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September Weather in Castledermot, Ireland

Last updated: August 23, 2025

In Castledermot, Ireland, the average temperature in September hovers around 13°C (56°F), with a minimum dipping to 0°C (32°F) and a maximum rising to 25°C (78°F). Expect about 67 mm (2.6 in) of precipitation over 13 days, accompanied by an average humidity of 86%. Plan your activities accordingly!

September Temperature in Castledermot

In September in Castledermot, the average temperature is 13°C (56°F). Maximum temperatures can reach 25°C (78°F), while minimum temperatures can drop as low as 0°C (32°F). It's a great time to explore Castledermot, as the mild weather is perfect for outdoor activities and sightseeing.

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

The chart illustrates September temperature patterns in Castledermot, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castledermot, September typically has an average temperature of 13°C (56°F), with highs reaching up to 25°C (78°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec414243475257605955504543
Data source: Temperature data for Castledermot 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 Castledermot

In Castledermot in September, the precipitation amount is 67 mm (2.6 in) spread over 13 days.

September Precipitation Trends in Castledermot

The chart displays monthly precipitation patterns in Castledermot, 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 Castledermot, September typically receives around 67 mm (2.6 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec588983557070719367909196
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Castledermot

In Castledermot 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 Castledermot

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

In Castledermot 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 Castledermot.

Maximum UV Index Levels in Castledermot for September

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

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

This table compares monthly weather conditions in Castledermot, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (41°F)58 mm (2.3 inches)85%low
February Weather6°C (42°F)89 mm (3.5 inches)86%low
March Weather6°C (44°F)83 mm (3.3 inches)86%moderate
April Weather8°C (47°F)55 mm (2.2 inches)85%moderate
May Weather11°C (52°F)70 mm (2.8 inches)83%high
June Weather14°C (57°F)70 mm (2.7 inches)85%very high
July Weather16°C (61°F)71 mm (2.8 inches)86%very high
August Weather15°C (59°F)93 mm (3.7 inches)85%high
September Weather13°C (56°F)67 mm (2.6 inches)86%moderate
October Weather10°C (50°F)90 mm (3.5 inches)87%moderate
November Weather7°C (45°F)91 mm (3.6 inches)86%low
December Weather6°C (43°F)96 mm (3.8 inches)84%low

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