The national forecaster predicts that ice and snow will stick as the day progresses.
It's been a chilly few days as temperatures have dropped below freezing temperatures recently.
This morning, a lot of ice and lying snow is visible in many areas around the country.
Snow is affecting parts of Monaghan, Galway, Westmeath, Roscommon, Longford and Leitrim this morning.
A Status Yellow snow/ice warning was due to be in place until midday.
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Still icy in a number of areas, with particular care advised around Clifden in Galway, on higher ground in Kerry, west Cork and Wicklow, and in north-eastern parts of Dublin.Warning remains in place now for the whole country until 7pm.
Updates at https://t.co/PSzIBsvOzE pic.twitter.com/mhdIz132st
— AA Roadwatch (@aaroadwatch) January 24, 2021
Due to temperatures staying near zero or below, the warning been extended for the entire country until 7pm.
The forecaster has also issued a Status Yellow low temperature warning, which will take effect from 7pm and run until 10 tomorrow morning.
Alan O'Reilly of Carlow Weather is warning of caution on roads and footpaths.
"Anything that falls is likely to freeze which will lead for treacherous driving and even conditions walking on footpaths."
AA Roadwatch Deputy Editor, Lauren Beehan, says snowfall is particularly bad around Monaghan Town and Clontibret.
She also said snowfall has caused difficult conditions in the Clifden area of Galway.
Scattered sleet, snow and rain showers will continue through the day with some accumulations leading to icy conditions. Sunny spells too but bitterly cold with highs of just 1 to 4 degrees, in northwest breezes. https://t.co/9gKN6SVok4 pic.twitter.com/1kyr5XHp67
— Met Éireann (@MetEireann) January 24, 2021