Yes

you do need a jacket based on the weather in Toronto (Dorset Park), Ontario, Canada 1 second ago

Why? Because it's quite chilly!
34°F1°C & Cloudy

Wind is 3 mph5 km/h from the West, gusting to 9 mph14 km/h
November 7
4am34°F1°C4 mph6 km/h WestCloudy
5am35°F1°C2 mph4 km/h SouthwestCloudy
6am35°F2°C1 mph2 km/h SouthCloudy
7am36°F2°C3 mph4 km/h SouthCloudy
8am36°F2°C4 mph6 km/h SoutheastCloudy
9am37°F3°C7 mph11 km/h SoutheastCloudy
10am39°F4°C8 mph13 km/h SoutheastCloudy
11am42°F6°C10 mph16 km/h SoutheastCloudy
12pm43°F6°C11 mph17 km/h SoutheastCloudy
1pm44°F7°C11 mph18 km/h SoutheastCloudy
2pm45°F7°C11 mph18 km/h SoutheastCloudy
3pm46°F8°C11 mph18 km/h SouthCloudy
DateLowHighWindDayNight
November 634°F1°C45°F7°C4 mph6 km/h from NorthwestPartly CloudyMostly Cloudy
November 735°F1°C51°F10°C11 mph18 km/h from SouthRainPartly Cloudy
November 836°F2°C47°F8°C6 mph10 km/h from NorthwestMostly CloudyDrizzle
November 929°F-2°C36°F2°C13 mph21 km/h from NorthSnowFlurries
November 1024°F-4°C32°F0°C9 mph14 km/h from NorthwestMostly CloudyMostly Cloudy
November 1124°F-5°C35°F2°C12 mph19 km/h from WestSnowSnow
November 1232°F-0°C42°F5°C13 mph20 km/h from WestSnowMostly Cloudy

Yes

Low of 35°F2°C, High of 51°F11°C
Wind: 11 mph18 km/h
Precipitation: 78% rain

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