Yes

you do need a jacket based on the weather in Cortland, NY 13045, USA 1 second ago

Why? Because the temperature has dropped below freezing and the wind is offering free, unsolicited face massages!
22°F-5°C & Mostly Clear

Wind is 10 mph16 km/h from the South, gusting to 23 mph37 km/h
December 23
4pm22°F-5°C10 mph17 km/h SouthCloudy
5pm22°F-6°C11 mph18 km/h SouthCloudy
6pm23°F-5°C12 mph19 km/h SouthCloudy
7pm23°F-5°C12 mph19 km/h SouthCloudy
8pm22°F-5°C11 mph18 km/h SouthCloudy
9pm22°F-5°C11 mph18 km/h SouthCloudy
10pm22°F-6°C11 mph18 km/h SouthCloudy
11pm22°F-6°C11 mph17 km/h SouthCloudy
December 24
12am21°F-6°C12 mph19 km/h SouthSnow
1am21°F-6°C12 mph19 km/h SouthSnow
2am22°F-6°C11 mph18 km/h SouthSnow
3am22°F-6°C11 mph17 km/h SouthSnow
DateLowHighWindDayNight
December 23-6°F-21°C23°F-5°C8 mph13 km/h from SouthMostly CloudySnow
December 2421°F-6°C33°F0°C7 mph11 km/h from NorthwestCloudyCloudy
December 2517°F-8°C28°F-2°C3 mph4 km/h from NorthwestMostly CloudyMostly Cloudy
December 2616°F-9°C28°F-2°C2 mph4 km/h from EastPartly CloudyMostly Clear
December 2713°F-11°C33°F1°C4 mph6 km/h from SoutheastPartly CloudyMostly Cloudy
December 2827°F-3°C38°F3°C8 mph12 km/h from SoutheastDrizzleCloudy
December 2936°F2°C42°F5°C12 mph19 km/h from SoutheastRainRain

Yes

Low of 21°F-6°C, High of 33°F1°C
Wind: 7 mph11 km/h
Precipitation: None

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