Cloudy,much the same tomorrow
Env. Canada, the European and the American model put Lac-Megantic's high today between 17° and 19°, a 2° split. Tomorrow looks clear around 21°, with a 6% chance of rain.
Lac-Megantic, Quebec is at its warmest in Jul (average highs near 24°C) and coldest in Feb (lows around -12°C), with roughly 1224 mm of precipitation across the year. Below, compare what Env. Canada, European, American forecast for Lac-Megantic right now, and see exactly where they disagree.
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The 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.