nomadseason

September Weather in Castlebellingham, Ireland

Last updated: August 23, 2025

In September, the average temperature in Castlebellingham, Ireland hovers around 13°C (56°F). Expect chilly nights with minimums dropping to 3°C (37°F), while daytime can warm up to a pleasant 22°C (72°F). Be prepared for some wet weather, as 74 mm (2.9 in) of precipitation is expected over 13 days, contributing to an average humidity of 86%.

September Temperature in Castlebellingham

In September in Castlebellingham, the average temperature is 13°C (56°F), with maximums reaching 22°C (72°F) and minimums dropping as low as 3°C (37°F). It's a great time for travelers to enjoy mild weather, making it perfect for outdoor activities and exploration.

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

The chart illustrates September temperature patterns in Castlebellingham, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Castlebellingham, September typically has an average temperature of 13°C (56°F), with highs reaching up to 22°C (72°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec424244475257605956514643
Data source: Temperature data for Castlebellingham 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.

September Precipitation in Castlebellingham

In Castlebellingham in September, the precipitation amount is 74 mm (2.9 in) over the course of 13 days.

September Precipitation Trends in Castlebellingham

The chart displays monthly precipitation patterns in Castlebellingham, 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 Castlebellingham, September typically receives around 74 mm (2.9 inches) of precipitation spread over approximately 13 days.
JanFebMarAprMayJunJulAugSepOctNovDec5485804566767411474808489
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Castlebellingham

In Castlebellingham 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 Castlebellingham

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

In Castlebellingham 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 Castlebellingham.

Maximum UV Index Levels in Castlebellingham for September

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

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

This table compares monthly weather conditions in Castlebellingham, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)54 mm (2.1 inches)85%low
February Weather6°C (43°F)85 mm (3.4 inches)86%low
March Weather7°C (44°F)80 mm (3.1 inches)86%moderate
April Weather8°C (47°F)45 mm (1.8 inches)85%moderate
May Weather11°C (53°F)66 mm (2.6 inches)83%high
June Weather14°C (58°F)76 mm (3.0 inches)85%very high
July Weather16°C (61°F)74 mm (2.9 inches)86%very high
August Weather15°C (59°F)114 mm (4.5 inches)85%high
September Weather13°C (56°F)74 mm (2.9 inches)86%moderate
October Weather10°C (51°F)80 mm (3.1 inches)87%moderate
November Weather8°C (46°F)84 mm (3.3 inches)86%low
December Weather6°C (43°F)89 mm (3.5 inches)84%low

Compare Castlebellingham's Climate with Cities Worldwide