Met Éireann forecasts fog but mild weather.
'Dense fog' could make for difficult driving conditions in Laois and Leinster on Monday evening and on Tuesday morning but the run up to Christmas should be largely mild and settled, according to the latest weather forecast from Met Éireann.
The forecaster says extensive mist and fog returning tonight, locally dense in eastern and southern parts of the country. Many places will be dry, but occasional drizzle patches will occur, especially on hills and near coasts.
It will be cool at first, with some grass frost possible in eastern and northeastern areas, but temperatures will rise steadily overnight with values of 9 to 12 Celsius by dawn. Light to moderate southerly winds will freshen along Atlantic coasts.
Tuesday will be mostly cloudy, mild and breezy, with mist and fog in places to begin. Many parts will be dry, but again a few drizzle patches will occur, especially along Atlantic coasts. Highs of 10 to 13 degrees in moderate to fresh southerly winds.
It is expected to be mild and misty Tuesday night, with light and patchy rain and fog. But drier, cooler, clearer weather will develop over Ulster and north Connacht by dawn, dropping temperatures there to lows of 5 to 7 degrees. Temperatures elsewhere, not falling below around 10 degrees. Winds will be mainly light to moderate south to southwest in direction.
There will be bright or short sunny spells over Ulster and north Connacht on Wednesday, with highest temperatures there of 7 to 9 degrees. But misty and mostly cloudy elsewhere, with occasional drizzle and fog. Temperatures of 10 to 12 degrees. Winds will be light variable in direction.
Some frost is expected for a time on Wednesday night in northern areas, but this will clear as the mild and mostly cloudy conditions elsewhere extend to northern parts also.
There is a chance of a spell of rain on Thursday across the southern half of the country, but amounts still look likely to be small and it will become mainly dry again later. Winds remain light variable in direction as anticyclonic conditions persist. Cold and frosty Thursday night in the north of the country, but remaining mild in the south. Risk of fog, mostly in the north.
Frost and fog clearing on Friday morning, and it will be be mild and mostly cloudy.
Saturday looks breezy with a lot of dry weather.