Yes

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

Why? Because it's cool. Pleasantly cool, but cool.
51°F10°C & Cloudy

Wind is 12 mph20 km/h from the SW, gusting to 17 mph28 km/h
April 24
3pm51°F11°C12 mph19 km/h SWPartly Cloudy
4pm52°F11°C10 mph16 km/h SWMostly Clear
5pm53°F12°C8 mph13 km/h SWMostly Clear
6pm53°F12°C11 mph17 km/h WPartly Cloudy
7pm52°F11°C14 mph23 km/h NWPartly Cloudy
8pm50°F10°C19 mph30 km/h NWWindy
9pm48°F9°C25 mph40 km/h NWWindy
10pm45°F7°C26 mph42 km/h NWWindy
11pm43°F6°C27 mph43 km/h NWWindy
April 25
12am41°F5°C25 mph41 km/h NWindy
1am41°F5°C23 mph37 km/h NWindy
2am40°F4°C22 mph35 km/h NWindy
DateLowHighWindDayNight
April 2441°F5°C53°F12°C14 mph22 km/h from SWMostly CloudyWindy
April 2537°F3°C43°F6°C8 mph13 km/h from NEClearClear
April 2639°F4°C48°F9°C6 mph9 km/h from NEClearClear
April 2741°F5°C52°F11°C10 mph16 km/h from SMostly ClearWindy
April 2843°F6°C56°F14°C14 mph23 km/h from SWMostly CloudyPartly Cloudy
April 2950°F10°C57°F14°C9 mph15 km/h from EPartly CloudyPartly Cloudy
April 3049°F9°C59°F15°C17 mph27 km/h from SWindyMostly Cloudy

Yes

Low of 37°F3°C, High of 43°F6°C
Wind: 8 mph13 km/h
Precipitation: None

Support This Page