No

you don't need a jacket based on the weather in North York, Toronto, ON, Canada 4 minutes ago

68°F20°C & Clear

Wind is 6 mph9 km/h from the North, gusting to 9 mph14 km/h
September 11
11am70°F21°C5 mph8 km/h NorthClear
12pm73°F23°C4 mph6 km/h NorthClear
1pm75°F24°C4 mph7 km/h NorthClear
2pm76°F25°C4 mph7 km/h NorthClear
3pm77°F25°C3 mph5 km/h NorthClear
4pm76°F25°C3 mph4 km/h NortheastMostly Clear
5pm75°F24°C2 mph4 km/h NortheastMostly Clear
6pm74°F23°C3 mph5 km/h NortheastMostly Clear
7pm71°F22°C3 mph4 km/h NorthMostly Clear
8pm69°F20°C3 mph4 km/h NorthMostly Clear
9pm66°F19°C4 mph7 km/h NorthMostly Clear
10pm64°F18°C5 mph8 km/h NorthMostly Clear
DateLowHighWindDayNight
September 1155°F13°C77°F25°C3 mph6 km/h from NorthClearMostly Clear
September 1257°F14°C73°F23°C5 mph8 km/h from SoutheastPartly CloudyMostly Cloudy
September 1357°F14°C75°F24°C4 mph6 km/h from SouthwestMostly CloudyMostly Clear
September 1460°F15°C76°F25°C3 mph6 km/h from NortheastPartly CloudyMostly Clear
September 1559°F15°C76°F24°C5 mph9 km/h from EastMostly ClearClear
September 1659°F15°C76°F25°C5 mph9 km/h from EastMostly ClearPartly Cloudy
September 1760°F16°C77°F25°C4 mph7 km/h from SoutheastPartly CloudyPartly Cloudy

Yes

Low of 56°F14°C, High of 73°F23°C
Wind: 5 mph8 km/h
Precipitation: None

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