Yes

you do need a jacket based on the weather in Livermore Falls, ME 04254, USA 1 second ago

Why? Because it's not very warm out.
56°F13°C & Partly Cloudy

Wind is 6 mph10 km/h from the SE, gusting to 10 mph16 km/h
April 18
5pm55°F13°C7 mph11 km/h SEPartly Cloudy
6pm53°F12°C7 mph11 km/h SMostly Cloudy
7pm50°F10°C6 mph10 km/h SMostly Cloudy
8pm46°F8°C5 mph9 km/h SMostly Cloudy
9pm44°F7°C5 mph8 km/h SMostly Cloudy
10pm43°F6°C4 mph6 km/h SWMostly Cloudy
11pm42°F6°C3 mph6 km/h SWCloudy
April 19
12am41°F5°C3 mph5 km/h SWCloudy
1am41°F5°C3 mph4 km/h SWCloudy
2am40°F5°C3 mph4 km/h SWCloudy
3am39°F4°C2 mph4 km/h SWMostly Cloudy
4am39°F4°C2 mph4 km/h SMostly Cloudy
DateLowHighWindDayNight
April 1832°F-0°C57°F14°C5 mph8 km/h from SEPartly CloudyMostly Cloudy
April 1938°F3°C57°F14°C9 mph15 km/h from SMostly CloudyCloudy
April 2040°F5°C55°F13°C6 mph10 km/h from WCloudyMostly Clear
April 2136°F2°C53°F12°C8 mph13 km/h from WPartly CloudyMostly Clear
April 2233°F1°C52°F11°C9 mph15 km/h from NWMostly ClearClear
April 2329°F-1°C60°F16°C8 mph14 km/h from SPartly CloudyMostly Cloudy
April 2435°F2°C58°F14°C7 mph11 km/h from WDrizzlePartly Cloudy

Yes

Low of 37°F3°C, High of 57°F14°C
Wind: 9 mph15 km/h
Precipitation: None

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