nomadseason

October Weather in Greencastle, Ireland

Last updated: August 23, 2025

In October, the average temperature in Greencastle, Ireland hovers around 11°C (53°F). Expect chilly days with a minimum temperature dipping to 5°C (41°F) and a pleasant maximum of 16°C (62°F). However, don't forget your umbrella, as 169 mm (6.6 in) of precipitation falls over 23 days. With an average humidity of 89%, it’s a good idea to be prepared for some damp days!

October Temperature in Greencastle

In October in Greencastle, the average temperature is 11°C (53°F). Maximum temperatures can reach 16°C (62°F), while the minimum can drop as low as 5°C (41°F). This mild weather makes it a great time for exploring and enjoying outdoor activities in Greencastle.

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

The chart illustrates October 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, October typically has an average temperature of 11°C (53°F), with highs reaching up to 16°C (62°F) and lows dropping to around 5°C (41°F).
JanFebMarAprMayJunJulAugSepOctNovDec444344465054575856524846
Data source: Temperature data for Greencastle generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

October Precipitation in Greencastle

In Greencastle in October, the total precipitation amount reaches 169 mm (6.6 in), occurring over the course of 23 days.

October Precipitation Trends in Greencastle

The chart displays monthly precipitation patterns in Greencastle, with values for each month alongside October’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how October’s conditions compare to those of other months. In Greencastle, October typically receives around 169 mm (6.6 inches) of precipitation spread over approximately 23 days.
JanFebMarAprMayJunJulAugSepOctNovDec1071351236179114118165125169150163
Data source: Precipitation data for October generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

October Humidity in Greencastle

In Greencastle in October humidity is 89%. With an average temperature of 11°C (53°F), this humidity feels like a thick, heavy blanket wrapping around you, making outdoor activities uncomfortable and causing fatigue during travel.

October Average Humidity in Greencastle

This chart illustrates the average monthly humidity levels in Greencastle, with October’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In October, average humidity in Greencastle is approximately 89%, 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 October generated using information from the Copernicus Climate Change Service.

October UV Index in Greencastle

In Greencastle in October, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Greencastle, you can check the information here.

Maximum UV Index Levels in Greencastle for October

The chart shows the monthly maximum UV Index (UVI) for Greencastle in October, 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 October, the maximum UV index in Greencastle typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124568875321
Data source: Greencastle October 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 October 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 October’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 October’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

Compare Greencastle's Climate with Cities Worldwide