Yes

you do need a jacket based on the weather in Cambridge, MA 02140, USA 3 seconds ago

Why? Because it's pretty chilly!
57°F14°C & Mostly Clear

Wind is 9 mph14 km/h from the West, gusting to 17 mph28 km/h
June 2
9am59°F15°C9 mph15 km/h WestClear
10am61°F16°C10 mph16 km/h WestMostly Clear
11am63°F17°C10 mph16 km/h WestPartly Cloudy
12pm64°F18°C10 mph16 km/h WestPartly Cloudy
1pm66°F19°C9 mph15 km/h WestPartly Cloudy
2pm67°F19°C9 mph15 km/h WestMostly Cloudy
3pm68°F20°C10 mph15 km/h WestPartly Cloudy
4pm68°F20°C9 mph14 km/h WestPartly Cloudy
5pm69°F20°C8 mph13 km/h WestPartly Cloudy
6pm68°F20°C8 mph12 km/h WestPartly Cloudy
7pm66°F19°C6 mph10 km/h WestPartly Cloudy
8pm63°F17°C5 mph8 km/h SouthwestMostly Cloudy
DateLowHighWindDayNight
June 249°F10°C69°F20°C9 mph14 km/h from WestPartly CloudyMostly Clear
June 351°F11°C76°F24°C3 mph5 km/h from EastClearClear
June 456°F13°C84°F29°C6 mph9 km/h from SouthwestMostly ClearMostly Clear
June 563°F17°C87°F31°C5 mph8 km/h from SouthwestPartly CloudyMostly Cloudy
June 667°F20°C80°F27°C5 mph8 km/h from SouthwestMostly CloudyRain
June 764°F18°C74°F23°C7 mph10 km/h from SouthDrizzleDrizzle
June 862°F16°C74°F23°C6 mph9 km/h from NortheastPartly CloudyPartly Cloudy

Yes

Low of 51°F11°C, High of 76°F25°C
Wind: 3 mph5 km/h
Precipitation: None

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