Ontario, California Weather:
Wednesday, June 3, 2026
Sunny Weather
Day 81°
Night 52°
Precipitation 49 %
Wind 6 mph
Weather Forecast History
Last Year's Weather on This Day (June 3, 2025)
Sunny with a Chance of Thunderstorms

Day

77°

Night

59°

Wind

7 mph

UV Index

12

Precipitation

40 %