Yes

you do need a jacket based on the weather in Arbroath DD11, UK 1 second ago

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet and it's really really huffing out there!
50°F10°C & Windy

Wind is 27 mph43 km/h from the Southeast, gusting to 44 mph71 km/h
October 30
10pm50°F10°C28 mph45 km/h SoutheastWindy
11pm50°F10°C29 mph47 km/h SoutheastDrizzle
October 31
12am50°F10°C29 mph47 km/h SoutheastRain
1am50°F10°C28 mph45 km/h SoutheastRain
2am49°F10°C25 mph40 km/h SouthDrizzle
3am49°F10°C22 mph36 km/h SouthWindy
4am50°F10°C19 mph30 km/h SouthWindy
5am50°F10°C16 mph26 km/h SouthWindy
6am50°F10°C15 mph24 km/h SouthWindy
7am50°F10°C15 mph25 km/h SouthWindy
8am51°F11°C16 mph25 km/h SouthWindy
9am52°F11°C17 mph28 km/h SouthWindy
DateLowHighWindDayNight
October 3038°F3°C51°F10°C11 mph18 km/h from SoutheastDrizzleRain
October 3149°F10°C55°F13°C19 mph30 km/h from SouthRainRain
November 144°F6°C52°F11°C18 mph29 km/h from SouthwestDrizzlePartly Cloudy
November 242°F6°C51°F10°C18 mph29 km/h from SouthwestWindyDrizzle
November 348°F9°C57°F14°C19 mph31 km/h from SouthwestRainRain
November 447°F8°C54°F12°C15 mph25 km/h from SouthwestRainPartly Cloudy
November 542°F6°C50°F10°C8 mph13 km/h from SouthDrizzleDrizzle

Yes

Low of 49°F10°C, High of 55°F13°C
Wind: 19 mph30 km/h
Precipitation: 70% rain

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