Ontario, California Weather:
Friday, April 3, 2026
Sunny Weather
Day 79°
Night 52°
Precipitation 20 %
Wind 1 mph
UV Index (0 - 11+) 8
Weather Forecast History
Last Year's Weather on This Day (April 3, 2025)
Sunny with a Chance of Thunderstorms

Day

63°

Night

45°

Wind

7 mph

UV Index

8

Precipitation

40 %