Ulster
Issued at: 30 December 2025 17:30
TONIGHT
Cold and dry tonight with clear spells. Lowest temperatures of -4 to 0 degrees with frost and ice developing on untreated surfaces. Light variable breezes or near calm conditions will allow some fog or freezing fog to develop.
Solar UV Index
Low.
TOMORROW - Wednesday 31st December
Fog will clear through tomorrow morning to leave a dry day with a mix of cloud and sunny spells. Highest temperatures of 3 to 7 degrees. Light variable breezes at first will gradually become westerly, increasing moderate towards the evening as showers begin to move into northern coasts.
National Outlook
Overview: High pressure continuing to dominate bringing plenty of dry weather though there will be some light rain or showers at times. Turning colder for the weekend with sharp to severe frosts developing.
New Year's Eve night (Wednesday): Rather cloudy early in the night with some light rain sinking southwards. Clear spells and showers will follow from the north. Lowest temperatures of -2 to +3 degrees with frost and icy stretches developing. Light to moderate westerly winds will increase fresh at times for northern and northwestern coasts.
New Year's Day (Thursday): Cloud and patchy light rain in Munster and south Leinster will slowly clear southwards through the day. Elsewhere, there will be sunshine and well scattered showers, most frequent for northern coastal areas. Highest temperatures of 5 to 8 or 9 degrees in light to moderate northwesterly winds, fresher near northern and northwestern coasts.
Thursday night: Dry for most with clear spells and just a few wintry showers. However, it will turn cloudier over Ulster through the night with more frequent showers developing. Lowest temperatures of -1 to +3 or 4 degrees in mostly light to moderate northwesterly winds.
Friday: A day of sunny spells and showers with some falls of sleet and snow possible. Highest temperatures of 2 to 6 degrees generally in light to moderate northwesterly winds, fresh near exposed coasts.
Friday night: Mostly dry and clear with just some wintry showers in the north and northwest. Lowest temperatures of -2 to +2 degrees in light northwest to moderate northwest winds.
Saturday and Sunday: Very cold and mostly dry though some wintry showers will occur, mainly in the north and northwest. Daytime highs will reach just 1 to 5 degrees in mostly light to moderate northwesterly winds. Sharp frosts and ice will develop during the nights.
Further Outlook: Continuing cold into early next week. While there will still be plenty of dry weather, there will be some wintry showers or falls of rain at times.
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.