A status yellow fog warning is in place across the country until 11am this morning.
Met Éireann is warning of dense patches in certain areas.
The fog will clear slowly during the morning leading to a dry and cloudy day with light rain in places.
Cloudy and misty overnight, with patches of fog becoming more widespread, the fog dense in places. Mainly dry, but a little patchy light rain or drizzle will occur. Minimum temperatures 3 to 6 Celsius, in light variable breezes. pic.twitter.com/ew7v4QAhBw
— Met Éireann (@MetEireann) January 22, 2020
Motorists are advised to drive with extra care, using fog lights when necessary.
The Road Safety Authority advises road users to slow down and watch out for vulnerable road users.
Fog lights should be used in areas of dense fog and should be turned off once the fog has cleared.