UK Outlook for Saturday 5 Jan 2019 to Saturday 19 Jan 2019:
Generally quite settled and dry across the south with variable amounts of cloud and overnight mist and fog patches. Perhaps more changeable in the north with rain and stronger winds at times. Probably turning more widely unsettled for a time in early January with showers or longer spells of rain and stronger winds affecting all parts along with some hill snow in the north. Then, further into January, most probably becoming colder and drier than normal, with an increased likelihood of easterly winds. There is uncertainty at this stage, but this could see an increased chance of snow across many areas. Despite the potential change to colder weather through mid-January, some milder, wet and windy interludes remain possible throughout the period
https://www.metoffice.gov.uk/public/weather/forecast
https://twitter.com/fergieweather/status/1076128636330274816
By Christmas Day & into early Jan, high pressure is set to dominate UK weather (ECMWF shown for 30/12, high cell position not to be taken literally!). However, this is likely to shift to Scandinavia further into Jan, with increasing risk of cold by mid-Jan on into Feb.