Grand River South weather
Loading live data…Cloudy,much the same tomorrow
Env. Canada, the European and the American model agree on a high near 23° in Grand River South today. Tomorrow looks cloudy around 23°, with a 0% chance of rain.
The weather map: all three models at once
Env. Canada, European, American side by side around Grand River South and nearby towns.Live rain radar →Next 14 hours
consensus of the three models14-day forecast
where the models agree, and where they splitGrand River South, Ontario is at its warmest in Jul (average highs near 26°C) and coldest in Feb (lows around -6°C), with roughly 960 mm of precipitation across the year. Below, compare what Env. Canada, European, American forecast for Grand River South 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.
Grand River South climate by month
average daytime high and overnight low across a typical yearWhich forecast is most accurate in Grand River South?
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.