Yes

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

Why? Because it's raining in your area and it's so windy, you’re practically horizontal just trying to walk!
61°F16°C & Rain

Wind is 17 mph28 km/h from the Southeast, gusting to 30 mph48 km/h
September 9
1pm60°F16°C18 mph29 km/h SoutheastDrizzle
2pm60°F16°C18 mph29 km/h SoutheastDrizzle
3pm59°F15°C18 mph28 km/h SoutheastRain
4pm59°F15°C17 mph28 km/h SoutheastRain
5pm58°F15°C17 mph27 km/h SoutheastRain
6pm58°F14°C15 mph24 km/h SoutheastRain
7pm58°F14°C14 mph23 km/h SoutheastDrizzle
8pm58°F14°C13 mph22 km/h SoutheastDrizzle
9pm57°F14°C12 mph20 km/h SoutheastDrizzle
10pm57°F14°C11 mph18 km/h SouthDrizzle
11pm57°F14°C10 mph15 km/h SouthDrizzle
September 10
12am56°F13°C8 mph13 km/h SouthRain
DateLowHighWindDayNight
September 856°F13°C61°F16°C13 mph21 km/h from SoutheastRainRain
September 956°F13°C63°F17°C13 mph21 km/h from SouthwestRainDrizzle
September 1053°F12°C58°F15°C18 mph28 km/h from WestRainDrizzle
September 1151°F11°C59°F15°C15 mph24 km/h from SouthwestRainRain
September 1251°F10°C61°F16°C14 mph23 km/h from WestDrizzleRain
September 1355°F13°C65°F18°C22 mph36 km/h from SouthwestRainDrizzle
September 1454°F12°C60°F16°C23 mph36 km/h from SouthwestDrizzleDrizzle

Yes

Low of 55°F13°C, High of 63°F17°C
Wind: 13 mph21 km/h
Precipitation: 85% rain

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