According to this week's weather outlook, there's a likelihood of snow on Thursday evening, with temperatures expected to fall to -2 degrees, with Friday morning expected to bring further snow and possibly some sleet. There is a 40 percent chance of snow.
Tuesday's forecast calls for sunny skies with a high of 43 and an overnight low of 22. "The game-changer, so to speak, is a cold front Tuesday night".
As well as feeling cold, there is an increasing threat of sleet and snow showers feeding down across the country.
Tonight's conditions will remain relatively dry with temperatures dropping to as low as one degree. Southeast wind 7 to 9 miles per hour.
"It starts on a fairly quiet note with high pressure to the southwest of us, bringing mainly fine if rather cloudy weather". A northwest wind of 17 to 22 miles per hour will decrease to 11 to 16 miles per hour after midnight.
Tuesday Nnight: Showers likely. Chance of precipitation is 70%.
Wednesday: Showers likely before noon.
Wednesday will be mostly cloudy and cooler with a high of 44 and a low around 26.
Those spells of rain will continue throughout Wednesday as it spreads eastwards across the country, with temperatures reaching as high as 13 degrees with fresh to strong southerly winds. The overnight low is expected to be near 19.
"By Friday the United Kingdom will be in an Arctic Maritime air mass with temperatures across the country staying in low single figures by day and below freezing by night".
The low is expected to be 28, so it may be in the low 30s at the time of the tree lighting.