A status yellow low temperature weather warning has been issued by Met Eireann, with values set to drop to as low as -4º overnight.
The warning will affect all of Ireland; air temperatures overnight will range from zero to -4º.
Issued at 12:00pm this afternoon, the warning will be valid from 8:00pm this evening (Monday, December 11) until 10:00am tomorrow morning.
This warning comes on the back of a weekend of sub-zero temperatures and substantial snowfall.
Up to 8cm of snow was forecast to fall in some parts of the country late last week and over the weekend.
The current cold snap is set to continue for the rest of the week, with severe frost a common theme over the next few nights.
It is set to be very cold today, but many areas will be dry with sunny spells. Scattered wintry showers of rain or sleet, mainly across the north and west, are expected.
After a bitterly cold start, frost and ice may linger in some inland areas. Temperatures are forecast to recover to range from 2º to 5º, in moderate to fresh north-west winds.
Isolated wintry showers in the north-west are expected to die out, with tonight set to be dry and clear with widespread severe frost returning.