Yes

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

Why? Because it's pretty chilly!
50°F10°C & Cloudy

Wind is 5 mph8 km/h from the West, gusting to 11 mph17 km/h
December 25
11am50°F10°C5 mph8 km/h WestCloudy
12pm50°F10°C5 mph8 km/h WestCloudy
1pm50°F10°C4 mph7 km/h WestCloudy
2pm49°F10°C3 mph5 km/h WestCloudy
3pm49°F10°C3 mph4 km/h WestCloudy
4pm49°F9°C2 mph4 km/h WestCloudy
5pm48°F9°C2 mph4 km/h SouthwestMostly Cloudy
6pm48°F9°C2 mph3 km/h SouthwestMostly Cloudy
7pm48°F9°C2 mph3 km/h SouthwestMostly Cloudy
8pm47°F9°C2 mph3 km/h SouthwestCloudy
9pm47°F8°C2 mph4 km/h SouthwestMostly Cloudy
10pm47°F8°C3 mph4 km/h SouthwestCloudy
DateLowHighWindDayNight
December 2448°F9°C51°F11°C6 mph10 km/h from WestCloudyCloudy
December 2545°F7°C51°F10°C2 mph3 km/h from SoutheastMostly CloudyCloudy
December 2643°F6°C48°F9°C3 mph5 km/h from SoutheastMostly CloudyMostly Cloudy
December 2740°F4°C50°F10°C7 mph11 km/h from SouthwestDrizzleMostly Clear
December 2837°F3°C48°F9°C10 mph16 km/h from WestMostly CloudyDrizzle
December 2945°F7°C50°F10°C14 mph23 km/h from WestRainRain
December 3042°F5°C47°F8°C19 mph31 km/h from SouthwestDrizzleDrizzle

Yes

Low of 46°F8°C, High of 51°F11°C
Wind: 2 mph3 km/h
Precipitation: None

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