While revellers enjoying the weekend and sports fans watching the rugby today will enjoy some sunny, albeit cold weather, it is set to be followed by icy winds and frigid temperatures up to six degrees lower than normal.
Meteorologists at The Weather Channel have predicted it will feel as cold as -7°C (-19°F) tomorrow as the Siberian "Beast from the East" takes hold.
It will be a case of keeping the woolly hats and scarves on standby, with Met Eireann warning that there could be heavy snowfall with temperatures expected to drop as low as -4C.
Power cuts and mobile phone services may also be affected.
"The air cools and moisture turns to snow, we are expecting this effect from Monday".
There is the potential for travel delays on roads, with some stranded vehicles and passengers, as well as delays or cancellations to rail and air travel.
Disruptive snow showers are expected from Tuesday onwards, particularly in the east and southeast.
A forecaster revealed: "High pressure over Scandinavia continuing to influence our weather with mostly dry conditions at first but then becoming exceptionally cold with wintry showers becoming widespread early next week".
For the rest of the week, temperatures will remain cold but will rise above freezing for the rest of the week.
Another cold, dry and largely sunny day is expected on Saturday. There will be a widespread sharp to severe frost and drivers are advised to slow down and be mindful of areas of black ice.
Very cold, with brisk winds and overnight frosts.
By the end of this long-lasting cold snap, much of Europe will be blanketed in a deep snow cover just as spring begins to set in. This could fall as snow or sleet.