Interactive weather forecasts, historical data graphs, and multi-city comparisons. Zoom from yearly overview to hourly detail.
This application requires JavaScript to display interactive weather graphs and maps. Please enable JavaScript in your browser settings for the full experience.
Browse all locations — view weather forecasts and historical data for cities worldwide.
Ontario is a city of approximately 171,000 people in California, United States. Located in the Pacific Time Zone at 34.1°N latitude.
View historical weather for Ontario · More cities in California