Rancho Cucamonga, California Weather:
Saturday, July 18, 2026
Cloudy Weather
Day 93°
Night 66°
Precipitation 0 %
Wind 9 mph
UV Index (0 - 11+) 11
Weather Forecast History
Last Year's Weather on This Day (July 18, 2025)
Cloudy Weather

Day

86°

Night

63°

Wind

7 mph

UV Index

11

Precipitation

8 %