5-day weather forecast for Rancho Cucamonga, California
Today
41°
62°
Mostly sunny
Wednesday
44°
68°
Mostly sunny
Thursday
45°
66°
Patchy Fog
Friday
43°
65°
Mostly sunny
Saturday
45°
67°
Sunny
Click on a forecast to see the forecast trend for that day
Weather forecast accuracy for Ontario, California
| National Weather Service | 82.80% |
| The Weather Channel | 82.35% |
| Intellicast | 81.92% |
| NWS Digital Forecast | 80.33% |
| Accuweather | 77.56% |
| MyForecast | 75.86% |
| Accuweather | 81.82% |
| The Weather Channel | 80.94% |
| MyForecast | 80.69% |
| NWS Digital Forecast | 80.07% |
| Intellicast | 80.07% |
ForecastAdvisor Fact
On average, Accuweather's low temperature forecasts for Ontario were off by 2.87 degrees last year.