Cornwall weather
Loading live data…Cloudy,much the same tomorrow
Env. Canada, the European and the American model put Cornwall's high today between 20° and 24°, a 4° split. Tomorrow looks clear around 23°, with a 6% chance of rain.
The weather map: all three models at once
Env. Canada, European, American side by side around Cornwall and nearby towns.Live rain radar →Next 14 hours
consensus of the three models14-day forecast
where the models agree, and where they splitCornwall, Ontario is at its warmest in Jul (average highs near 27°C) and coldest in Feb (lows around -9°C), with roughly 1129 mm of precipitation across the year. Below, compare what Env. Canada, European, American forecast for Cornwall 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 Canada before you trust any single number.
Cornwall climate by month
average daytime high and overnight low across a typical yearWhich forecast is most accurate in Cornwall?
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 1302 cities. Lower error means a higher score. See which forecast model is most accurate in Canada, how we measure forecast accuracy, or which model each weather app uses.
Where the models disagree
temperature and rain, judged separatelyThe models often agree on temperature and still split on rain — and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.