Yes

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

Why? Because it's cold. simple as that.
46°F8°C & Cloudy

Wind is 4 mph6 km/h from the S, gusting to 11 mph18 km/h
April 20
12am46°F8°C4 mph7 km/h SCloudy
1am47°F8°C4 mph6 km/h SCloudy
2am47°F8°C4 mph6 km/h SWCloudy
3am47°F9°C4 mph7 km/h SWCloudy
4am48°F9°C4 mph7 km/h SWCloudy
5am48°F9°C4 mph7 km/h SWCloudy
6am48°F9°C4 mph7 km/h WDrizzle
7am49°F9°C4 mph7 km/h WDrizzle
8am49°F10°C4 mph7 km/h WCloudy
9am50°F10°C4 mph7 km/h WCloudy
10am51°F11°C5 mph7 km/h NWCloudy
11am53°F12°C5 mph8 km/h NWMostly Cloudy
DateLowHighWindDayNight
April 1941°F5°C53°F12°C3 mph4 km/h from SECloudyDrizzle
April 2041°F5°C63°F17°C8 mph13 km/h from WDrizzleMostly Clear
April 2134°F1°C51°F11°C7 mph12 km/h from WCloudyPartly Cloudy
April 2235°F2°C56°F13°C8 mph12 km/h from NWClearClear
April 2335°F2°C62°F17°C8 mph13 km/h from SPartly CloudyMostly Cloudy
April 2441°F5°C55°F13°C9 mph15 km/h from WRainFreezingdrizzle
April 2528°F-2°C56°F13°C9 mph14 km/h from NWMostly ClearMostly Clear

Yes

Low of 41°F5°C, High of 63°F17°C
Wind: 8 mph13 km/h
Precipitation: 39% rain

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