Temperatures are set to drop this evening as an arctic airmass moves across the country, according to Met Éireann.
Frost and ice will become widespread for a couple of nights with temperatures reaching as low as -3C in areas later in the week.
Wind chill factor could make conditions feel even colder, the forecaster said.
Some snow showers are forecast, particularly in northern areas and at altitude, with other showers falling as sleet and hail.
Modest snow accumulations are also forecast tomorrow on higher ground in the north and northwest.
Temperatures are set to increase across the country on Friday and into the weekend.
However, the weather will then become more unsettled, with heavy rain and hail showers in places across the weekend.
Watch: Weather to get colder as wintry conditions forecast
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