Yes

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

Why? Because it's pretty chilly.
51°F11°C & Cloudy

Wind is 10 mph16 km/h from the N, gusting to 18 mph29 km/h
March 28
2pm52°F11°C11 mph18 km/h NDrizzle
3pm52°F11°C10 mph17 km/h NRain
4pm52°F11°C11 mph17 km/h NDrizzle
5pm51°F11°C10 mph17 km/h NDrizzle
6pm50°F10°C9 mph15 km/h NCloudy
7pm49°F9°C9 mph14 km/h NCloudy
8pm48°F9°C9 mph14 km/h NCloudy
9pm47°F8°C8 mph13 km/h NWCloudy
10pm46°F8°C10 mph15 km/h NWCloudy
11pm45°F7°C9 mph15 km/h NWMostly Cloudy
March 29
12am44°F7°C11 mph17 km/h NWMostly Cloudy
1am42°F6°C11 mph17 km/h NWMostly Cloudy
DateLowHighWindDayNight
March 2844°F7°C52°F11°C8 mph13 km/h from NRainPartly Cloudy
March 2937°F3°C55°F13°C16 mph25 km/h from NWWindyClear
March 3036°F2°C58°F15°C8 mph13 km/h from WMostly CloudyMostly Cloudy
March 3148°F9°C62°F17°C11 mph17 km/h from NWMostly CloudyDrizzle
April 142°F6°C49°F9°C9 mph14 km/h from ERainRain
April 243°F6°C56°F13°C7 mph11 km/h from ERainDrizzle
April 342°F6°C60°F16°C13 mph21 km/h from WMostly CloudyRain

Yes

Low of 37°F3°C, High of 55°F13°C
Wind: 16 mph25 km/h
Precipitation: None

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