Yes

you do need a jacket based on the weather in Ottawa, ON, Canada 47 seconds ago

Why? Because it's FREEZING out there!
18°F-8°C & Cloudy

Wind is 4 mph7 km/h from the Southwest, gusting to 11 mph18 km/h
February 6
9pm19°F-7°C5 mph8 km/h SouthwestMostly Cloudy
10pm19°F-7°C6 mph10 km/h SouthwestMostly Cloudy
11pm21°F-6°C7 mph11 km/h SouthwestPartly Cloudy
February 7
12am21°F-6°C8 mph12 km/h SouthwestMostly Cloudy
1am24°F-5°C8 mph13 km/h WestCloudy
2am27°F-3°C11 mph17 km/h WestSnow
3am27°F-3°C13 mph21 km/h WestSnow
4am25°F-4°C14 mph22 km/h WestMostly Cloudy
5am22°F-6°C14 mph23 km/h WestPartly Cloudy
6am19°F-7°C14 mph23 km/h WestPartly Cloudy
7am17°F-8°C14 mph22 km/h WestPartly Cloudy
8am16°F-9°C13 mph21 km/h WestMostly Cloudy
DateLowHighWindDayNight
February 6-0°F-18°C21°F-6°C5 mph9 km/h from EastHeavy SnowSnow
February 712°F-11°C27°F-3°C14 mph22 km/h from WestPartly CloudyPartly Cloudy
February 87°F-14°C23°F-5°C3 mph5 km/h from SouthwestMostly CloudyCloudy
February 910°F-12°C25°F-4°C4 mph6 km/h from WestMostly CloudyPartly Cloudy
February 104°F-15°C19°F-7°C6 mph9 km/h from WestPartly CloudyMostly Cloudy
February 110°F-18°C26°F-4°C6 mph10 km/h from SouthwestMostly CloudyMostly Cloudy
February 12-1°F-18°C20°F-6°C5 mph7 km/h from NorthwestMostly CloudyCloudy

Yes

Low of 11°F-12°C, High of 28°F-3°C
Wind: 14 mph22 km/h
Precipitation: None

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