- Clothing
- Warm jacket and comfortable layers recommended.
Tomorrow's Weather Forecast - Montreal
Tomorrow's weather in Montreal. high 21°C (70°F), low 9°C (48°F). Overcast.
Tomorrow’s Outlook
Tomorrow will be 6°C warmer than today. Mild conditions with dry weather expected all day. Humidity sits at a moderate 69%, so the air shouldn't feel unusually damp or dry. A light breeze near 15 km/h is expected. Sunrise is at 6:29 AM and sunset at 7:11 PM, for about 12h 42m of daylight.
- Tomorrow
- 21°/ 9°
- Today15° / 9°
Tomorrow’s Hourly Weather Outlook
Morning6 AM – Noon13°
- Rain probability
- 0%
- Wind speed
- 11 km/h
AfternoonNoon – 6 PM20°
- Rain probability
- 0%
- Wind speed
- 14 km/h
Evening6 PM – Midn17°
- Rain probability
- 3%
- Wind speed
- 15 km/h
NightMidn – 6 AM11°
- Rain probability
- 0%
- Wind speed
- 10 km/h
24-Hour Rain & Temperature Forecast
Tomorrow12 Sep
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Planning Advice for Tomorrow
- Outdoor
- Good conditions for outdoor activities.
- Travel
- Standard travel conditions expected.
Sunrise & Sunset
Sunrise
Dawn 5:59 AMTotal Daylight
Full day forecastSolar noon 12:50 PM
Sunset
Dusk 7:41 PMvs today-3 min daylight
Sunrise shift1 min later
Sunset shift1 min earlier
5-Day Weather Forecast
Full 15-Day ForecastWeather Insight
Montreal is forecast to reach a high of 21°C tomorrow, with an overnight low around 9°C. That's 1° below the long-term average high of 22°C for this time of year. It continues a recent pattern — 6 of the last 28 days with published data have run cooler than normal. Expect little chance of rain (3% probability) and a gentle breeze averaging 15 km/h. Air quality is currently Moderate (AQI 53), driven mainly by PM2.5 at 9.1 μg/m³.
Today vs Normal
15°C-8° below normal
The long-term average high for today is 23°C.
6 of the last 28 days with published data ran above normal.
It continues that pattern - today's forecast is also running below normal.
Red = above normal, blue = at or below · last 12 days
Air Quality
Air Quality
Moderate
Air quality is acceptable for most people. Unusually sensitive individuals should consider reducing prolonged or heavy outdoor exertion.