Is there a weather map of the UK?

You aren’t in a specific area… it’s a list of locations. The list includes locations like villages, towns, cities, suburbs, and the forecast is made using a grid modified to account for local geographical features. Your location isn’t the grid itself, but the forecast uses the grid to make a forecast for a specific location. https://www.metoffice.gov.uk/weather/guides/local-weather But also, sometimes, depending on the part of the forecasting service you’re using, it will be for your nearest synoptic station, so the ‘area’ your observations might come from is a complex set of polygons centred on observations stations (often airports and botanical gardens). https://www.metoffice.gov.uk/research/climate/maps-and-data/uk-synoptic-and-climate-stations