Yes

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

Why? Because a jacket will keep you cozy, but you won't break a seat!
56°F13°C & Clear

Wind is 5 mph8 km/h from the Northwest, gusting to 11 mph17 km/h
September 11
1am55°F13°C5 mph8 km/h NorthwestClear
2am54°F12°C5 mph7 km/h NorthwestClear
3am53°F12°C5 mph8 km/h NorthwestClear
4am52°F11°C4 mph6 km/h NorthwestClear
5am52°F11°C4 mph6 km/h NorthwestClear
6am51°F11°C4 mph6 km/h WestClear
7am53°F12°C4 mph7 km/h NorthwestClear
8am57°F14°C4 mph7 km/h NorthwestMostly Clear
9am62°F17°C5 mph8 km/h NorthwestClear
10am67°F20°C6 mph9 km/h NorthClear
11am71°F22°C6 mph10 km/h NorthClear
12pm74°F23°C7 mph11 km/h NorthClear
DateLowHighWindDayNight
September 1151°F11°C77°F25°C5 mph8 km/h from NorthMostly ClearPartly Cloudy
September 1255°F13°C70°F21°C6 mph10 km/h from EastMostly ClearClear
September 1352°F11°C73°F23°C5 mph7 km/h from SoutheastPartly CloudyMostly Clear
September 1458°F14°C74°F24°C6 mph9 km/h from SouthwestThunderstormsDrizzle
September 1558°F14°C69°F21°C8 mph13 km/h from EastDrizzlePartly Cloudy
September 1657°F14°C74°F23°C6 mph10 km/h from NortheastMostly ClearPartly Cloudy
September 1758°F15°C73°F23°C7 mph11 km/h from NortheastPartly CloudyPartly Cloudy

Yes

Low of 55°F13°C, High of 70°F21°C
Wind: 6 mph10 km/h
Precipitation: None

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