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Ontario, California Weather:
Sunday, January 18, 2026
Cloudy Weather
Day 64°
Night 46°
Precipitation 25 %
Wind 5 mph
UV Index (0 - 11+) 1
Weather Forecast History
Last Year's Weather on This Day (January 18, 2025)
Cloudy Weather

Day

63°

Night

39°

Wind

4 mph

UV Index

3

Precipitation

0 %