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Ontario, California Weather:
Monday, January 5, 2026
Rainy Weather
Day 61°
Night 46°
Precipitation 55 %
Wind 4 mph
UV Index (0 - 11+) 1
Weather Forecast History
Last Year's Weather on This Day (January 5, 2025)
Cloudy Weather

Day

73°

Night

46°

Wind

4 mph

UV Index

3

Precipitation

0 %