Yes

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

Why? Because a little drizzle out and it's not very warm out and it's so windy, your hat will probably launch into orbit!
53°F11°C & Drizzle

Wind is 16 mph25 km/h from the Southeast, gusting to 26 mph42 km/h
November 9
10am53°F12°C16 mph25 km/h SoutheastDrizzle
11am53°F12°C15 mph25 km/h SouthDrizzle
12pm54°F12°C15 mph24 km/h SouthCloudy
1pm54°F12°C14 mph23 km/h SouthPartly Cloudy
2pm54°F12°C14 mph23 km/h SouthMostly Clear
3pm54°F12°C14 mph23 km/h SouthMostly Clear
4pm53°F11°C14 mph23 km/h SouthMostly Clear
5pm52°F11°C15 mph24 km/h SouthMostly Clear
6pm51°F11°C16 mph25 km/h SouthWindy
7pm51°F10°C16 mph25 km/h SouthWindy
8pm50°F10°C15 mph25 km/h SouthWindy
9pm50°F10°C15 mph24 km/h SouthMostly Clear
DateLowHighWindDayNight
November 949°F9°C54°F12°C15 mph24 km/h from SouthDrizzlePartly Cloudy
November 1045°F7°C50°F10°C6 mph9 km/h from NortheastDrizzleDrizzle
November 1143°F6°C50°F10°C7 mph11 km/h from EastDrizzleRain
November 1244°F7°C49°F9°C23 mph37 km/h from NortheastRainDrizzle
November 1343°F6°C46°F8°C20 mph33 km/h from NortheastDrizzleMostly Cloudy
November 1441°F5°C45°F7°C15 mph24 km/h from EastMostly CloudyWindy
November 1540°F4°C45°F7°C14 mph22 km/h from NortheastPartly CloudyMostly Cloudy

Yes

Low of 46°F8°C, High of 51°F11°C
Wind: 6 mph9 km/h
Precipitation: 58% rain

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