Letterkenny Weather in April
April in Letterkenny averages 12°C (54°F) during the day and 5°C (41°F) at night. With just 91 mm (3.6 in) of rainfall on average, it doesn't get much drier than this.
Rainfall in Letterkenny in April
With the driest weather of the year, this month is a solid choice for exploring, even if you'll want to dress warmly. Past climate data indicates that roughly 18 days will see rain, totalling around 91 mm (3.6 in) for the month. A fairly balanced picture this month, some wet days but nothing too extreme in terms of intensity.
Temperature in Letterkenny in April
Daytime temperatures in Letterkenny reach 12°C (54°F) in April, dropping to 5°C (41°F) at night. Conditions are often most pleasant around the middle of the day. With lows around 5°C (41°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Letterkenny in April
The month experiences a moderate amount of sunlight, with 156 hours of sunshine. This provides a nice balance between sunshine and clouds.Our weather planner can help you find worldwide destinations with pleasant weather during this period. May, July, August and September typically offer the best weather for Letterkenny.
Letterkenny Temperature in April
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Letterkenny Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Letterkenny - and find the best time to visit.
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Letterkenny typically stay consistent throughout April, with daily highs averaging around 12°C (54°F). Nights are cold, with lows typically ranging from 4°C (39°F) to 6°C (43°F).
Average temperatures in April
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in April
Historical weather records for Letterkenny in April
Browse day-by-day weather records for Letterkenny spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Letterkenny historical weather extremes in April
The extremes listed below come from historical weather data collected in Letterkenny from 1976 through 2026.
- Letterkenny recorded its highest April temperature of 22°C (72°F) on April 30, 2025.
- The coldest April day was on April 10, 1978, with a maximum of 3°C (37°F).
- Letterkenny registered its coldest April night on April 6, 2013, with temperatures dropping to -4°C (25°F).
Best Places in Ireland in April
Find out more about the weather in Ireland and which places have the best travel conditions in this month. See all of Ireland in April →
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Letterkenny in April
Pack for changing conditions in Letterkenny in April. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Prepare for significant rainfall with proper waterproof clothing and shoes. Sunglasses could come in handy during the sunnier parts of your trip.
What To Do in Letterkenny in April
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming5/10 -
Cycling6/10 -
Walking6/10 -
Camping4/10 -
Outdoor sports6/10
Letterkenny 3-Day Forecast
See the full Letterkenny climate overview or explore weather in Ireland.
Popular in April
Where to go in April - average daytime high across popular destinations.
Kilkenny
13°C (55°F) Galway
14°C (57°F) Kenmare13°C (55°F) Killarney13°C (55°F) Doolin12°C (54°F) Westport13°C (55°F) Cork
13°C (55°F) Dublin13°C (55°F) 
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