Yes

you do need a jacket based on the weather in Toronto, ON, Canada 1 minute ago

Why? Because it's quite chilly!
43°F6°C & Partly Cloudy

Wind is 5 mph8 km/h from the NW, gusting to 11 mph18 km/h
October 16
10pm43°F6°C5 mph8 km/h NWPartly Cloudy
11pm42°F6°C5 mph8 km/h NWMostly Clear
October 17
12am41°F5°C5 mph8 km/h NWMostly Clear
1am40°F5°C5 mph8 km/h NWMostly Clear
2am40°F4°C5 mph8 km/h NWMostly Clear
3am39°F4°C5 mph7 km/h NWMostly Clear
4am38°F4°C5 mph7 km/h NWMostly Clear
5am38°F3°C5 mph7 km/h NWMostly Clear
6am37°F3°C5 mph8 km/h NWMostly Clear
7am37°F3°C5 mph8 km/h NWMostly Clear
8am37°F3°C4 mph7 km/h NWClear
9am40°F4°C4 mph6 km/h NWClear
DateLowHighWindDayNight
October 1639°F4°C53°F12°C6 mph10 km/h from NWPartly CloudyMostly Clear
October 1737°F3°C57°F14°C5 mph8 km/h from SWClearClear
October 1840°F5°C62°F17°C4 mph7 km/h from SWClearClear
October 1944°F7°C65°F18°C5 mph8 km/h from SWClearClear
October 2046°F8°C68°F20°C7 mph12 km/h from SWMostly ClearClear
October 2151°F11°C69°F21°C7 mph11 km/h from SWClearClear
October 2249°F10°C67°F20°C5 mph8 km/h from SPartly CloudyMostly Cloudy

Yes

Low of 37°F3°C, High of 57°F14°C
Wind: 5 mph8 km/h
Precipitation: None

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