April Weather in Letterkenny, Ireland

Last updated: August 23, 2025

In Letterkenny, Ireland, the average temperature in April hovers around 8°C (47°F). It can drop to a chilly -1°C (31°F) at its lowest, while the mercury may rise to a pleasant 21°C (70°F) at its peak. Expect 59 mm (2.3 in) of precipitation spread over about 14 days, and experience a high average humidity of 84% that adds to the overall atmosphere.

April Temperature in Letterkenny

In April in Letterkenny, the average temperature is 8°C (47°F). The maximum can reach 21°C (70°F) and the minimum can be as low as -1°C (31°F). This makes it an ideal time for travelers to enjoy outdoor activities while being prepared for varying weather conditions.

April Weather in Letterkenny: Daily Temperature Highs, Lows, and Averages

The chart illustrates April temperature patterns in Letterkenny, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Letterkenny, April typically has an average temperature of 8°C (47°F), with highs reaching up to 21°C (70°F) and lows dropping to around -1°C (31°F).

Data source: Temperature data for Letterkenny generated using information from the Copernicus Climate Change Service.

April Precipitation in Letterkenny

In Letterkenny in April, the total precipitation amount is 59 mm (2.3 in) spread over 14 days.

April Precipitation Trends in Letterkenny

The chart displays monthly precipitation patterns in Letterkenny, with values for each month alongside April’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how April’s conditions compare to those of other months. In Letterkenny, April typically receives around 59 mm (2.3 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for April generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

April Humidity in Letterkenny

In Letterkenny in April, humidity is 84%. With an average temperature of 8°C (47°F), this humidity feels like a damp blanket wrapping around you, making travel feel heavy and a bit lethargic, as the air thickens with moisture and each step becomes a little more cumbersome.

April Average Humidity in Letterkenny

This chart illustrates the average monthly humidity levels in Letterkenny, with April’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In April, average humidity in Letterkenny is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for April generated using information from the Copernicus Climate Change Service.

April UV Index in Letterkenny

In Letterkenny in April, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Letterkenny.

Maximum UV Index Levels in Letterkenny for April

The chart shows the monthly maximum UV Index (UVI) for Letterkenny in April, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In April, the maximum UV index in Letterkenny typically reaches 5, which falls under the moderate exposure category.

Data source: Letterkenny April UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How April Weather in Letterkenny Compares to Other Months

Weather in Letterkenny varies notably across the year, with each month offering distinct climate conditions. This page compares April’s weather to other months in Letterkenny, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Letterkenny, showing how April’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	6°C (43°F)	85 mm (3.3 inches)	84%	low
February Weather	6°C (42°F)	123 mm (4.8 inches)	84%	low
March Weather	6°C (44°F)	111 mm (4.4 inches)	83%	moderate
April Weather	8°C (47°F)	59 mm (2.3 inches)	84%	moderate
May Weather	11°C (52°F)	81 mm (3.2 inches)	83%	high
June Weather	13°C (56°F)	102 mm (4.0 inches)	83%	very high
July Weather	15°C (59°F)	98 mm (3.9 inches)	86%	very high
August Weather	14°C (58°F)	146 mm (5.8 inches)	86%	high
September Weather	13°C (55°F)	104 mm (4.1 inches)	87%	moderate
October Weather	10°C (51°F)	124 mm (4.9 inches)	87%	moderate
November Weather	8°C (46°F)	108 mm (4.2 inches)	88%	low
December Weather	6°C (44°F)	124 mm (4.9 inches)	84%	low