Yes

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

Why? Because it's pretty chilly and there are strong winds blowing out there!
55°F13°C & Windy

Wind is 15 mph24 km/h from the South, gusting to 31 mph50 km/h
October 31
1pm55°F13°C16 mph25 km/h SouthRain
2pm55°F13°C15 mph25 km/h SouthRain
3pm54°F12°C15 mph25 km/h SouthDrizzle
4pm54°F12°C14 mph23 km/h SouthDrizzle
5pm53°F12°C13 mph21 km/h SouthCloudy
6pm53°F12°C12 mph19 km/h SouthwestMostly Cloudy
7pm52°F11°C11 mph17 km/h SouthwestPartly Cloudy
8pm51°F10°C9 mph15 km/h SouthwestPartly Cloudy
9pm50°F10°C9 mph14 km/h SouthPartly Cloudy
10pm49°F9°C8 mph13 km/h SouthCloudy
11pm49°F9°C7 mph12 km/h SouthMostly Cloudy
November 1
12am49°F9°C8 mph12 km/h SouthDrizzle
DateLowHighWindDayNight
October 3149°F9°C55°F13°C14 mph22 km/h from SouthRainRain
November 143°F6°C49°F10°C14 mph23 km/h from SouthwestRainPartly Cloudy
November 241°F5°C49°F9°C14 mph23 km/h from SouthwestDrizzleRain
November 348°F9°C56°F13°C17 mph27 km/h from SouthwestRainRain
November 450°F10°C56°F13°C11 mph18 km/h from SouthwestMostly CloudyMostly Cloudy
November 546°F8°C54°F12°C5 mph8 km/h from EastDrizzleDrizzle
November 648°F9°C56°F13°C10 mph17 km/h from SouthwestDrizzlePartly Cloudy

Yes

Low of 43°F6°C, High of 49°F10°C
Wind: 14 mph23 km/h
Precipitation: 88% rain

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