Ontario weather
Loading live data…Latest for Ontario: NWS (National Blend (NBM)): 78° Overcast · American (NOAA GFS): 73° Overcast · European (ECMWF): 70° Light drizzle.
The weather map: all three models at once
NWS, American, European side by side around Ontario and nearby towns.Live rain radar →Next 14 hours
consensus of the three models14-day forecast
where the models agree, and where they splitOntario, CA is at its warmest in Jul (average highs near 94°F) and coldest in Feb (lows around 43°F), with roughly 32 in of precipitation across the year. Below, compare what NWS, American, European forecast for Ontario right now, and see exactly where they disagree.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.
Ontario climate by month
average daytime high and overnight low across a typical yearWhich forecast is most accurate in Ontario?
CheckWeather Score — graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy — each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.