Source: Met Éireann
Met Éireann has issued a Status Yellow weather warning for the whole country due to the risk of ice and snow.
The forecast says icy and slippery conditions are expected due to the accumulation of ice and snow on untreated surfaces.
Scattered sleet and snow showers most frequent across Ulster and Connacht will occur but some showers penetrating into central and eastern areas at times with the odd flurry further south.
Accumulations generally 1-2cm expected.
Wintry showers becoming confined to northern areas by late evening.
The warning is valid from Monday January 21 at 9pm to Tuesday, January 22 at 7pm.