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June Weather in Greencastle, Ireland

Last updated: August 23, 2025

In June, the average temperature in Greencastle, Ireland hovers around 12°C (54°F), with minimums dipping to 8°C (47°F) and highs reaching 18°C (65°F). Expect a fairly wet month, as precipitation measures around 114 mm (4.5 in) over approximately 17 days. Additionally, the air tends to be quite humid, with an average humidity level of 84%.

June Temperature in Greencastle

In June in Greencastle, the average temperature is 12°C (54°F). The maximum can reach 18°C (65°F), while the minimum can drop to as low as 8°C (47°F). It’s a mild time to visit Greencastle, perfect for outdoor activities and exploring the local culture.

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

The chart illustrates June 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, June typically has an average temperature of 12°C (54°F), with highs reaching up to 18°C (65°F) and lows dropping to around 8°C (47°F).
JanFebMarAprMayJunJulAugSepOctNovDec444344465054575856524846
Data source: Temperature data for Greencastle generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

June Precipitation in Greencastle

In Greencastle in June, the precipitation amount is 114 mm (4.5 in) recorded over 17 days.

June Precipitation Trends in Greencastle

The chart displays monthly precipitation patterns in Greencastle, with values for each month alongside June’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how June’s conditions compare to those of other months. In Greencastle, June typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 17 days.
JanFebMarAprMayJunJulAugSepOctNovDec1071351236179114118165125169150163
Data source: Precipitation data for June generated using information from the Copernicus Climate Change Service.
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June Humidity in Greencastle

In Greencastle in June, humidity is 84%. With an average temperature of 12°C (54°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and sticky.

June Average Humidity in Greencastle

This chart illustrates the average monthly humidity levels in Greencastle, with June’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In June, average humidity in Greencastle is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%86%86%85%82%84%86%86%88%89%90%87%
Data source: Humidity data for June generated using information from the Copernicus Climate Change Service.

June UV Index in Greencastle

In Greencastle in June, 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 June

The chart shows the monthly maximum UV Index (UVI) for Greencastle in June, 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 June, the maximum UV index in Greencastle typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124568875321
Data source: Greencastle June 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 June 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 June’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 June’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (44°F)106 mm (4.2 inches)87%low
February Weather6°C (44°F)135 mm (5.3 inches)86%low
March Weather7°C (44°F)123 mm (4.8 inches)86%moderate
April Weather8°C (47°F)61 mm (2.4 inches)85%moderate
May Weather10°C (51°F)79 mm (3.1 inches)82%high
June Weather12°C (54°F)114 mm (4.5 inches)84%very high
July Weather14°C (57°F)118 mm (4.7 inches)86%very high
August Weather14°C (58°F)165 mm (6.5 inches)86%high
September Weather13°C (56°F)125 mm (4.9 inches)88%moderate
October Weather11°C (53°F)169 mm (6.6 inches)89%moderate
November Weather9°C (49°F)150 mm (5.9 inches)90%low
December Weather8°C (46°F)163 mm (6.4 inches)86%low

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