Hamilton weather
Loading live data…Mostly clear,much the same tomorrow
Env. Canada, the European and the American model put Hamilton's high today between 20° and 24°, a 5° split. Tomorrow looks cloudy around 24°, with a 4% chance of rain.
The weather map: all three models at once
Env. Canada, European, American side by side around Hamilton and nearby towns.Live rain radar →Next 14 hours
consensus of the three models14-day forecast
where the models agree, and where they splitHamilton, Ontario. Below we compare what Env. Canada, European, American forecast for Hamilton right now and flag exactly where they disagree, then break down Hamilton'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.
Hamilton weather by month
what to expect in Hamilton through the yearHere is Hamilton'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 Hamilton by season.
What Hamilton's weather is like through the year
Hamilton runs from warm summers, with July highs near 27°C, to cold winters, when February lows sit around -5°C (a swing of about 32°C across the year). July is usually the wettest month, and Hamilton sees roughly 1011 mm of precipitation annually. Overnight lows stay below freezing across 4 months (January, February, March and December), so Hamilton sees regular winter snowfall.
Best time to visit Hamilton
The most comfortable time to visit Hamilton is usually May, June, August and September, when daytime highs sit in the pleasant 16-26°C range and the heaviest July rain is behind you.
Which forecast is most accurate in Hamilton?
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 Hamilton, scoring 93/100 on our CheckWeather Score, ahead of the Env. Canada at 67. 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.