July Weather in Greencastle, Ireland

Last updated: August 23, 2025

In July, the average temperature in Greencastle, Ireland hovers around 14°C (57°F). You can expect minimums of 10°C (51°F) and maximums reaching 20°C (69°F). Be prepared for 118 mm (4.7 in) of precipitation spread over 16 days, with an average humidity of 86%.

July Temperature in Greencastle

In July in Greencastle, the average temperature is 14°C (57°F), with maximums reaching 20°C (69°F) and minimums dropping to as low as 10°C (51°F). This mild climate makes Greencastle an ideal destination for travelers seeking comfortable weather for outdoor activities and exploration.

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

The chart illustrates July temperature patterns in Greencastle, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Greencastle, July typically has an average temperature of 14°C (57°F), with highs reaching up to 20°C (69°F) and lows dropping to around 10°C (51°F).

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

July Precipitation in Greencastle

In Greencastle in July, the total precipitation amount is 118 mm (4.7 in) spread over 16 days.

July Precipitation Trends in Greencastle

The chart displays monthly precipitation patterns in Greencastle, 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 Greencastle, July typically receives around 118 mm (4.7 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 Greencastle

In Greencastle in July humidity is 86%. With an average temperature of 14°C (57°F), this humidity feels like a heavy blanket enveloping you, making travel feel oppressive and uncomfortably sticky.

July Average Humidity in Greencastle

This chart illustrates the average monthly humidity levels in Greencastle, 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 Greencastle 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 Greencastle

In Greencastle 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 Greencastle.

Maximum UV Index Levels in Greencastle for July

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

Data source: Greencastle 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 Greencastle Compares to Other Months

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

This table compares monthly weather conditions in Greencastle, showing how July’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	7°C (44°F)	106 mm (4.2 inches)	87%	low
February Weather	6°C (44°F)	135 mm (5.3 inches)	86%	low
March Weather	7°C (44°F)	123 mm (4.8 inches)	86%	moderate
April Weather	8°C (47°F)	61 mm (2.4 inches)	85%	moderate
May Weather	10°C (51°F)	79 mm (3.1 inches)	82%	high
June Weather	12°C (54°F)	114 mm (4.5 inches)	84%	very high
July Weather	14°C (57°F)	118 mm (4.7 inches)	86%	very high
August Weather	14°C (58°F)	165 mm (6.5 inches)	86%	high
September Weather	13°C (56°F)	125 mm (4.9 inches)	88%	moderate
October Weather	11°C (53°F)	169 mm (6.6 inches)	89%	moderate
November Weather	9°C (49°F)	150 mm (5.9 inches)	90%	low
December Weather	8°C (46°F)	163 mm (6.4 inches)	86%	low