Yes

you do need a jacket based on the weather in Mississauga (Meadowvale Village), Ontario, Canada 1 second ago

Why? Because Jack Frost is nipping at your nose!
17°F-8°C & Cloudy

Wind is 3 mph5 km/h from the South, gusting to 11 mph18 km/h
December 23
5am17°F-8°C3 mph5 km/h SouthCloudy
6am18°F-8°C3 mph5 km/h SouthCloudy
7am19°F-7°C3 mph5 km/h SouthCloudy
8am20°F-7°C4 mph6 km/h SouthCloudy
9am21°F-6°C4 mph6 km/h SouthCloudy
10am24°F-5°C5 mph9 km/h SouthCloudy
11am25°F-4°C7 mph11 km/h SouthCloudy
12pm26°F-3°C9 mph14 km/h SouthSnow
1pm28°F-2°C9 mph14 km/h SouthCloudy
2pm29°F-2°C9 mph14 km/h SouthCloudy
3pm30°F-1°C8 mph12 km/h SouthCloudy
4pm30°F-1°C5 mph9 km/h SouthCloudy
DateLowHighWindDayNight
December 2315°F-10°C32°F-0°C6 mph10 km/h from SouthSnowSnow
December 2426°F-4°C34°F1°C6 mph9 km/h from NorthMostly CloudyMostly Cloudy
December 2524°F-4°C32°F-0°C4 mph6 km/h from EastCloudyCloudy
December 2621°F-6°C33°F1°C5 mph7 km/h from NortheastMostly CloudyMostly Cloudy
December 2722°F-5°C32°F-0°C6 mph9 km/h from EastCloudyDrizzle
December 2830°F-1°C38°F4°C5 mph9 km/h from EastCloudyCloudy
December 2931°F-0°C42°F6°C6 mph9 km/h from SoutheastDrizzleDrizzle

Yes

Low of 26°F-4°C, High of 34°F1°C
Wind: 6 mph9 km/h
Precipitation: None

Support This Page