Yes

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

Why? Because it's cold enough that makes you wish you had a hat, but you're still too proud to admit it and the wind is harsh and biting!
34°F1°C & Cloudy

Wind is 9 mph15 km/h from the Southeast, gusting to 19 mph31 km/h
December 27
11am35°F1°C10 mph16 km/h SoutheastCloudy
12pm35°F2°C10 mph16 km/h EastCloudy
1pm36°F2°C9 mph15 km/h EastCloudy
2pm36°F2°C10 mph16 km/h EastCloudy
3pm36°F2°C10 mph15 km/h EastCloudy
4pm35°F2°C10 mph15 km/h EastCloudy
5pm35°F1°C10 mph16 km/h EastCloudy
6pm34°F1°C10 mph16 km/h EastCloudy
7pm34°F1°C10 mph17 km/h EastCloudy
8pm33°F1°C10 mph17 km/h EastCloudy
9pm33°F1°C10 mph16 km/h EastCloudy
10pm33°F0°C10 mph16 km/h EastCloudy
DateLowHighWindDayNight
December 2729°F-2°C36°F2°C9 mph14 km/h from EastCloudyCloudy
December 2834°F1°C44°F7°C5 mph9 km/h from SoutheastCloudyCloudy
December 2936°F2°C45°F7°C7 mph12 km/h from NortheastRainRain
December 3035°F2°C42°F6°C11 mph18 km/h from WestCloudyMostly Cloudy
December 3132°F-0°C39°F4°C4 mph6 km/h from EastDrizzleDrizzle
January 131°F-1°C38°F3°C10 mph17 km/h from NorthwestDrizzleMostly Cloudy
January 224°F-4°C31°F-0°C12 mph19 km/h from WestMostly CloudyMostly Cloudy

Yes

Low of 34°F1°C, High of 45°F7°C
Wind: 5 mph9 km/h
Precipitation: None

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