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Letterkenny Climate by Month

The temperature in Letterkenny varies moderately throughout the year. The temperatures shift from pleasant to cold. It also experiences much rainfall throughout the year. Let's now guide you through the climate details for a complete overview.

Average day and night temperature

The weather in Letterkenny changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a pleasant 19°C in July. In February, the coolest month of the year, temperatures drop to a chilly 9°C. At night, expect cooler temperatures, averaging 3°C during this month.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Letterkenny has a relatively rainy climate with high precipitation levels, averaging 1281 mm of rainfall annually. Despite minor fluctuations, Letterkenny enjoys fairly consistent precipitation throughout the year. In December, you can expect around 119 mm of precipitation, while in April, Letterkenny receives about 91 mm.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

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.

Monthly hours of sunshine

Data from: Derry, Ireland (27 KM, 17 Miles).

Daily hours of sunshine

Data from: Derry, Ireland (27 KM, 17 Miles).

The best time of year to visit Letterkenny in Ireland

Other facts from our historical weather data:
  • Which is the warmest month in Letterkenny?
    July has an average maximum temperature of 19°C and is the warmest month of the year.
  • Which is the coldest month in Letterkenny?
    The coldest month is February with an average maximum temperature of 9°C.
  • Which is the wettest month in Letterkenny?
    December tops the wettest month list with 119 mm of rainfall.
  • Which is the driest month in Letterkenny?
    April is the driest month with 91 mm of precipitation.
  • Which is the sunniest month in Letterkenny?
    May is the sunniest month with an average of 203 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Letterkenny

    Fri   Dec 13
    6°C | -1°C
    SW 11 km/h
    0.4 mm
    broken clouds and  chance of slight rain

    broken clouds and chance of slight rain

    Sat   Dec 14
    12°C | 2°C
    SW 18 km/h
    2.8 mm
    overcast and slight rain

    overcast and slight rain

    Sun   Dec 15
    12°C | 10°C
    W 32 km/h
    1 mm
    overcast and slight rain

    overcast and slight rain