Yes

you do need a jacket based on the weather in Mississauga (Malton), Ontario, Canada 1 second ago

Why? Because a jacket will keep you cozy, but you won't break a seat!
51°F11°C & Mostly Clear

Wind is 1 mph2 km/h from the South, gusting to 5 mph8 km/h
September 5
3am51°F11°C2 mph4 km/h SouthMostly Clear
4am51°F10°C2 mph4 km/h SouthwestMostly Clear
5am51°F11°C3 mph5 km/h SoutheastMostly Clear
6am52°F11°C4 mph7 km/h SoutheastPartly Cloudy
7am54°F12°C5 mph8 km/h SouthMostly Cloudy
8am57°F14°C8 mph13 km/h SouthMostly Clear
9am61°F16°C11 mph18 km/h SouthMostly Clear
10am64°F18°C14 mph22 km/h SouthPartly Cloudy
11am67°F19°C16 mph25 km/h SouthWindy
12pm68°F20°C16 mph25 km/h SouthWindy
1pm69°F21°C18 mph29 km/h SouthwestWindy
2pm70°F21°C18 mph28 km/h SouthwestWindy
DateLowHighWindDayNight
September 550°F10°C73°F23°C15 mph24 km/h from SouthwestPartly CloudyMostly Cloudy
September 652°F11°C67°F19°C9 mph15 km/h from WestMostly CloudyPartly Cloudy
September 751°F10°C64°F18°C10 mph16 km/h from WestDrizzleClear
September 848°F9°C67°F19°C7 mph11 km/h from WestMostly ClearMostly Clear
September 949°F10°C71°F21°C7 mph11 km/h from SouthMostly ClearPartly Cloudy
September 1055°F13°C74°F23°C6 mph9 km/h from SouthwestMostly CloudyMostly Cloudy
September 1151°F11°C65°F18°C9 mph14 km/h from NorthPartly CloudyClear

Yes

Low of 52°F11°C, High of 67°F20°C
Wind: 9 mph15 km/h
Precipitation: None

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