Montreal’s weather today will keep you on your toes with a mix of sun and cloud, along with a 60% chance of showers. It’s cooler than usual for early September, with a high of just 15°C. Winds from the southwest will be blowing at a brisk 30 km/h, gusting up to 50 km/h, so it’s definitely a day for a windbreaker! As the evening rolls in, the rain will clear, leaving a cool night with temperatures dipping to 9°C.

Clear Skies and Rising Temperatures Coming Soon

Tomorrow, Monday, September 9, expect mainly sunny skies and slightly warmer weather, with a high of 19°C. Winds will still be from the southwest, gusting to 40 km/h, but the UV index will be moderate, so don’t forget the sunscreen if you’re outdoors. Temperatures at night will drop to a clear and crisp 10°C.

The rest of the week looks fantastic, with Tuesday and Wednesday both bringing sunny skies and highs of 20°C and 25°C respectively. By Thursday, September 12, temperatures will climb further to a lovely 26°C, perfect for late-summer strolls.

Record Temps and Fun Facts for September 8

Historically, the highest temperature recorded on this date in Montreal was 30.6°C in 2018, while the lowest was a chilly 9.4°C in 2024. So, today’s high of 15°C is notably below the seasonal average of 21°C.

Wardrobe tip: You’ll want to layer up with something waterproof for today, but be ready to enjoy lighter clothing for the sunny days ahead.

Weather Trivia: Montreal’s Frost-Free Days

Did you know that on average, Montreal’s first frost doesn’t occur until mid-October? The city enjoys about 165 frost-free days a year, giving plenty of time for those late-season garden projects!