Yes

you do need a jacket based on the weather in Plymouth, UK 1 second ago

Why? Because it's pretty chilly.
55°F13°C & Cloudy

Wind is 10 mph16 km/h from the SW, gusting to 19 mph31 km/h
May 3
7am56°F13°C10 mph17 km/h SWCloudy
8am57°F14°C11 mph18 km/h SWCloudy
9am58°F14°C11 mph18 km/h SWCloudy
10am58°F14°C11 mph18 km/h SWCloudy
11am58°F15°C11 mph17 km/h SWMostly Cloudy
12pm58°F14°C10 mph16 km/h SWMostly Cloudy
1pm57°F14°C9 mph14 km/h SWMostly Cloudy
2pm55°F13°C8 mph13 km/h SWMostly Cloudy
3pm53°F12°C6 mph10 km/h SWPartly Cloudy
4pm51°F11°C5 mph8 km/h SWPartly Cloudy
5pm50°F10°C4 mph6 km/h SWPartly Cloudy
6pm49°F9°C3 mph5 km/h SWMostly Clear
DateLowHighWindDayNight
May 246°F8°C58°F15°C9 mph14 km/h from SWCloudyPartly Cloudy
May 342°F6°C60°F16°C8 mph13 km/h from SEMostly ClearPartly Cloudy
May 445°F7°C59°F15°C8 mph12 km/h from SEDrizzleRain
May 547°F8°C62°F17°C9 mph15 km/h from NWDrizzleMostly Clear
May 649°F9°C66°F19°C7 mph11 km/h from NWPartly CloudyMostly Cloudy
May 748°F9°C64°F18°C5 mph7 km/h from SMostly CloudyPartly Cloudy
May 849°F10°C66°F19°C8 mph13 km/h from EMostly CloudyMostly Cloudy

Yes

Low of 42°F6°C, High of 61°F16°C
Wind: 8 mph13 km/h
Precipitation: 9% rain

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