MOTORISTS have been warned to take extra care as plummeting temperatures, severe frost and sleet leave roads in a treacherous state.
The mercury levels are expected to dip as low as -4C over the coming nights as the winter weather gets an icy grip.
Road safety bosses moved to warn drivers to take extra care with freezing fog, sleet and frosty nights expected to make driving conditions particularly difficult.
Met Eireann forecaster Joan Blackburn warned of heavy frost overnight and in the early mornings as commuters make their daily journeys to work.
"With still nights there will be -4C tonight in places. It could be lower. It depends on how calm the night is," the forecaster explained.
"They are not extremes of temperatures, it is cold for this time of year but not extreme," the forecaster explained.
Temperatures are expected to drop to 3C to 4C tomorrow, while they might drop further to -4C overnight. Sleet is expected to descend tomorrow, with snow in the mountains.
Other safety measures highlighted include using dipped headlights to ensure all road users see your vehicle.
So far this year 152 people have lost their lives on the roads, including 23 pedestrians. The RSA urged people out walking to wear appropriate footwear and ensure they are visible by wearing a hi-vis vest and carrying a torch, while cyclists were urged to ensure their bikes were fitted with lights.
Even if the chilly weather is causing havoc with the roads it is the perfect festive climate for some festive activities.
Dermot Page, chairman of the Irish Christmas Tree Growers' group, said the cold temperatures were perfect for keeping the 400,000 trees harvested for the home market, and a further 300,000 firs cut for export, in peak condition.
"It is perfect weather for ourselves, the wet summer didn't cause any problems with the growing," he said.