Yes

you do need a jacket based on the weather in Hackettstown, NJ 07840, USA 1 second ago

Why? Because it's bitterly cold.
43°F6°C & Cloudy

Wind is 2 mph4 km/h from the NW, gusting to 7 mph11 km/h
March 28
7am43°F6°C3 mph4 km/h NDrizzle
8am44°F7°C4 mph6 km/h NCloudy
9am45°F7°C5 mph8 km/h NCloudy
10am46°F8°C7 mph10 km/h NCloudy
11am46°F8°C7 mph12 km/h NDrizzle
12pm47°F8°C8 mph13 km/h NDrizzle
1pm48°F9°C8 mph13 km/h NCloudy
2pm48°F9°C8 mph12 km/h NCloudy
3pm49°F9°C7 mph12 km/h NCloudy
4pm50°F10°C7 mph11 km/h NCloudy
5pm49°F10°C7 mph12 km/h NCloudy
6pm48°F9°C7 mph11 km/h NCloudy
DateLowHighWindDayNight
March 2839°F4°C50°F10°C7 mph11 km/h from NDrizzleMostly Cloudy
March 2932°F-0°C52°F11°C12 mph19 km/h from NWMostly ClearMostly Clear
March 3032°F-0°C56°F13°C8 mph13 km/h from WMostly CloudyMostly Cloudy
March 3139°F4°C56°F14°C9 mph14 km/h from NWMostly CloudyCloudy
April 133°F1°C50°F10°C5 mph9 km/h from SECloudyRain
April 239°F4°C47°F8°C8 mph13 km/h from ERainDrizzle
April 337°F3°C48°F9°C9 mph15 km/h from NWDrizzlePartly Cloudy

Yes

Low of 32°F-0°C, High of 52°F11°C
Wind: 12 mph19 km/h
Precipitation: None

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