Yes

you do need a jacket based on the weather in Cornwall, ON, Canada 1 second ago

Why? Because a jacket will keep you cozy, but you won't break a seat and it's so windy, your hat will probably launch into orbit!
50°F10°C & Mostly Cloudy

Wind is 12 mph20 km/h from the West, gusting to 29 mph47 km/h
November 4
9pm49°F9°C11 mph18 km/h WestClear
10pm46°F8°C8 mph12 km/h WestClear
11pm44°F6°C7 mph11 km/h WestClear
November 5
12am42°F6°C6 mph10 km/h WestClear
1am41°F5°C6 mph10 km/h WestClear
2am40°F4°C7 mph11 km/h SouthwestClear
3am39°F4°C7 mph11 km/h SouthwestClear
4am38°F4°C7 mph11 km/h SouthwestMostly Clear
5am38°F4°C7 mph11 km/h SouthwestPartly Cloudy
6am38°F3°C7 mph11 km/h SouthwestPartly Cloudy
7am38°F3°C7 mph11 km/h SouthwestPartly Cloudy
8am37°F3°C6 mph10 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
November 438°F4°C52°F11°C11 mph18 km/h from WestClearPartly Cloudy
November 537°F3°C46°F8°C7 mph11 km/h from SoutheastRainRain
November 630°F-1°C40°F4°C11 mph17 km/h from WestMostly CloudyPartly Cloudy
November 730°F-1°C48°F9°C6 mph10 km/h from SouthDrizzleDrizzle
November 833°F1°C48°F9°C8 mph13 km/h from NorthwestMostly CloudyMostly Cloudy
November 931°F-0°C38°F3°C8 mph14 km/h from NortheastHeavy SnowSnow
November 1027°F-3°C36°F2°C10 mph16 km/h from WestSnowMostly Cloudy

Yes

Low of 37°F3°C, High of 46°F8°C
Wind: 7 mph11 km/h
Precipitation: 91% rain

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