Two freezing cold nights are expected this week as temperatures swing from a comfortable 16C during the day to -1C after dark.
Met Eireann are forecasting the sub-zero temperatures on both Wednesday and Thursday night after the mercury drops as low as 0C tonight.
The forecaster said: "A mix of cloud and sunny spells for the rest of the afternoon and evening. Most places will stay dry but there will be a few light showers, mainly in the midlands. Showers will become isolated through the evening. Temperatures of 12 to 16 degrees, coolest along the east coast and mildest in the west, with light to moderate east to southeast breezes.
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"Tonight will be dry and chilly with lingering showers slowly dying out. Lowest temperatures will range between 0 to 5 degrees with some grass frost forming under long clear spells. Light easterly or variable breezes will allow some mist and hill fog to develop in places."
Thursday will again see a very pleasant day but with temperatures taking a major swing in the early hours of the morning.
The forecaster added: "Some mist or fog patches in parts Wednesday morning will clear with some sunny spells developing for a largely dry morning. Becoming cloudier later in the morning and into the afternoon with a few showers breaking out. Highest temperatures of 11 to 16 degrees, coolest in the northeast and mildest in the west and southwest, in light to moderate easterly breezes.
"Dry and mostly clear overnight apart from the odd shower. Chilly as well with lowest temperatures of -1 to +4 degrees in light breezes. Some mist and fog patches will develop.
"A cloudier day Thursday than previous days but there will still be some sunny spells. Staying mostly dry with just the odd passing shower. Highest temperatures of 11 to 15 degrees in mostly light easterly breezes.
"Dry, clear and chilly overnight. Mist and fog patches will form again with light breezes or near calm conditions. Lowest temperatures of -1 to +4 degrees."
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