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Rancho Cucamonga, California Weather:
Saturday, March 21, 2026
Cloudy Weather
Day 70°
Night 46°
Precipitation 0 %
Wind 6 mph
Weather Forecast History
Last Year's Weather on This Day (March 21, 2025)
Cloudy Weather

Day

77°

Night

50°

Wind

6 mph

UV Index

7

Precipitation

0 %