A "WIDESPREAD dusting" of snow is expected tonight and tomorrow in the east and north, and overnight temperatures as low as minus 4 Celsius will bring widespread frost, according to Met Eireann.
Motorists have been warned to drive extremely carefully over the next few days as frost and snow bring treacherous road conditions to many parts of the country.
Snow is likely to lie on the ground and will make driving conditions particularly hazardous in mid Ulster and north Leinster.
There will be bitterly cold north easterly winds for the rest of the week and daytime temperatures, will range from 1 C to 4 C. The worst of the weather will be in Dublin, along the east coast and in parts of Northern Ireland.
Meanwhile, the death toll climbed yesterday as severe weather continued to grip Europe and North America. At least 90 people have so far died from the record low temperatures, with fatalities recorded in virtually every country from Russia to Spain.
In France, three more people sleeping rough were found dead over the weekend, bringing the overall toll to 10 in a week as temperatures slumped to their lowest for 34 years. The bodies of two homeless were discovered in the streets of Madrid yesterday, taking the number of dead in Spain to five.
Temperatures plunged to a 10 year low of minus 37 C (minus 36 Fahrenheit) in Poland, where the number of fatalities has risen to 28. Most of the victims were homeless or too poor to pay their heating bills, though some had gone to sleep in the snow after drinking too much vodka.
The Romanian Prime Minister, Mr Victor Ciorbea, appealed to police to go to the aid of the homeless after at least 20 Romanians died from the cold.
In Canada, mainland southern British Columbia and Vancouver Island were bracing themselves yesterday for a gigantic thaw and inevitable floods after suffering their worst snowstorms on record.
In Moscow, 10 people are reported to have died during the past week, and some 250 were hospitalised suffering from the effects of cold as night time temperatures plunged to minus 30 C.