Ontario, California Weather:
Monday, March 30, 2026
Cloudy Weather
Day 73°
Night 48°
Precipitation 10 %
Wind 1 mph
UV Index (0 - 11+) 7
Weather Forecast History
Last Year's Weather on This Day (March 30, 2025)
Rainy Weather

Day

64°

Night

54°

Wind

8 mph

UV Index

2

Precipitation

49 %