Temperatures could get down to -4C as a status yellow low temperature and ice warning has been issued.
It comes into effect at 9pm and lasts until 10am tomorrow.
It covers the entire country, including Longford, Leitrim and Roscommon.
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Dublin and Wicklow have been issued with a yellow alert for rain until midday today.
Alan O'Reilly from Carlow Weather says there'll be hazardous travelling conditions:
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