Yes

you do need a jacket based on the weather in Owen Sound, ON, Canada 1 second ago

Why? Because it's quite chilly!
40°F4°C & Cloudy

Wind is 5 mph8 km/h from the North, gusting to 7 mph11 km/h
April 30
2pm42°F6°C6 mph9 km/h NorthCloudy
3pm43°F6°C6 mph10 km/h NorthCloudy
4pm44°F7°C6 mph10 km/h NorthCloudy
5pm43°F6°C7 mph11 km/h NorthCloudy
6pm43°F6°C7 mph11 km/h NorthMostly Cloudy
7pm41°F5°C6 mph9 km/h NortheastMostly Cloudy
8pm40°F5°C5 mph8 km/h NortheastMostly Cloudy
9pm38°F3°C4 mph7 km/h NortheastMostly Cloudy
10pm36°F2°C4 mph7 km/h EastMostly Cloudy
11pm35°F2°C4 mph6 km/h EastMostly Cloudy
May 1
12am35°F2°C4 mph6 km/h EastMostly Cloudy
1am34°F1°C4 mph6 km/h EastMostly Cloudy
DateLowHighWindDayNight
April 3033°F0°C44°F7°C6 mph9 km/h from NorthCloudyMostly Cloudy
May 134°F1°C57°F14°C9 mph14 km/h from EastRainRain
May 243°F6°C57°F14°C11 mph17 km/h from WestDrizzleMostly Cloudy
May 340°F4°C53°F12°C7 mph11 km/h from NorthwestMostly CloudyMostly Cloudy
May 439°F4°C57°F14°C9 mph14 km/h from NorthPartly CloudyMostly Cloudy
May 542°F6°C64°F18°C10 mph17 km/h from EastPartly CloudyMostly Cloudy
May 651°F11°C65°F18°C7 mph11 km/h from SouthMostly CloudyMostly Cloudy

Yes

Low of 35°F2°C, High of 57°F14°C
Wind: 9 mph14 km/h
Precipitation: 73% rain

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