Yes

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

Why? Because a jacket will keep you cozy, but you won't break a seat and the wind could blow a wig clean off your head!
52°F11°C & Windy

Wind is 15 mph24 km/h from the Southwest, gusting to 24 mph38 km/h
September 11
3am53°F12°C15 mph25 km/h SouthwestWindy
4am54°F12°C17 mph27 km/h SouthwestWindy
5am55°F13°C17 mph28 km/h SouthwestWindy
6am56°F14°C17 mph28 km/h SouthwestWindy
7am58°F14°C17 mph28 km/h SouthwestWindy
8am58°F15°C18 mph29 km/h WestWindy
9am59°F15°C18 mph29 km/h SouthwestWindy
10am58°F14°C17 mph28 km/h WestDrizzle
11am58°F15°C18 mph29 km/h SouthwestDrizzle
12pm58°F14°C17 mph28 km/h SouthwestWindy
1pm57°F14°C15 mph25 km/h WestWindy
2pm56°F13°C15 mph24 km/h WestMostly Cloudy
DateLowHighWindDayNight
September 1052°F11°C59°F15°C17 mph27 km/h from SouthwestDrizzlePartly Cloudy
September 1151°F10°C61°F16°C16 mph25 km/h from SouthwestDrizzleDrizzle
September 1250°F10°C59°F15°C18 mph29 km/h from SouthwestDrizzlePartly Cloudy
September 1351°F10°C61°F16°C21 mph33 km/h from SoutheastRainRain
September 1453°F12°C60°F16°C18 mph29 km/h from WestDrizzleDrizzle
September 1552°F11°C60°F16°C13 mph21 km/h from WestPartly CloudyRain
September 1653°F11°C61°F16°C14 mph23 km/h from SouthwestRainDrizzle

Yes

Low of 51°F11°C, High of 61°F16°C
Wind: 16 mph25 km/h
Precipitation: 42% rain

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