Yes

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

Why? Because it's pretty chilly.
52°F11°C & Rain

Wind is 10 mph16 km/h from the N, gusting to 17 mph28 km/h
March 28
4pm52°F11°C10 mph16 km/h NDrizzle
5pm51°F11°C10 mph16 km/h NDrizzle
6pm51°F10°C9 mph15 km/h NCloudy
7pm49°F9°C8 mph13 km/h NWCloudy
8pm48°F9°C8 mph14 km/h NCloudy
9pm47°F8°C8 mph13 km/h NWCloudy
10pm46°F8°C9 mph15 km/h NWCloudy
11pm45°F7°C9 mph15 km/h NWMostly Cloudy
March 29
12am44°F7°C10 mph16 km/h NWMostly Cloudy
1am43°F6°C10 mph17 km/h NWMostly Cloudy
2am41°F5°C10 mph17 km/h NWMostly Cloudy
3am40°F5°C11 mph18 km/h NWPartly Cloudy
DateLowHighWindDayNight
March 2844°F7°C53°F12°C8 mph13 km/h from NRainPartly Cloudy
March 2937°F3°C55°F13°C15 mph25 km/h from NWWindyClear
March 3036°F2°C58°F14°C8 mph13 km/h from WMostly CloudyMostly Cloudy
March 3148°F9°C63°F17°C10 mph16 km/h from NWMostly CloudyDrizzle
April 144°F7°C51°F10°C9 mph14 km/h from ERainRain
April 244°F7°C53°F12°C7 mph12 km/h from NERainDrizzle
April 341°F5°C59°F15°C14 mph23 km/h from WMostly CloudyRain

Yes

Low of 37°F3°C, High of 55°F13°C
Wind: 15 mph25 km/h
Precipitation: None

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