Partly Sunny today in Ontario, CA, with a high near 90 and a low around 72. Sunday looks mostly sunny, with a high near 90. Over the next 8 days, highs range from 72 to 101 with overnight lows from 65 to 73.

The National Weather Service 7-day forecast for your location, with daily and hourly temperature, chance of precipitation, wind, and conditions.

Data type: Weather forecast chart