Temperatures are expected to drop to near freezing tonight, with winter conditions beginning to hit Ireland.
Met Eireann predicted it would be "cold" with a slight frost on the ground – especially inside.
The national forecast said: "Tonight will be dry with long clear periods of time. It will be cold with temperatures ranging from 0 to +3 degrees with light frost on the ground – especially inland. Fog and shallow fog may form in some places. "
Prior to that, conditions will be "thin, bright and dry in most areas today," with some clouds and good sunshine. There will be showers in the north and northwest, with temperatures ranging between 10 and 12 degrees.
MONDAY AND DRY
Monday is set to start the cold, but the day will be dry.
Met Eireann said: "Good sunshine will come again – better in the central south and east.
"It will be cloudy in the west and north in the afternoon and evening as the southwest breeze develops; winds remain light elsewhere. Higher temperatures of 9 to 12 degrees.
"Monday night will remain virtually dry overnight, with a fair amount of cloud in the western and northern counties, but some clear periods elsewhere.
"Minimum temperatures of 2 to 5 degrees under the clearest sky, but varying from 6 to 9 degrees under clouds. The southwest breeze will increase cool along the northwest coast."
The weather will be dry again on Tuesday, but usually cloudy with some patches of light rain or drizzle in the Atlantic coastal districts.
The forecast read: "Best of all sunny ranges in the east and southeast of the country. Higher temperatures from 10 to 13 degrees in a moderate to cool southwest breeze.
"Rain outbreaks will spread throughout Connacht and Ulster at night, but will remain dry mainly elsewhere. Minimum temperatures of 7 to 9 degrees in moderate to cool southern winds.
"Rain outbreaks spread across the country on Wednesday with the strange heavy blast. Higher temperatures of 12 to 15 degrees in moderate southern winds.
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"A few patches of rain at night, but mostly dry with fog. Minimum temperatures of 4 to 7 degrees in the northwest breeze.
"Current indications suggest that it will be cold and almost always dry on Thursday with some sunny periods. Higher temperatures from 9 to 12 degrees in light breeze.
"There is still a lot of uncertainty in Friday's forecast, but the latest indications suggest that an area of rain will move from the south accompanied by cooler winds from the south."