Ontario, California Weather:
Wednesday, March 4, 2026
Partly Sunny with Showers
Day 81°
Night 54°
Precipitation 57 %
Wind 2 mph
UV Index (0 - 11+) 5
Weather Forecast History
Last Year's Weather on This Day (March 4, 2025)
Cloudy Weather

Day

66°

Night

45°

Wind

6 mph

UV Index

5

Precipitation

0 %