See exactly when rain will start and stop with a minute-by-minute precipitation nowcast for the next hour.
Compare today's weather with yesterday's data and track temperature trends over time.
Hourly Forecast
Daylight Hours
07:31
Sunrise
19:11
Sunset
Moon
Waxing Gibbous
18:47
Moonrise
05:40
Moonset
Daily Forecast
Today
Saturday
Sunday
Monday
Tuesday
Wednesday
Thursday
Friday
Saturday
Sunday
Air Quality Data Available
Upgrade to access real-time air quality data for Letterkenny Airport.
Resources
UV Index
Humidity
Current stargazing conditions?
See sky darkness, moon phase, and the best viewing window for Letterkenny Airport.
View stargazing scoreWeather in Letterkenny Airport today, September 25, 2026
Letterkenny Airport looks cloudy on September 25, 2026, with grey skies for much of the day. Sunshine stays limited, so the overall tone is muted from the morning onward. The first half of the day looks overcast, as cloud amounts reach about 98% around 10:00. Brighter weather, if it comes, waits until later.
The day peaks near 15°C and cools toward 11°C. Moisture in the air spans 69%-90%, with the highest values around 23:00. A lighter breeze peaks around 13:00 near 6.3 km/h.
Expect persistent cloud later on, with amounts around 100% by 15:00. Sunshine remains the exception, not the rule. Visibility stays generally good near 33.1 km on average, though it can drop toward 22.8 km in thicker cloud or showers. Expect sunrise at 07:31, sunset at 19:11, and 11 hours 39 minutes of sunlight today overall.
In short, cloud leads the story in Letterkenny Airport on September 25, 2026; expect limited sun and a peak around 15°C.
Frequently asked questions about weather in Letterkenny Airport
How warm does it get in Letterkenny Airport?
The warmest month in Letterkenny Airport is August, with average high temperatures of 17°C. The average temperature during this period is around 15°C.
How cold does it get in Letterkenny Airport?
The coldest month in Letterkenny Airport is January, with average low temperatures of 4°C. The average temperature during this period is around 6°C.
What is the wettest time of year in Letterkenny Airport?
The wettest month in Letterkenny Airport is August, with an average of 126mm of precipitation.
What is the driest time of year in Letterkenny Airport?
The driest month in Letterkenny Airport is April, with an average of 80mm of precipitation.
