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December Weather in Killarney, Australia

Last updated: August 22, 2025

In December, the average temperature in Killarney, Australia is a pleasant 22°C (72°F), making it an ideal time to explore the area. However, be prepared for temperature fluctuations, as the thermometer can dip to a minimum of 9°C (49°F) or soar up to a scorching 38°C (101°F). Rainfall is common, with an average precipitation of 98 mm (3.8 in) over 11 days, while humidity levels hover around 69%, adding to the tropical feel of the season.

December Temperature in Killarney

In December in Killarney, the average temperature is 22°C (72°F). Maximum temperatures can reach 38°C (101°F), while minimum temperatures can drop to as low as 9°C (49°F). This creates a diverse climate, making it an ideal time for travelers to enjoy a range of outdoor activities, from warm sunny days to cooler evenings.

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

The chart illustrates December 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, December typically has an average temperature of 22°C (72°F), with highs reaching up to 38°C (101°F) and lows dropping to around 9°C (49°F).
JanFebMarAprMayJunJulAugSepOctNovDec737269635752515359646872
Data source: Temperature data for Killarney 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.

December Precipitation in Killarney

In Killarney in December, the precipitation amount is 98 mm (3.8 in) over the course of 11 days.

December Precipitation Trends in Killarney

The chart displays monthly precipitation patterns in Killarney, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Killarney, December typically receives around 98 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec59791142020282917121086198
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Killarney

In Killarney in December, humidity is 69%. With an average temperature of 22°C (72°F), this humidity feels like a warm, enveloping blanket, making travel feel sticky and slightly oppressive, yet also invigorating as the air is thick with the scent of blooming flora and vibrant surroundings.

December Average Humidity in Killarney

This chart illustrates the average monthly humidity levels in Killarney, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, 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 December generated using information from the Copernicus Climate Change Service.

December UV Index in Killarney

In Killarney in December, the maximum UV index reaches an alarming 15, which falls into the extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take precautions. For detailed information, you can check the Hourly UV Index in Killarney.

Maximum UV Index Levels in Killarney for December

The chart shows the monthly maximum UV Index (UVI) for Killarney in December, 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 December, the maximum UV index in Killarney typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec1615141075589121415
Data source: Killarney December 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 December 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 December’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 December’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

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