Montreal weather
Loading live data…Cloudy,much the same tomorrow
Env. Canada, the European and the American model put Montreal's high today between 19° and 23°, a 3° split. Tomorrow looks cloudy around 23°, with a 10% chance of rain.
Latest for Montreal: Env. Canada (GEM model): 17° Clear · European (ECMWF): 18° Clear · American (NOAA GFS): 17° Mainly clear.
The weather map: all three models at once
Env. Canada, European, American side by side around Montreal and nearby towns.Live rain radar →Next 14 hours
consensus of the three models14-day forecast
where the models agree, and where they splitMontreal, Quebec. Below we compare what Env. Canada, European, American forecast for Montreal right now and flag exactly where they disagree, then break down Montreal's weather month by month and which forecast model has been most accurate here.
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.
Montreal weather by month
what to expect in Montreal through the yearHere is Montreal's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Montreal by season.
What Montreal's weather is like through the year
Montreal runs from warm summers, with July highs near 25°C, to cold winters, when February lows sit around -12°C (a swing of about 37°C across the year). August is usually the wettest month, and Montreal sees roughly 1229 mm of precipitation annually. Overnight lows stay below freezing across 5 months (January, February, March, November and December), so Montreal sees regular winter snowfall.
Best time to visit Montreal
The most comfortable time to visit Montreal is usually May, June, July and September, when daytime highs sit in the pleasant 16-26°C range and the heaviest August rain is behind you.
Which forecast is most accurate in Montreal?
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.
Bottom line: over the last 30 days the European model has been the most accurate forecast for Montreal, scoring 93/100 on our CheckWeather Score, ahead of the Env. Canada at 81. See the full CA accuracy scoreboard for exactly how every model is tested.
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.