Yes

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

Why? Because it's quite chilly!
46°F8°C & Mostly Cloudy

Wind is 4 mph7 km/h from the West, gusting to 9 mph14 km/h
December 25
12am46°F8°C4 mph7 km/h WestMostly Cloudy
1am46°F8°C4 mph7 km/h SouthwestMostly Cloudy
2am45°F7°C5 mph7 km/h WestMostly Cloudy
3am45°F7°C5 mph7 km/h WestMostly Cloudy
4am46°F8°C4 mph7 km/h WestMostly Cloudy
5am47°F9°C4 mph7 km/h WestMostly Cloudy
6am49°F9°C5 mph8 km/h WestMostly Cloudy
7am50°F10°C6 mph9 km/h WestMostly Cloudy
8am51°F11°C6 mph9 km/h WestMostly Cloudy
9am51°F11°C5 mph8 km/h WestMostly Cloudy
10am51°F10°C4 mph6 km/h WestMostly Cloudy
11am49°F9°C3 mph5 km/h WestMostly Cloudy
DateLowHighWindDayNight
December 2444°F7°C51°F11°C4 mph7 km/h from WestMostly CloudyMostly Cloudy
December 2542°F5°C49°F9°C2 mph3 km/h from SouthMostly CloudyMostly Cloudy
December 2640°F5°C48°F9°C2 mph3 km/h from NortheastCloudyCloudy
December 2741°F5°C50°F10°C6 mph10 km/h from SouthwestMostly CloudyMostly Clear
December 2836°F2°C47°F9°C8 mph13 km/h from WestMostly ClearCloudy
December 2941°F5°C49°F9°C13 mph21 km/h from SouthwestDrizzleDrizzle
December 3042°F6°C50°F10°C15 mph24 km/h from SouthwestDrizzleCloudy

Yes

Low of 42°F6°C, High of 49°F10°C
Wind: 2 mph3 km/h
Precipitation: None

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