Letterkenny Weather & Climate: Best Time to Visit
Letterkenny, Donegal County, Ireland, experiences moderate temperature changes through the seasons. July is the warmest month with daytime highs of 19°C (66°F), while February is the coolest at 9°C (48°F).
With around 1281 mm (50 in) of annual rainfall, Letterkenny has a notably wet climate. The wettest month is December. The most sunshine falls in May, with an average of 6.8 hours of daily sunshine.
Monthly Temperature in Letterkenny
The weather in Letterkenny changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a pleasant 19°C (66°F) in July. In February, the coolest month of the year, temperatures drop to a chilly 9°C (48°F).
At night, temperatures range from around 12°C (54°F) in July to 3°C (37°F) in February.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Letterkenny
Letterkenny has a relatively rainy climate with high precipitation levels, averaging 1281 mm (50 in) of rainfall annually. Despite minor fluctuations, Letterkenny enjoys fairly consistent precipitation throughout the year. In December, you can expect around 119 mm (4.7 in) of precipitation, while in April, Letterkenny receives about 91 mm (3.6 in). For more details, please visit our Letterkenny Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Letterkenny
Letterkenny can be enjoyed more throughout the sunniest month of May under a blue sky, with approximately 6.8 hours of sunshine daily. In contrast, the city experiences much darker days in December, with only 1.3 hours of sunlight per day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Letterkenny 3-Day Forecast
Check the conditions for any month of the year.
Best Time to Visit Letterkenny
During the months of June, July, August and September, Letterkenny enjoys pleasant weather with average temperatures ranging from 17°C (62°F) to 19°C (65°F). These months are perfect for sightseeing and exploring.Rainfall during this time ranges from 99 mm (3.9 in) in September to 115 mm (4.5 in) in August. This means you can expect a mix of sunny days and occasional showers. Ready to plan your travels but need destination ideas? Our smart tool recommends places based on the climate conditions you prefer. Start planning with our destination weather tool.
