Yes

you do need a jacket based on the weather in Montreal, QC, Canada 2 minutes ago

Why? Because too cold for just a hoodie, too warm for a parka!
49°F10°C & Cloudy

Wind is 7 mph12 km/h from the West, gusting to 14 mph22 km/h
October 25
9pm48°F9°C7 mph11 km/h WestPartly Cloudy
10pm46°F8°C6 mph10 km/h WestMostly Cloudy
11pm45°F7°C6 mph9 km/h NorthwestMostly Cloudy
October 26
12am44°F6°C5 mph8 km/h NorthwestMostly Cloudy
1am42°F6°C5 mph9 km/h NorthwestMostly Cloudy
2am41°F5°C5 mph8 km/h NorthwestMostly Cloudy
3am41°F5°C5 mph7 km/h NorthwestMostly Cloudy
4am40°F4°C4 mph7 km/h NorthwestMostly Cloudy
5am40°F4°C4 mph6 km/h NorthwestMostly Cloudy
6am39°F4°C4 mph6 km/h NorthwestPartly Cloudy
7am38°F3°C4 mph6 km/h NorthwestMostly Cloudy
8am38°F3°C4 mph7 km/h NorthwestPartly Cloudy
DateLowHighWindDayNight
October 2540°F4°C51°F10°C6 mph9 km/h from WestPartly CloudyMostly Cloudy
October 2637°F3°C50°F10°C4 mph6 km/h from NorthwestMostly CloudyMostly Cloudy
October 2738°F4°C51°F10°C5 mph8 km/h from NortheastMostly CloudyPartly Cloudy
October 2838°F3°C52°F11°C7 mph11 km/h from NortheastMostly ClearMostly Clear
October 2936°F2°C53°F12°C5 mph8 km/h from NortheastMostly ClearMostly Clear
October 3037°F3°C53°F12°C7 mph11 km/h from EastRainRain
October 3144°F6°C53°F12°C12 mph19 km/h from NortheastRainRain

Yes

Low of 37°F3°C, High of 50°F10°C
Wind: 4 mph6 km/h
Precipitation: None

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