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September Weather in Killala, Ireland

Last updated: August 23, 2025

In September, the average temperature in Killala, Ireland is a mild 13°C (56°F). Expect minimums dropping to 6°C (44°F) and highs reaching up to 21°C (70°F). Be prepared for 114 mm (4.5 in) of precipitation spread over approximately 20 days, accompanied by a high average humidity level of 87%.

September Temperature in Killala

In September in Killala, the average temperature is 13°C (56°F), with maximums reaching 21°C (70°F) and minimums dropping as low as 6°C (44°F). It's a great time to enjoy mild weather and explore the local sights comfortably.

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

The chart illustrates September temperature patterns in Killala, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Killala, September typically has an average temperature of 13°C (56°F), with highs reaching up to 21°C (70°F) and lows dropping to around 6°C (44°F).
JanFebMarAprMayJunJulAugSepOctNovDec444445485255585856524846
Data source: Temperature data for Killala 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 Killala

In Killala in September, the precipitation amount is 114 mm (4.5 in) over a period of 20 days.

September Precipitation Trends in Killala

The chart displays monthly precipitation patterns in Killala, 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 Killala, September typically receives around 114 mm (4.5 inches) of precipitation spread over approximately 20 days.
JanFebMarAprMayJunJulAugSepOctNovDec1091411256879102107162114162148152
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Killala

In Killala in September humidity is 87%. With an average temperature of 13°C (56°F), this humidity feels like a damp blanket wrapping around you, making it challenging to explore comfortably.

September Average Humidity in Killala

This chart illustrates the average monthly humidity levels in Killala, 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 Killala is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%83%84%83%84%86%86%87%87%88%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Killala

In Killala 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 Killala.

Maximum UV Index Levels in Killala for September

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

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

This table compares monthly weather conditions in Killala, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)109 mm (4.3 inches)84%low
February Weather7°C (44°F)141 mm (5.5 inches)84%low
March Weather7°C (45°F)125 mm (4.9 inches)83%moderate
April Weather9°C (48°F)68 mm (2.7 inches)84%moderate
May Weather11°C (52°F)79 mm (3.1 inches)83%high
June Weather13°C (55°F)102 mm (4.0 inches)83%very high
July Weather15°C (59°F)107 mm (4.2 inches)86%very high
August Weather15°C (59°F)162 mm (6.4 inches)86%high
September Weather13°C (56°F)114 mm (4.5 inches)87%moderate
October Weather11°C (52°F)162 mm (6.4 inches)87%moderate
November Weather9°C (48°F)148 mm (5.8 inches)88%low
December Weather8°C (46°F)152 mm (6.0 inches)84%low

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