Yes

you do need a jacket based on the weather in Leominster, MA, USA 1 second ago

Why? Because it's cold. simple as that.
42°F6°C & Clear

Wind is 4 mph7 km/h from the S, gusting to 12 mph19 km/h
April 27
12am41°F5°C5 mph7 km/h SWClear
1am39°F4°C4 mph7 km/h SWClear
2am37°F3°C4 mph6 km/h SWClear
3am36°F2°C4 mph6 km/h SWClear
4am35°F2°C4 mph6 km/h SWClear
5am34°F1°C4 mph6 km/h WClear
6am34°F1°C4 mph6 km/h WClear
7am37°F3°C3 mph6 km/h WClear
8am44°F7°C4 mph6 km/h WClear
9am50°F10°C3 mph6 km/h WMostly Clear
10am55°F13°C3 mph6 km/h SWMostly Clear
11am59°F15°C4 mph7 km/h SWPartly Cloudy
DateLowHighWindDayNight
April 2630°F-1°C62°F16°C2 mph4 km/h from NEClearClear
April 2734°F1°C66°F19°C5 mph9 km/h from SWPartly CloudyDrizzle
April 2841°F5°C70°F21°C7 mph11 km/h from SWDrizzleMostly Cloudy
April 2954°F12°C74°F24°C6 mph10 km/h from NPartly CloudyMostly Cloudy
April 3046°F8°C62°F17°C6 mph9 km/h from SEDrizzleRain
May 143°F6°C58°F15°C4 mph7 km/h from NEMostly CloudyPartly Cloudy
May 243°F6°C75°F24°C4 mph7 km/h from SWMostly CloudyMostly Cloudy

Yes

Low of 34°F1°C, High of 65°F19°C
Wind: 5 mph9 km/h
Precipitation: None

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