Today
Mist and fog patches will clear this morning and many areas will be dry for a time, but some scattered showers will occur, mainly in the eastern half of the country and in the northwest.
A band of more persistent rain will move in across Connacht and west Ulster later this afternoon and early this evening, extending southeastwards later, but becoming patchy.
Maximum temperatures 8 to 13 Celsius, coldest in the northwest, in light to moderate mainly southwesterly breezes, strengthening along west and northwest coasts this afternoon.
Tonight
Tonight will be very cold, with clear spells and showers.
Most of the showers will be in the western half of the country, some of hail and sleet, with a risk of thunder in Atlantic coastal areas.
Some snow showers are possible also, mainly over high ground, but possibly at lower levels also, mainly in the northwest.
The east and southeast will be mainly dry. Minimum temperatures 0 to 4 Celsius, with some frost, especially in the north and east.
Winds mostly light to moderate west to northwest, but strong along Atlantic coats.