July Weather in Letterkenny, Ireland

Last updated: August 23, 2025

In July, the average temperature in Letterkenny, Ireland hovers around 15°C (59°F). Expect a minimum of 7°C (46°F) and a balmy maximum of 28°C (82°F). However, be prepared for 98 mm (3.9 in) of precipitation spread over 16 days, with an average humidity of 86% making it feel quite muggy.

July Temperature in Letterkenny

In July in Letterkenny, the average temperature is 15°C (59°F). Maximum temperatures can reach 28°C (82°F), while minimums can drop as low as 7°C (46°F). This pleasant weather makes Letterkenny an ideal destination for outdoor activities and exploration during this time.

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

The chart illustrates July 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, July typically has an average temperature of 15°C (59°F), with highs reaching up to 28°C (82°F) and lows dropping to around 7°C (46°F).

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

July Precipitation in Letterkenny

In Letterkenny in July, the total precipitation amount is 98 mm (3.9 in) recorded over a span of 16 days.

July Precipitation Trends in Letterkenny

The chart displays monthly precipitation patterns in Letterkenny, with values for each month alongside July’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how July’s conditions compare to those of other months. In Letterkenny, July typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 16 days.

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

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Millimeters (mm) Inches (in)

July Humidity in Letterkenny

In Letterkenny in July, humidity is 86%. With an average temperature of 15°C (59°F), this humidity feels like a warm, damp blanket that clings to your skin, making traveling slightly uncomfortable but still manageable if you stay hydrated and take breaks in shaded areas.

July Average Humidity in Letterkenny

This chart illustrates the average monthly humidity levels in Letterkenny, with July’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In July, average humidity in Letterkenny is approximately 86%, offering insight into how humid the weather typically is during this month.

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

July UV Index in Letterkenny

In Letterkenny in July, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Letterkenny.

Maximum UV Index Levels in Letterkenny for July

The chart shows the monthly maximum UV Index (UVI) for Letterkenny in July, 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 July, the maximum UV index in Letterkenny typically reaches 8, which falls under the very high exposure category.

Data source: Letterkenny July 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 July 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 July’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 July’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