Forecasters say we could be in for an arctic blast of cold air, and potentially some snow as winter hits.
Temperatures are starting to fall and a weather pattern developing over Scandinavia could bring in much cooler air from the north from Monday, say forecasters.
Met Office forecasters say mist and fog will be slow to clear across the north west today (Thursday) although it will remain largely dry and cold, with temperatures struggling to top 7C.