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September Weather in Rathdowney, Ireland

Last updated: August 23, 2025

In September, the average temperature in Rathdowney, Ireland hovers around 13°C (56°F). Expect minimums that can dip to 0°C (33°F) and maximums reaching 25°C (78°F). With an average humidity of 88%, prepare for a moist atmosphere, while 61 mm (2.4 in) of precipitation over approximately 11 days indicates there's a fair chance of rain, so don't forget your umbrella!

September Temperature in Rathdowney

In September in Rathdowney, 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 Rathdowney: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Rathdowney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Rathdowney, 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).
JanFebMarAprMayJunJulAugSepOctNovDec424343475257605955504543
Data source: Temperature data for Rathdowney 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 Rathdowney

In Rathdowney in September, the total precipitation amount is 61 mm (2.4 in) over the course of 11 days.

September Precipitation Trends in Rathdowney

The chart displays monthly precipitation patterns in Rathdowney, 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 Rathdowney, September typically receives around 61 mm (2.4 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec5495835664676993628884105
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Rathdowney

In Rathdowney 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 Rathdowney

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

In Rathdowney 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 Rathdowney.

Maximum UV Index Levels in Rathdowney for September

The chart shows the monthly maximum UV Index (UVI) for Rathdowney 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 Rathdowney typically reaches 5, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec124578875421
Data source: Rathdowney 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 Rathdowney Compares to Other Months

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

This table compares monthly weather conditions in Rathdowney, 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)88%low
February Weather6°C (43°F)95 mm (3.7 inches)88%low
March Weather6°C (44°F)83 mm (3.3 inches)87%moderate
April Weather8°C (47°F)56 mm (2.2 inches)86%moderate
May Weather11°C (52°F)64 mm (2.5 inches)83%high
June Weather14°C (57°F)66 mm (2.6 inches)83%very high
July Weather16°C (61°F)69 mm (2.7 inches)85%very high
August Weather15°C (59°F)93 mm (3.6 inches)85%high
September Weather13°C (56°F)61 mm (2.4 inches)88%moderate
October Weather10°C (51°F)88 mm (3.5 inches)91%moderate
November Weather7°C (46°F)84 mm (3.3 inches)92%low
December Weather6°C (43°F)105 mm (4.1 inches)89%low

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