IT MIGHT have looked like spring for the past few days, but it's going to feel like winter again from today when the mercury dips.
The mild and sunny spell is about to end as temperatures fall below zero at night-time for the rest of the week, Met Eireann is warning. But at least the rain is due to stay away for the time being.
Met Eireann forecaster Eoin Sherlock said that temperatures would be sub zero in many places at nightime, as low as -3 on Thursday, and as low as -5 on higher ground.
"It will be much lower than normal. This will be a cool, dry spell," he added.
Mr Sherlock said the cold air would be coming in from an easterly direction. The sub-zero temperatures will affect most of the country, although it will not be as cold in the southwest. Overnight temperatures were expected to drop to between -2C and 2C for much of the country, with the lowest temperatures in north Leinster and Ulster. Frost is also expected in these areas along with some patches of mist and fog.
It will turn even colder from tomorrow, particularly in eastern areas where the southeast winds will freshen.
While motorists will have to take care, the rain is due to hold off, which should reduce the incidence of dangerous ice on roads.
The cold spell, which is expected to continue through next weekend, is in contrast to the above-average temperatures recorded for January.