Frost will return tonight under clear skies, and will be most severe across the south of the country. Lowest values tonight -2 to -5 , but -1 to +3 degrees over Donegal and the more northern areas. Fog will become more widespread overnight in the almost calm conditions.
Dry again tomorrow with some sunshine. Areas of fog, dense in parts, will give poor driving conditions and fog could persist all day in some parts of the country.
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