nomadseason

September Weather in Dundrum, United Kingdom

Last updated: August 27, 2025

In September, the average temperature in Dundrum, United Kingdom hovers around 14°C (57°F). Expect a cool minimum of 6°C (44°F) and a pleasant maximum reaching 19°C (67°F). Be prepared for rain with an average precipitation of 83 mm (3.3 in) over 16 days, and brace yourself for high humidity levels at 88%.

September Temperature in Dundrum

In September in Dundrum, the average temperature is 14°C (57°F). The maximum can reach 19°C (67°F), while the minimum can be as low as 6°C (44°F). This mild climate makes Dundrum an ideal destination for travelers looking to enjoy comfortable outdoor activities.

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

The chart illustrates September temperature patterns in Dundrum, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Dundrum, September typically has an average temperature of 14°C (57°F), with highs reaching up to 19°C (67°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec444445475257605957534845
Data source: Temperature data for Dundrum 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 Dundrum

In Dundrum in September, the precipitation amount is 83 mm (3.3 in), occurring over a period of 16 days.

September Precipitation Trends in Dundrum

The chart displays monthly precipitation patterns in Dundrum, 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 Dundrum, September typically receives around 83 mm (3.3 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec69102914360768411583110120107
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Dundrum

In Dundrum in September humidity is 88%. With an average temperature of 14°C (57°F), this humidity feels like a thick blanket enveloping you, making every step feel heavier and giving a sense of stickiness that can drain your energy quickly while exploring.

September Average Humidity in Dundrum

This chart illustrates the average monthly humidity levels in Dundrum, 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 Dundrum is approximately 88%, 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 September generated using information from the Copernicus Climate Change Service.

September UV Index in Dundrum

In Dundrum 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 Dundrum.

Maximum UV Index Levels in Dundrum for September

The chart shows the monthly maximum UV Index (UVI) for Dundrum 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 Dundrum typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec123578865321
Data source: Dundrum 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 Dundrum Compares to Other Months

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

This table compares monthly weather conditions in Dundrum, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (44°F)69 mm (2.7 inches)87%low
February Weather7°C (44°F)101 mm (4.0 inches)86%low
March Weather7°C (45°F)91 mm (3.6 inches)86%moderate
April Weather8°C (47°F)43 mm (1.7 inches)85%moderate
May Weather11°C (52°F)60 mm (2.4 inches)82%high
June Weather14°C (57°F)76 mm (3.0 inches)84%very high
July Weather15°C (60°F)84 mm (3.3 inches)86%very high
August Weather15°C (60°F)115 mm (4.5 inches)86%high
September Weather14°C (57°F)83 mm (3.3 inches)88%moderate
October Weather11°C (53°F)110 mm (4.3 inches)89%moderate
November Weather9°C (48°F)120 mm (4.7 inches)90%low
December Weather7°C (45°F)107 mm (4.2 inches)86%low

Compare Dundrum's Climate with Cities Worldwide