Yes

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

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet and the wind is harsh and biting!
49°F9°C & Cloudy

Wind is 8 mph13 km/h from the Southeast, gusting to 19 mph31 km/h
November 1
3am49°F9°C9 mph14 km/h SoutheastRain
4am48°F9°C10 mph16 km/h SoutheastRain
5am48°F9°C11 mph17 km/h SouthDrizzle
6am47°F8°C10 mph16 km/h SouthCloudy
7am47°F8°C11 mph18 km/h SouthwestMostly Cloudy
8am47°F8°C15 mph24 km/h SouthwestDrizzle
9am47°F8°C18 mph29 km/h SouthwestWindy
10am48°F9°C18 mph29 km/h SouthwestDrizzle
11am48°F9°C18 mph30 km/h SouthwestWindy
12pm49°F10°C19 mph30 km/h SouthwestWindy
1pm50°F10°C19 mph31 km/h SouthwestWindy
2pm49°F9°C18 mph30 km/h SouthwestWindy
DateLowHighWindDayNight
November 142°F6°C50°F10°C16 mph26 km/h from SouthwestDrizzlePartly Cloudy
November 241°F5°C49°F9°C15 mph24 km/h from SouthwestDrizzleRain
November 348°F9°C58°F14°C20 mph32 km/h from SouthwestDrizzleRain
November 449°F10°C57°F14°C14 mph22 km/h from SouthwestDrizzleMostly Cloudy
November 546°F8°C54°F12°C6 mph9 km/h from NortheastRainRain
November 647°F8°C55°F13°C6 mph9 km/h from SouthwestRainMostly Cloudy
November 745°F7°C51°F11°C6 mph10 km/h from SouthMostly CloudyDrizzle

Yes

Low of 41°F5°C, High of 49°F10°C
Wind: 15 mph24 km/h
Precipitation: 31% rain

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