Yes

you do need a jacket based on the weather in Somerville, MA 02144, USA 1 second ago

Why? Because there's a refreshing nip in the air.
40°F5°C & Rain

Wind is 12 mph20 km/h from the NW, gusting to 27 mph44 km/h
March 29
6am39°F4°C13 mph20 km/h NWDrizzle
7am39°F4°C12 mph19 km/h NWRain
8am38°F3°C11 mph18 km/h NWRain
9am38°F3°C11 mph18 km/h NWRain
10am39°F4°C12 mph19 km/h NWDrizzle
11am40°F5°C13 mph21 km/h NWDrizzle
12pm42°F6°C13 mph22 km/h NWCloudy
1pm45°F7°C15 mph24 km/h NWCloudy
2pm47°F8°C16 mph25 km/h NWWindy
3pm48°F9°C16 mph26 km/h NWWindy
4pm48°F9°C17 mph27 km/h NWWindy
5pm49°F10°C16 mph25 km/h NWWindy
DateLowHighWindDayNight
March 2938°F3°C49°F10°C14 mph22 km/h from NWRainPartly Cloudy
March 3035°F2°C55°F13°C13 mph21 km/h from WMostly ClearMostly Cloudy
March 3137°F3°C53°F12°C8 mph14 km/h from NWMostly CloudyPartly Cloudy
April 133°F1°C54°F12°C4 mph6 km/h from SEMostly CloudyMostly Cloudy
April 237°F3°C45°F7°C7 mph12 km/h from ERainRain
April 334°F1°C41°F5°C16 mph26 km/h from NERainRain
April 436°F2°C44°F6°C16 mph26 km/h from NWDrizzleMostly Cloudy

Yes

Low of 35°F2°C, High of 55°F13°C
Wind: 13 mph21 km/h
Precipitation: None

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