Yes

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

Why? Because it's quite chilly!
36°F2°C & Mostly Clear

Wind is 3 mph5 km/h from the Northwest, gusting to 8 mph13 km/h
October 26
10am36°F2°C4 mph6 km/h NorthwestMostly Clear
11am36°F2°C4 mph6 km/h NorthwestClear
12pm37°F3°C4 mph7 km/h NorthwestClear
1pm43°F6°C5 mph8 km/h NorthwestClear
2pm47°F9°C7 mph11 km/h NorthClear
3pm50°F10°C7 mph12 km/h NorthMostly Clear
4pm52°F11°C7 mph11 km/h NorthwestMostly Clear
5pm53°F12°C7 mph12 km/h NorthwestPartly Cloudy
6pm53°F12°C8 mph12 km/h NorthwestMostly Cloudy
7pm53°F12°C8 mph12 km/h NorthwestMostly Cloudy
8pm52°F11°C7 mph12 km/h NorthwestPartly Cloudy
9pm51°F10°C6 mph10 km/h NorthPartly Cloudy
DateLowHighWindDayNight
October 2636°F2°C53°F12°C6 mph10 km/h from NorthwestMostly ClearClear
October 2734°F1°C52°F11°C4 mph7 km/h from NorthPartly CloudyMostly Clear
October 2837°F3°C54°F12°C8 mph12 km/h from NortheastPartly CloudyMostly Cloudy
October 2940°F5°C53°F11°C7 mph11 km/h from NortheastMostly CloudyPartly Cloudy
October 3038°F3°C55°F13°C5 mph9 km/h from NortheastCloudyRain
October 3148°F9°C58°F15°C9 mph14 km/h from EastRainRain
November 145°F7°C58°F14°C10 mph15 km/h from WestPartly CloudyMostly Clear

Yes

Low of 34°F1°C, High of 52°F11°C
Wind: 4 mph7 km/h
Precipitation: None

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