Ulster
Issued at: 20 May 2025 12:00
TODAY - Tuesday 20th May
There will be some sunny spells this afternoon, but cloud will gradually increase and showers will develop in many areas. Some of the showers will be heavy with spot flooding and isolated thunderstorms possible. Highest temperatures of 17 to 19 degrees with light southerly or variable winds.
TONIGHT
Any lingering showers will die out early tonight and it will become dry with clear spells. A few mist and fog patches will develop towards dawn. Lowest temperatures of 4 to 8 degrees with light and variable winds.
Pollen Forecast
Moderate today. High on Wednesday.
Solar UV Index
Moderate today and Wednesday
TOMORROW - Wednesday 21st May
Tomorrow, Wednesday will be dry and bright with good sunny spells and light to moderate northerly winds. Highest temperatures of 18 to 21 degrees generally, but it will be a few degrees cooler in coastal parts of the north and northwest.
National Outlook
Overview: Mainly dry up to Friday. Becoming more unsettled over the weekend with rain or showers spreading from the west.
Wednesday night will be dry with isolated mist patches around dawn. Lowest temperatures of 4 to 9 degrees in light to moderate northwest breezes.
Thursday will be largely dry with patchy cloud and sunny spells and just the odd light shower possible. Light to moderate northerly winds will bring a fresher feel to northern parts of Ulster and Connacht as well as near the Leinster coast with highest temperatures of just 14 to 16 degrees, but ranging from 17 to 21 degrees elsewhere.
Friday will start off dry with sunny spells. Cloud will increase from the west. Rain or drizzle will develop in the west towards evening and spread eastwards. Amounts will be small. Highest temperatures 14 to 18 degrees with light to moderate variable breezes. Friday night will be mostly cloudy with patchy light rain, drizzle at first and with more persistent rain spreading eastwards overnight. Lowest temperatures of 10 to 14 degrees.
Saturday morning will be mostly cloudy with rain in most areas. The rain will gradually clear eastwards with scattered showers following from the west. Highest temperatures of 15 to 19 degrees with moderate to fresh southerly winds becoming southwesterly as rain clears.
Sunday will be a bright day with sunny spells and scattered showers, most frequent in the west. It will be cooler and fresher with highest temperatures of 12 to 6 degrees and fresh, gusty west to southwest winds.
Early next week will continue cool and mixed with rain or showers 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.