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September Weather in Athy, Ireland

Last updated: August 23, 2025

In September, the average temperature in Athy, Ireland hovers around 13°C (56°F). Expect a range between a chilly 0°C (32°F) at the lowest, swinging up to a warm 26°C (78°F) at the highest. With about 65 mm (2.6 in) of precipitation spread over 12 days, don’t forget your umbrella! The air remains quite humid, with an average humidity of 86%, creating a unique and vibrant atmosphere.

September Temperature in Athy

In September in Athy, the average temperature is 13°C (56°F). The maximum can reach 26°C (78°F), and the minimum can be as low as 0°C (32°F). Be prepared for a mix of mild days and cool evenings when traveling during this time.

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

The chart illustrates September temperature patterns in Athy, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Athy, September typically has an average temperature of 13°C (56°F), with highs reaching up to 26°C (78°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec424344475257615956504543
Data source: Temperature data for Athy 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 Athy

In Athy in September, the precipitation amount is 65 mm (2.6 in) over the course of 12 days.

September Precipitation Trends in Athy

The chart displays monthly precipitation patterns in Athy, 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 Athy, September typically receives around 65 mm (2.6 inches) of precipitation spread over approximately 12 days.
JanFebMarAprMayJunJulAugSepOctNovDec568781526768699365888697
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Athy

In Athy 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 Athy

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

In Athy 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 Athy.

Maximum UV Index Levels in Athy for September

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

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

This table compares monthly weather conditions in Athy, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather5°C (42°F)56 mm (2.2 inches)85%low
February Weather6°C (43°F)87 mm (3.4 inches)86%low
March Weather7°C (44°F)81 mm (3.2 inches)86%moderate
April Weather8°C (47°F)52 mm (2.0 inches)85%moderate
May Weather11°C (53°F)67 mm (2.6 inches)83%high
June Weather14°C (58°F)68 mm (2.7 inches)85%very high
July Weather16°C (61°F)69 mm (2.7 inches)86%very high
August Weather15°C (59°F)93 mm (3.6 inches)85%high
September Weather13°C (56°F)65 mm (2.6 inches)86%moderate
October Weather10°C (51°F)88 mm (3.5 inches)87%moderate
November Weather7°C (46°F)86 mm (3.4 inches)86%low
December Weather6°C (43°F)97 mm (3.8 inches)84%low

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