Yes

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

Why? Because it's cool enough your breath is visible, but your nose isn’t red yet!
36°F2°C & Clear

Wind is 6 mph10 km/h from the Northwest, gusting to 12 mph20 km/h
January 30
3am36°F2°C6 mph9 km/h NorthwestClear
4am37°F3°C5 mph8 km/h NorthwestClear
5am40°F4°C5 mph7 km/h WestClear
6am42°F6°C7 mph12 km/h WestMostly Clear
7am44°F7°C8 mph14 km/h WestMostly Clear
8am45°F7°C9 mph14 km/h WestMostly Clear
9am46°F8°C9 mph15 km/h WestMostly Clear
10am45°F7°C9 mph14 km/h WestMostly Clear
11am45°F7°C9 mph14 km/h WestMostly Clear
12pm43°F6°C7 mph12 km/h WestMostly Clear
1pm41°F5°C6 mph10 km/h WestMostly Clear
2pm40°F4°C4 mph7 km/h WestClear
DateLowHighWindDayNight
January 2936°F2°C46°F8°C7 mph11 km/h from WestMostly ClearRain
January 3037°F3°C49°F9°C6 mph10 km/h from NorthwestMostly ClearPartly Cloudy
January 3135°F2°C44°F7°C6 mph10 km/h from SoutheastMostly CloudyDrizzle
February 139°F4°C47°F8°C6 mph10 km/h from SoutheastMostly CloudyMostly Cloudy
February 239°F4°C49°F9°C7 mph11 km/h from SouthMostly CloudyDrizzle
February 340°F4°C48°F9°C11 mph18 km/h from SouthDrizzlePartly Cloudy
February 436°F2°C45°F7°C6 mph9 km/h from NorthPartly CloudyPartly Cloudy

Yes

Low of 37°F3°C, High of 49°F10°C
Wind: 6 mph10 km/h
Precipitation: None

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