Click the link that I have below & a map will appear showing Europe with the temperatures as of now. Then, click and drag the map westward to north America. Much of north America has more severe weather than most of Europe with excessive heatwaves in summer and freezing winters. That said, Atlantic storms can batter NW Europe and the British Isles were hit with one such storm in early December.
If you go to the menu on the website given below and change it to show sea temperatures, you will see that warm ocean currents (Gulf Stream/N Atlantic Drift) cross the ocean to NW Europe and that the sea water is warmer say in Ireland than at the same latitude on the east or west coast of Canada. The prevailing winds in Britain are westerlies and are thus warmed by the ocean. However, if easterlies reach western Europe in winter, it can be cold but Britain even has these winds warmed a bit by crossing the sea.
https://www.windy.com/-Temperature-temp?temp,48.763,-5.757,5