Yes

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

Why? Because sorry, it's too cool for just a hoodie!
50°F10°C & Mostly Clear

Wind is 7 mph11 km/h from the North, gusting to 17 mph28 km/h
October 17
12am50°F10°C7 mph11 km/h NorthMostly Clear
1am48°F9°C8 mph12 km/h NorthMostly Clear
2am47°F8°C6 mph10 km/h NorthMostly Clear
3am45°F7°C6 mph9 km/h NorthwestMostly Clear
4am44°F7°C6 mph9 km/h NorthMostly Clear
5am44°F7°C6 mph10 km/h NorthMostly Clear
6am43°F6°C5 mph9 km/h NorthMostly Clear
7am42°F6°C5 mph8 km/h NorthwestPartly Cloudy
8am42°F5°C5 mph7 km/h NorthPartly Cloudy
9am41°F5°C4 mph7 km/h NorthwestPartly Cloudy
10am41°F5°C4 mph7 km/h NorthwestPartly Cloudy
11am42°F5°C4 mph6 km/h NorthwestMostly Cloudy
DateLowHighWindDayNight
October 1638°F3°C60°F15°C3 mph5 km/h from NorthClearMostly Clear
October 1741°F5°C55°F13°C3 mph5 km/h from SouthCloudyDrizzle
October 1852°F11°C68°F20°C8 mph13 km/h from SouthMostly CloudyRain
October 1955°F13°C67°F20°C12 mph19 km/h from SouthRainRain
October 2049°F10°C59°F15°C11 mph18 km/h from NorthwestDrizzlePartly Cloudy
October 2146°F8°C57°F14°C11 mph18 km/h from SouthwestDrizzlePartly Cloudy
October 2244°F7°C54°F12°C12 mph19 km/h from WestPartly CloudyMostly Cloudy

Yes

Low of 41°F5°C, High of 55°F13°C
Wind: 3 mph5 km/h
Precipitation: 20% rain

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