Rancho Cucamonga, California Weather:
Tuesday, March 17, 2026
Sunny Weather
Day 70°
Night 45°
Precipitation 5 %
Wind 2 mph
UV Index (0 - 11+) 6
Weather Forecast History
Last Year's Weather on This Day (March 17, 2025)
Partly Sunny with Showers

Day

66°

Night

43°

Wind

8 mph

UV Index

6

Precipitation

87 %