Yes

you do need a jacket based on the weather in Cambridge, MA, USA 2 minutes ago

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet and it's really really huffing out there!
46°F8°C & Windy

Wind is 16 mph26 km/h from the Southwest, gusting to 38 mph61 km/h
November 1
1am45°F7°C16 mph27 km/h SouthwestWindy
2am44°F7°C19 mph30 km/h WestWindy
3am43°F6°C18 mph30 km/h WestWindy
4am43°F6°C18 mph29 km/h WestWindy
5am42°F6°C17 mph28 km/h WestWindy
6am42°F6°C17 mph27 km/h WestWindy
7am44°F7°C17 mph28 km/h WestWindy
8am44°F7°C17 mph27 km/h WestWindy
9am44°F7°C16 mph25 km/h WestWindy
10am44°F7°C15 mph24 km/h WestPartly Cloudy
11am44°F7°C14 mph23 km/h WestMostly Clear
12pm45°F7°C14 mph22 km/h WestMostly Clear
DateLowHighWindDayNight
October 3143°F6°C58°F15°C8 mph12 km/h from SouthwestMostly CloudyWindy
November 141°F5°C53°F12°C13 mph21 km/h from WestMostly ClearMostly Clear
November 236°F2°C52°F11°C7 mph11 km/h from WestMostly ClearMostly Clear
November 337°F3°C58°F14°C8 mph12 km/h from SouthwestMostly CloudyDrizzle
November 441°F5°C54°F12°C13 mph21 km/h from WestClearClear
November 539°F4°C53°F12°C7 mph11 km/h from WestPartly CloudyRain
November 640°F5°C53°F12°C12 mph20 km/h from WestDrizzleMostly Clear

Yes

Low of 41°F5°C, High of 54°F12°C
Wind: 13 mph21 km/h
Precipitation: None

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