Ontario, California Weather:
Saturday, April 18, 2026
Rainy Weather
Day 77°
Night 55°
Precipitation 55 %
Wind 5 mph
UV Index (0 - 11+) 5
Weather Forecast History
Last Year's Weather on This Day (April 18, 2025)
Cloudy Weather

Day

59°

Night

46°

Wind

8 mph

UV Index

2

Precipitation

25 %