Yes

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

Why? Because the air feels like the cozy middle ground between summer and winter!
58°F14°C & Mostly Cloudy

Wind is 11 mph17 km/h from the West, gusting to 19 mph30 km/h
September 16
5am59°F15°C12 mph20 km/h WestMostly Cloudy
6am60°F16°C13 mph20 km/h WestCloudy
7am62°F16°C12 mph19 km/h WestCloudy
8am62°F17°C12 mph19 km/h WestCloudy
9am62°F17°C12 mph20 km/h WestCloudy
10am61°F16°C12 mph19 km/h WestCloudy
11am61°F16°C11 mph18 km/h SouthwestCloudy
12pm61°F16°C10 mph17 km/h SouthwestCloudy
1pm60°F16°C9 mph15 km/h SouthwestCloudy
2pm60°F15°C8 mph12 km/h SouthwestCloudy
3pm59°F15°C7 mph11 km/h SouthwestCloudy
4pm58°F14°C7 mph11 km/h SouthwestCloudy
DateLowHighWindDayNight
September 1553°F12°C62°F17°C11 mph18 km/h from WestCloudyDrizzle
September 1658°F14°C65°F18°C17 mph27 km/h from SouthwestDrizzleCloudy
September 1761°F16°C66°F19°C13 mph21 km/h from SouthwestCloudyCloudy
September 1859°F15°C66°F19°C8 mph13 km/h from SouthwestDrizzleCloudy
September 1958°F15°C65°F18°C9 mph15 km/h from SouthDrizzleRain
September 2052°F11°C61°F16°C14 mph22 km/h from EastRainRain
September 2150°F10°C61°F16°C18 mph29 km/h from EastDrizzleDrizzle

Yes

Low of 57°F14°C, High of 65°F19°C
Wind: 17 mph27 km/h
Precipitation: 42% rain

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