Connacht
Issued at: 21 September 2026 16:30
TODAY - Monday 21st September
It will continue warm, humid and mainly dry for most this evening. There will be plenty of bright or sunny intervals away from western coasts. Here it will be dull with some mist and low cloud. All in light to moderate southwesterly breezes.
TONIGHT
Tonight will be mild, humid and mainly dry with some clear spells and patches of mist or fog. Cloud will increase in the west towards dawn. Lowest temperatures of 14 to 16 degrees with light southerly breezes.
Pollen Forecast
Low on Tuesday and Wednesday.
Solar UV Index
Low on Tuesday and Wednesday.
TOMORROW - Tuesday 22nd September
Tuesday will be mostly cloudy. Rain and drizzle will develop in the far west during the morning. It will spread slowly eastwards through the afternoon and evening, with some eastern parts staying dry all day. Highest temperatures of 14 to 18 degrees with light southerly winds.
National Outlook
Overview: Turning a bit cooler with a fair amount of dry weather and some rain or showers at times.
On Tuesday night, rain in Ulster, Connacht and west Munster will gradually move southeastwards to almost all areas overnight. Lowest temperatures of 11 to 14 degrees with light to moderate south to southwest breezes.
Through Wednesday morning, rain will gradually clear to the southeast. Drier, brighter weather will follow from the west with sunny spells developing. Cooler with highest temperatures of 14 to 17 degrees and light to moderate northwesterly winds.
Wednesday night will be dry with clear spells. Cloud will increase in the west overnight. Lowest temperatures of 6 to 9 degrees with light variable winds backing southeasterly.
Thursday will start off dry with bright or sunny spells in the east. Cloudier further west with rain developing in the west and northwest by early afternoon and then spreading southwards through the rest of the day. Highest temperatures of 15 to 19 degrees with fresh, gusty southerly winds.
On Thursday night, rain will continue for a time and will clear to the east overnight. Lowest temperatures of 10 to 13 degrees with winds becoming southwesterly and easing as rain clears.
Friday will be mainly dry with bright or sunny spells and perhaps a few showers. Highest temperatures of 15 to 18 degrees with moderate to fresh west to southwest winds.
Next weekend looks like it will be unsettled with rain or showers at times and with temperatures in the mid to high teens.
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.