Yes

you do need a jacket based on the weather in Summit, NJ, USA 1 second ago

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet and it's windy enough to give you a brand new hairdo!
34°F1°C & Mostly Clear

Wind is 11 mph18 km/h from the Northwest, gusting to 24 mph38 km/h
January 5
4pm34°F1°C10 mph17 km/h NorthwestClear
5pm32°F0°C8 mph14 km/h NorthwestClear
6pm31°F-1°C8 mph13 km/h NorthwestMostly Clear
7pm30°F-1°C8 mph12 km/h WestMostly Clear
8pm29°F-2°C7 mph12 km/h WestPartly Cloudy
9pm28°F-2°C7 mph12 km/h WestPartly Cloudy
10pm27°F-3°C7 mph12 km/h WestMostly Cloudy
11pm26°F-3°C7 mph11 km/h WestCloudy
January 6
12am26°F-3°C6 mph10 km/h WestCloudy
1am26°F-3°C6 mph9 km/h WestCloudy
2am26°F-4°C5 mph8 km/h WestCloudy
3am26°F-3°C5 mph8 km/h WestCloudy
DateLowHighWindDayNight
January 525°F-4°C34°F1°C8 mph13 km/h from WestPartly CloudyMostly Cloudy
January 624°F-4°C32°F-0°C4 mph6 km/h from NorthSnowPartly Cloudy
January 720°F-7°C32°F-0°C15 mph24 km/h from NorthwestWindyMostly Clear
January 820°F-7°C29°F-2°C14 mph22 km/h from NorthwestClearMostly Clear
January 918°F-8°C31°F-0°C16 mph25 km/h from NorthwestWindyMostly Clear
January 1023°F-5°C39°F4°C9 mph14 km/h from NorthwestMostly ClearMostly Cloudy
January 1127°F-3°C37°F3°C6 mph10 km/h from NorthSnowSnow

Yes

Low of 24°F-5°C, High of 32°F-0°C
Wind: 4 mph6 km/h
Precipitation: 51% snow

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