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September Weather in Castleblayney, Ireland

Last updated: August 23, 2025

In Castleblayney, Ireland, the average temperature in September hovers around 13°C (56°F). Expect minimums dipping to 2°C (36°F) and maximums reaching a pleasant 23°C (74°F). During this time, you can anticipate 75 mm (3.0 in) of precipitation spread over about 12 days, with an average humidity level of 86%.

September Temperature in Castleblayney

In September in Castleblayney, the average temperature is 13°C (56°F). The maximum can reach 23°C (74°F), while the minimum can be as low as 2°C (36°F). This mild weather makes Castleblayney an ideal destination for travelers looking to explore comfortably.

September Weather in Castleblayney: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Castleblayney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castleblayney, September typically has an average temperature of 13°C (56°F), with highs reaching up to 23°C (74°F) and lows dropping to around 2°C (36°F).
JanFebMarAprMayJunJulAugSepOctNovDec414244475257605955504543
Data source: Temperature data for Castleblayney 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.

September Precipitation in Castleblayney

In Castleblayney in September, the precipitation amount is 75 mm (3.0 in) over the course of 12 days.

September Precipitation Trends in Castleblayney

The chart displays monthly precipitation patterns in Castleblayney, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Castleblayney, September typically receives around 75 mm (3.0 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec5790834970817812075818390
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Castleblayney

In Castleblayney in September, humidity is 86%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket enveloping you, making outdoor activities slightly uncomfortable and prompting travelers to seek shade or air-conditioned spaces frequently.

September Average Humidity in Castleblayney

This chart illustrates the average monthly humidity levels in Castleblayney, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Castleblayney is approximately 86%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%85%83%85%86%85%86%87%87%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Castleblayney

In Castleblayney in September, 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 Castleblayney.

Maximum UV Index Levels in Castleblayney for September

The chart shows the monthly maximum UV Index (UVI) for Castleblayney in September, 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 September, the maximum UV index in Castleblayney typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875321
Data source: Castleblayney September 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 September Weather in Castleblayney Compares to Other Months

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

This table compares monthly weather conditions in Castleblayney, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)57 mm (2.3 inches)85%low
February Weather6°C (43°F)90 mm (3.5 inches)86%low
March Weather7°C (44°F)83 mm (3.3 inches)86%moderate
April Weather8°C (47°F)49 mm (1.9 inches)85%moderate
May Weather11°C (53°F)70 mm (2.8 inches)83%high
June Weather14°C (58°F)81 mm (3.2 inches)85%very high
July Weather16°C (61°F)78 mm (3.1 inches)86%very high
August Weather15°C (59°F)120 mm (4.7 inches)85%high
September Weather13°C (56°F)75 mm (3.0 inches)86%moderate
October Weather10°C (51°F)81 mm (3.2 inches)87%moderate
November Weather7°C (46°F)83 mm (3.3 inches)86%low
December Weather6°C (43°F)90 mm (3.6 inches)84%low

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