Freezing weather is set to hit on Saturday night during the country's first St Brigid's bank holiday weekend.
The mercury will go as low as minus three degrees. There will be frost on Sunday morning but also plenty of sunshine.
Meanwhile, today will be mostly cloudy with isolated drizzle. However, the temperature will stay well above freezing.
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Met Eireann's forecast for the weekend reads:
Today
Today will be mostly cloudy with isolated drizzle and mist and just occasional bright periods. Highest temperatures of 10 to 12 degrees with a moderate to fresh southwesterly breeze.
Tonight
Tonight will be largely cloudy with isolated light rain, drizzle and mist. Lowest temperatures of 5 to 8 degrees with a moderate to fresh southerly wind.
Saturday
Most areas will be dry on Saturday morning but rain will develop in the northwest. The band of rain will move southeast across the country through the day, becoming patchy, and will clear from the southeast by evening. Drier and brighter weather will follow the rain and it will become colder, so afternoon temperatures will range between 6 or 7 degrees in the northwest and 11 degrees in the southeast. Moderate to fresh southerly winds, easing and becoming northwesterly after the rain.
Saturday night
Saturday night will be cold and dry with long clear spells. There will be widespread frost and possibly ice as temperatures fall to between -3 and 0 degrees.
Sunday morning
Sunday morning will be cold and frosty but it will be dry with plenty of sunshine. Cloud will increase through the day and patches of light rain or drizzle will develop in the southwest later. Highest temperatures of 5 to 10 degrees, coldest in Ulster, with light to moderate southerly winds.
Sunday night
Sunday night will be cloudy with patches of light rain and drizzle. Lowest temperatures of 5 to 9 degrees in a light to moderate southerly wind.
Monday
Monday will be mostly cloudy with scattered light rain or drizzle, mainly in Atlantic coastal counties. Highest temperatures of 8 to 10 degrees with light to moderate southerly winds.
Monday night
Monday night will start off mostly cloudy and dry. Rain will develop in the northwest overnight and will edge southeastwards, becoming very patchy. Lowest temperatures of 3 to 8 degrees, coldest later in the northwest once the rain clears.
Tuesday
On Tuesday the cloud and patchy rain will continue clearing southeastwards, but may linger in the southeast into the evening. Highest temperatures of 7 to 10 degrees with light winds.
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