Met Eireann have predicted a dramatic change in temperature for this week.
They have pinpointed the day that the mercury will drop and have warned of frosty and icy conditions.
Today will be off to a cold and windy start with scattered showers.
Highest temperatures of 6 to 8 degrees but it will feel colder.
Tonight will bring frost and ice as the temperature plummets to 0 to 3 degrees.
Here is the forecast for the rest of the week:
Monday: "A cold start with cloud building from the west with outbreaks of rain and drizzle during the morning. Staying a cloudy day with outbreaks of patchy rain at times. Mild with highest temperatures of 8 to 11 degrees and light southerly winds changing to a fresh westerly in the afternoon.
Monday night: "Remaining mild, cloudy and breezy with outbreaks of rain moving into the west and north late evening and overnight. Lowest temperatures of 6 to 10 degrees, in brisk southwest winds.
Tuesday: "Another mild day with blustery outbreaks of rain. However, parts of the east and southeast will stay dry with some sunny spells. Highest temperatures of 10 to 13 degrees in mostly fresh southwest winds.
Tuesday night: "Outbreaks of rain will push down across the country, as westerly winds ease. Colder weather will move in overnight with lowest temperatures of 2 to 6 degrees, coldest across Ulster and Connacht.
Wednesday: "Sunshine and scattered showers, some wintry in the west and northwest. Staying drier and brighter in the east. Highest afternoon temperatures of 4 to 8 degrees but feeling cold in a westerly breeze.
Wednesday night: "A cold evening with a few showers for western and northern areas. Clear and drier in the southeast. Feeling even colder in a brisk westerly breeze. Frost and ice too, especially for sheltered areas overnight with lows of -2 to 2 degrees.
Thursday: "There will be plenty of bright and sunny spells across the country, but a few showers will feed in from the north and west through the day. Highest temperatures of 5 to 8 degrees, but feeling colder in brisk northwesterlies. Cold overnight with lows of -2 to 1 degrees with frost and ice expected.
Friday: "A cold, but bright day with sunny spells and staying mostly dry apart from a few showers in the north and west. Cold in the evening with frost and ice expected again, as temperatures are set to drop below freezing overnight."
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