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September Weather in Headford, Ireland

Last updated: August 23, 2025

In Headford, Ireland, the average temperature in September hovers around 13°C (56°F), with a wide range from a chilly 0°C (33°F) to a warm 25°C (78°F). Expect moderate rainfall, accumulating 78 mm (3.1 in) over approximately 15 days. With an average humidity of 88%, it’s a month that reveals the beauty of wet, crisp days. Stay prepared!

September Temperature in Headford

In September in Headford, the average temperature is 13°C (56°F). Maximums can reach 25°C (78°F), while minimums can drop as low as 0°C (33°F). Packing layers is essential for travelers, as you may experience a wide range of temperatures throughout the day.

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

The chart illustrates September temperature patterns in Headford, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Headford, 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 (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec434344485357605956514644
Data source: Temperature data for Headford 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 Headford

In Headford, in September, the precipitation amount is 78 mm (3.1 in) over a span of 15 days.

September Precipitation Trends in Headford

The chart displays monthly precipitation patterns in Headford, 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 Headford, September typically receives around 78 mm (3.1 inches) of precipitation spread over approximately 15 days.
JanFebMarAprMayJunJulAugSepOctNovDec7512297607080801187811296106
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Headford

In Headford in September, humidity is 88%. With an average temperature of 13°C (56°F), this humidity feels like a thick, warm blanket wrapping around you, making outdoor adventures sticky and challenging.

September Average Humidity in Headford

This chart illustrates the average monthly humidity levels in Headford, 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 Headford is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec89%88%87%86%83%83%85%85%88%91%92%89%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Headford

In Headford 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 Headford.

Maximum UV Index Levels in Headford for September

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

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

This table compares monthly weather conditions in Headford, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather6°C (43°F)75 mm (2.9 inches)88%low
February Weather6°C (44°F)122 mm (4.8 inches)88%low
March Weather7°C (44°F)97 mm (3.8 inches)87%moderate
April Weather9°C (48°F)60 mm (2.3 inches)86%moderate
May Weather12°C (53°F)70 mm (2.7 inches)83%high
June Weather14°C (57°F)80 mm (3.2 inches)83%very high
July Weather15°C (60°F)79 mm (3.1 inches)85%very high
August Weather15°C (59°F)118 mm (4.7 inches)85%high
September Weather13°C (56°F)78 mm (3.1 inches)88%moderate
October Weather10°C (51°F)111 mm (4.4 inches)91%moderate
November Weather8°C (46°F)96 mm (3.8 inches)92%low
December Weather7°C (45°F)106 mm (4.2 inches)89%low

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