Yes

you do need a jacket based on the weather in Calgary, AB, Canada 1 second ago

Why? Because time to get cozy, it's freezing out there!
26°F-3°C & Partly Cloudy

Wind is 4 mph7 km/h from the Southwest, gusting to 6 mph9 km/h
January 9
11pm26°F-3°C5 mph7 km/h SouthwestPartly Cloudy
January 10
12am26°F-4°C5 mph7 km/h WestPartly Cloudy
1am26°F-3°C5 mph8 km/h WestPartly Cloudy
2am28°F-2°C5 mph7 km/h WestMostly Cloudy
3am31°F-1°C5 mph8 km/h WestCloudy
4am33°F1°C6 mph9 km/h WestCloudy
5am34°F1°C6 mph9 km/h WestCloudy
6am35°F1°C6 mph9 km/h WestCloudy
7am33°F1°C5 mph8 km/h WestCloudy
8am33°F0°C6 mph9 km/h WestCloudy
9am31°F-0°C6 mph10 km/h WestCloudy
10am31°F-1°C6 mph10 km/h WestMostly Cloudy
DateLowHighWindDayNight
January 919°F-7°C36°F2°C2 mph3 km/h from SouthwestMostly ClearMostly Cloudy
January 1028°F-2°C39°F4°C7 mph11 km/h from WestCloudyMostly Cloudy
January 1128°F-2°C34°F1°C9 mph14 km/h from NorthwestCloudyCloudy
January 1224°F-4°C31°F-0°C7 mph12 km/h from NorthwestMostly CloudyMostly Clear
January 1321°F-6°C37°F3°C7 mph12 km/h from WestPartly CloudyMostly Clear
January 1424°F-5°C40°F5°C5 mph9 km/h from WestPartly CloudyPartly Cloudy
January 1527°F-3°C39°F4°C8 mph12 km/h from WestPartly CloudyPartly Cloudy

Yes

Low of 28°F-2°C, High of 39°F4°C
Wind: 7 mph11 km/h
Precipitation: 19% rain

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