Well, the moment has come
The 19th December - when many kids break from school has appeared in the GFS charts.....
I'm going to do my best to update this at least once each day, but bear with me if life interferes a bit. My usual disclaimer: I'm only an amateur and I get things wrong. I dont say this out of false modesty but because its true and for important forecasts and for making decisions please refer to the met office.
Also at this range the forecast will be complete crap anyway and will change daily. As we get closer to the Christmas holidays other models will come into range and things will start to become more accurate - hopefully!
So:
Friday 19th (GFS) - The day starts off cold with temps around freezing. Some precipitation but it looks to err on the wrong side of frozen (ie not). Europe isnt looking cold for this time of year and so we are looking to our north and north west for the cold at this point.
That's as far as the model goes 
but later in the day I would expect it to end up in single fig temps. Might update this on the next model run.