nomadseason

September Weather in Killarney, Australia

Last updated: August 22, 2025

In Killarney, Australia, the average temperature for September hovers around 15°C (60°F). However, temperatures can vary widely, with a minimum of -1°C (31°F) and highs reaching 33°C (91°F). Expect some rain, with an average precipitation of 12 mm (0.5 in) during about 3 days of the month. The average humidity stands at a comfortable 69%, creating a diverse climate experience.

September Temperature in Killarney

In September in Killarney, the average temperature is 15°C (60°F), with maximums reaching 33°C (91°F) and minimums dropping as low as -1°C (31°F). This varied temperature makes it essential for travelers to pack layers to comfortably enjoy both warm and cool moments during their stay.

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

The chart illustrates September temperature patterns in Killarney, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Killarney, September typically has an average temperature of 15°C (60°F), with highs reaching up to 33°C (91°F) and lows dropping to around -1°C (31°F).
JanFebMarAprMayJunJulAugSepOctNovDec737269635752515359646872
Data source: Temperature data for Killarney 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 Killarney

In Killarney in September, the precipitation amount is 12 mm (0.5 in) during a span of 3 days.

September Precipitation Trends in Killarney

The chart displays monthly precipitation patterns in Killarney, 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 Killarney, September typically receives around 12 mm (0.5 inches) of precipitation spread over approximately 3 days.
JanFebMarAprMayJunJulAugSepOctNovDec59791142020282917121086198
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Killarney

In Killarney in September, humidity is 69%. With an average temperature of 15°C (60°F), this humidity feels like a cool, damp embrace that can make outdoor activities feel slightly heavier and more exhausting, but still inviting for exploring the charming sights and sounds of the area.

September Average Humidity in Killarney

This chart illustrates the average monthly humidity levels in Killarney, 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 Killarney is approximately 69%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec69%69%75%79%76%77%72%73%69%61%60%69%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Killarney

In Killarney in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Killarney.

Maximum UV Index Levels in Killarney for September

The chart shows the monthly maximum UV Index (UVI) for Killarney 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 Killarney typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1615141075589121415
Data source: Killarney 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 Killarney Compares to Other Months

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

This table compares monthly weather conditions in Killarney, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather23°C (74°F)59 mm (2.3 inches)69%extreme
February Weather22°C (72°F)79 mm (3.1 inches)69%extreme
March Weather21°C (69°F)114 mm (4.5 inches)75%extreme
April Weather17°C (63°F)20 mm (0.8 inches)79%very high
May Weather14°C (57°F)20 mm (0.8 inches)76%high
June Weather11°C (52°F)28 mm (1.1 inches)77%moderate
July Weather11°C (52°F)29 mm (1.2 inches)72%moderate
August Weather12°C (53°F)17 mm (0.7 inches)73%very high
September Weather15°C (60°F)12 mm (0.5 inches)69%very high
October Weather18°C (65°F)108 mm (4.3 inches)61%extreme
November Weather20°C (68°F)61 mm (2.4 inches)60%extreme
December Weather22°C (72°F)98 mm (3.8 inches)69%extreme

Compare Killarney's Climate with Cities Worldwide