Yes

you do need a jacket based on the weather in Somerville, MA 02143, USA 1 second ago

Why? Because you're not freezing, but you’ll definitely start complaining if it lasts much longer!
40°F5°C & Clear

Wind is 7 mph11 km/h from the West, gusting to 18 mph29 km/h
November 26
9pm40°F5°C7 mph12 km/h WestClear
10pm40°F4°C7 mph12 km/h WestClear
11pm39°F4°C7 mph12 km/h WestMostly Clear
November 27
12am39°F4°C8 mph12 km/h WestMostly Clear
1am38°F4°C7 mph12 km/h WestClear
2am37°F3°C7 mph12 km/h WestClear
3am37°F3°C7 mph12 km/h WestClear
4am36°F2°C7 mph11 km/h WestMostly Clear
5am35°F2°C7 mph11 km/h WestPartly Cloudy
6am35°F2°C6 mph10 km/h WestMostly Cloudy
7am35°F2°C6 mph10 km/h SouthwestMostly Cloudy
8am37°F3°C7 mph11 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
November 2632°F0°C46°F8°C2 mph3 km/h from NorthwestRainMostly Clear
November 2734°F1°C47°F8°C8 mph12 km/h from WestPartly CloudyMostly Cloudy
November 2834°F1°C48°F9°C9 mph14 km/h from EastRainRain
November 2935°F2°C46°F8°C6 mph10 km/h from WestMostly ClearMostly Clear
November 3030°F-1°C41°F5°C9 mph15 km/h from WestClearMostly Clear
December 126°F-3°C37°F3°C7 mph11 km/h from WestPartly CloudyMostly Clear
December 224°F-4°C35°F2°C8 mph13 km/h from WestMostly ClearMostly Clear

Yes

Low of 35°F2°C, High of 47°F9°C
Wind: 8 mph12 km/h
Precipitation: None

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