Yes

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

Why? Because it's cold enough to freeze the brass off a bald monkey and it's fairly windy outside!
15°F-10°C & Mostly Clear

Wind is 9 mph15 km/h from the Northwest, gusting to 22 mph35 km/h
January 8
12pm15°F-9°C10 mph15 km/h NorthwestPartly Cloudy
1pm16°F-9°C9 mph15 km/h NorthwestMostly Cloudy
2pm17°F-8°C11 mph17 km/h NorthwestMostly Cloudy
3pm17°F-8°C11 mph17 km/h NorthwestMostly Cloudy
4pm17°F-8°C10 mph16 km/h NorthwestMostly Cloudy
5pm17°F-9°C10 mph16 km/h NorthwestMostly Cloudy
6pm16°F-9°C10 mph16 km/h NorthwestMostly Cloudy
7pm15°F-10°C10 mph16 km/h NorthwestPartly Cloudy
8pm14°F-10°C10 mph16 km/h NorthwestMostly Clear
9pm14°F-10°C10 mph16 km/h NorthwestMostly Clear
10pm13°F-10°C9 mph15 km/h NorthwestMostly Clear
11pm13°F-11°C9 mph15 km/h NorthwestPartly Cloudy
DateLowHighWindDayNight
January 810°F-12°C19°F-7°C9 mph14 km/h from NorthwestPartly CloudyMostly Clear
January 912°F-11°C24°F-4°C8 mph14 km/h from NorthwestMostly ClearMostly Clear
January 1015°F-9°C30°F-1°C6 mph10 km/h from SouthwestMostly CloudySnow
January 1125°F-4°C32°F0°C9 mph14 km/h from WestPartly CloudyPartly Cloudy
January 1222°F-5°C31°F-1°C5 mph8 km/h from WestMostly CloudyMostly Cloudy
January 1324°F-4°C32°F-0°C4 mph6 km/h from SouthwestCloudyCloudy
January 1419°F-7°C28°F-2°C11 mph17 km/h from WestMostly CloudyMostly Cloudy

Yes

Low of 12°F-11°C, High of 24°F-5°C
Wind: 8 mph14 km/h
Precipitation: None

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