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Ontario, California Weather:
Sunday, January 4, 2026
Rainy Weather
Day 61°
Night 45°
Precipitation 55 %
Wind 2 mph
UV Index (0 - 11+) 1
Weather Forecast History
Last Year's Weather on This Day (January 4, 2025)
Cloudy Weather

Day

61°

Night

43°

Wind

4 mph

UV Index

3

Precipitation

40 %