5-day weather forecast for Ontario, California
Today
54°
72°
Partly Sunny
Friday
54°
75°
Partly Sunny
Saturday
54°
73°
Partly Sunny
Sunday
54°
73°
Mostly Cloudy
Monday
55°
76°
Mostly Cloudy
Click on a forecast to see the forecast trend for that day
Weather changeability for Ontario, California
| Temperature | Last Month | Last Year |
|---|---|---|
| Average change in high temperature day-to-day | 5.6° | 4.7° |
| Average change in low temperature day-to-day | 3.0° | 3.9° |
| Precipitation | Last Month | Last Year |
|---|---|---|
| Chance of dry day after a precip day | 0% | 57% |
| Chance of precip day after a dry day | 0% | 6% |
Weather forecast accuracy for Ontario, California
| CustomWeather | 83.05% |
| NWS Digital Forecast | 82.18% |
| The Weather Channel | 81.61% |
| Intellicast | 81.61% |
| AccuWeather | 81.03% |
| National Weather Service | 80.17% |
| Weather Underground | 79.60% |
| Persistence | 71.34% |
| World Weather Online | 63.79% |
| The Weather Channel | 82.21% |
| Intellicast | 82.09% |
| National Weather Service | 80.95% |
| NWS Digital Forecast | 80.47% |
| AccuWeather | 78.63% |
| CustomWeather | 76.68% |
| Persistence | 63.47% |
ForecastAdvisor Fact
59.8% of Weather Underground's high temperature forecasts for Ontario were within 3 degrees of actual temperatures last month.