Freezing fog, severe frost and icy stretches on roads and footpaths will create hazardous conditions for drivers and pedestrians into Monday after the extension of a set of weather warnings.
The status yellow low temperature and ice warning for Ireland, which was due to end on Sunday, will remain in place until 11am on Monday, with very cold day and night temperatures expected. Frost and ice will persist in places.
The Arctic airflow is set to continue into the early days of next week, with persistently very cold temperatures causing difficulties for those travelling, particularly through higher ground.
Dense fog will form in places with patches of freezing fog, Met Éireann has said, and some showers of hail and sleet are expected too, falling as snow in places.
Met Éireann has issued a status yellow low temperature/ice warning for Ireland with possible impacts including slippery conditions underfoot, hazardous travelling conditions and animal welfare issues.
A status yellow fog warning is also in place for the country, with dense fog in many areas.
In the UK, temperatures as low as minus-12 were expected in places, with trains and some events, including football fixtures, cancelled on Saturday.
Frequent snow showers in the northwest were expected to cause disruption to transport there, with amber health warnings issued for vulnerable people due to the low temperatures.
Snowfall led to international travel disruption on Saturday, with Dublin Airport flights to and from Munich and Amsterdam cancelled and flights suspended at Glasgow Airport for a period.
Lowest temperatures of minus-3 were expected on Saturday night, a little less cold in southwest coastal parts, in mostly light variable breezes or calm conditions.
Sunday was expected to be another cold day, with frost, ice and fog for many, slow again to clear through the morning and lingering in some sheltered areas through the day.
It will be generally dry in most areas with sunny spells and isolated wintry showers, those mainly along northern and eastern coasts. However, patchy rain will linger for a time in southeastern counties. Highest temperatures of 1 to 5 degrees generally in mostly light northeasterly breezes, increasing moderate in the south and southwest later.
Any lingering rain in the southeast will clear on Sunday evening to leave a very cold night but predominantly dry with just isolated wintry showers, most likely along eastern and northern fringes.
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