National Forecast
Issued at: 04 January 2026 14:43
TODAY - Sunday 4th January
Treacherous conditions in places for the rest of today with lingering frost and ice. Sunny spells and scattered wintry showers of sleet and snow will occur, mainly across north and northwest counties with local accumulations and perhaps the odd rumble of thunder. Rain will affect southwest counties for a time also, turning to sleet or snow over higher ground here. As well as this, a few snow flurries will feed into north Leinster later this evening, bringing the potential for a light dusting. Very cold with highest temperatures of only 1 to 5 degrees in light to moderate westerly winds.
TONIGHT
Very cold overnight with a widespread sharp to severe frost and icy stretches. Scattered wintry showers will continue, mainly in the North and West, with local snow accumulations and impaired visibility. A few well scattered snow flurries will also feed into the other areas too with a light dusting. Patches of fog or freezing fog may form also. Lowest temperatures of -6 to -1 degrees in light to moderate northwesterly winds.
TOMORROW - Monday 5th January
Monday will be another very cold and treacherous start with frost, ice and fog or freezing fog patches slow to clear. Some lying snow in places too, mainly across north and northwest counties. Dry and sunny day for most areas, with wintry showers mainly confined to north and northwest fringes by late morning. Highest temperatures of only 1 to 6 degrees in light to moderate northwest to west winds.
National Outlook
Overview: Our weather is set to turn more unsettled as low pressure takes charge with rain spreading from the Atlantic.
Monday night: Showers will spread eastwards across the country early on in the night, clearing to leave dry and clear conditions before cloud builds from the west later. Lowest temperatures of -3 to +1 degrees with frost and icy stretches forming early on, in light to moderate southwest winds.
Tuesday: Cloud and rain will move in across the western half of the country through the morning, possibly turning to sleet. The rain and sleet will clear southeastwards through the day and will be followed by sunny spells and scattered showers. Highest temperatures of 3 to 8 degrees in light to moderate southwest winds, veering northwesterly through the evening.
Tuesday night: Any showers along Atlantic coasts will die out early on becoming dry overnight with clear spells. Cloud will build from the west through the night. Lowest temperatures of -2 to 2 degrees in light northwest to west winds.
Wednesday: Rain will spread across the country from the west through Wednesday, possibly turning to sleet over higher ground. Staying cold in the east with highest temperatures of 1 to 4 degrees but milder further west with highest temperatures of 4 to 9 degrees. Moderate south to southwest winds.
Wednesday night: Rain looks to clear eastwards early on in the night with clear spells and isolated showers following. Lowest temperatures of 0 to 5 degrees in light westerly or variable winds.
Thursday: There is uncertainty in the forecast for Thursday but it's possible that rain will move over the southern half of the country with showers further north. Highest temperatures of 2 to 6 degrees in moderate to fresh southwest winds.
Temperature circle (°C): maximum and minimum temperature forecast for each day. Wind symbol (km/h): arrow points in the direction the wind is blowing. The weather and wind icons: for the time of maximum temperature and minimum temperature.