Yes

you do need a jacket based on the weather in Toronto, ON, Canada 3 minutes ago

Why? Because just cool enough for a jacket, but not warm enough to ditch it!
56°F13°C & Mostly Clear

Wind is 4 mph7 km/h from the Northwest, gusting to 6 mph10 km/h
September 18
8am58°F15°C3 mph5 km/h NorthwestMostly Cloudy
9am62°F17°C2 mph3 km/h WestPartly Cloudy
10am67°F19°C3 mph4 km/h WestMostly Clear
11am71°F22°C2 mph3 km/h SouthwestPartly Cloudy
12pm73°F23°C5 mph8 km/h SouthMostly Clear
1pm75°F24°C6 mph9 km/h SouthMostly Clear
2pm77°F25°C5 mph8 km/h SouthwestPartly Cloudy
3pm78°F25°C5 mph8 km/h SouthwestMostly Clear
4pm78°F26°C4 mph7 km/h SouthwestMostly Clear
5pm78°F26°C4 mph6 km/h WestMostly Clear
6pm77°F25°C5 mph8 km/h NorthwestMostly Clear
7pm75°F24°C7 mph12 km/h NorthwestClear
DateLowHighWindDayNight
September 1856°F13°C78°F26°C4 mph7 km/h from SouthwestMostly ClearClear
September 1957°F14°C70°F21°C5 mph8 km/h from NorthMostly ClearClear
September 2054°F12°C65°F18°C11 mph18 km/h from EastClearPartly Cloudy
September 2157°F14°C73°F23°C8 mph12 km/h from EastPartly CloudyRain
September 2265°F18°C74°F24°C8 mph13 km/h from SouthwestHeavy RainRain
September 2362°F17°C75°F24°C5 mph9 km/h from SouthwestDrizzlePartly Cloudy
September 2461°F16°C73°F23°C5 mph8 km/h from EastPartly CloudyPartly Cloudy

Yes

Low of 57°F14°C, High of 71°F22°C
Wind: 5 mph8 km/h
Precipitation: None

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