation

1 %