Yes

you do need a jacket based on the weather in Montreal, QC H4E 2S7, Canada 12 seconds ago

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
34°F1°C & Clear

Wind is 2 mph4 km/h from the Southwest, gusting to 4 mph6 km/h
October 10
7am34°F1°C3 mph4 km/h SouthwestClear
8am35°F2°C2 mph3 km/h SouthwestClear
9am40°F4°C2 mph4 km/h SouthMostly Clear
10am45°F7°C4 mph7 km/h SouthwestMostly Cloudy
11am49°F9°C5 mph8 km/h SouthwestMostly Cloudy
12pm52°F11°C6 mph9 km/h SouthwestMostly Cloudy
1pm54°F12°C6 mph10 km/h SouthwestPartly Cloudy
2pm57°F14°C6 mph9 km/h SouthwestPartly Cloudy
3pm58°F14°C5 mph8 km/h SouthMostly Cloudy
4pm58°F14°C5 mph8 km/h SouthMostly Cloudy
5pm57°F14°C5 mph8 km/h SouthMostly Cloudy
6pm55°F13°C4 mph7 km/h SouthMostly Cloudy
DateLowHighWindDayNight
October 1034°F1°C58°F15°C4 mph7 km/h from SouthPartly CloudyPartly Cloudy
October 1143°F6°C64°F18°C3 mph5 km/h from SoutheastClearClear
October 1246°F8°C66°F19°C7 mph12 km/h from EastPartly CloudyPartly Cloudy
October 1348°F9°C59°F15°C11 mph17 km/h from NortheastDrizzleCloudy
October 1448°F9°C59°F15°C5 mph8 km/h from NorthMostly CloudyMostly Cloudy
October 1544°F7°C54°F12°C6 mph10 km/h from NorthwestCloudyMostly Cloudy
October 1641°F5°C52°F11°C8 mph14 km/h from NorthMostly CloudyMostly Cloudy

Yes

Low of 43°F6°C, High of 64°F18°C
Wind: 3 mph5 km/h
Precipitation: None

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