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December Weather in Marion, Australia

Last updated: August 22, 2025

In December, the average temperature in Marion, Australia is a comfortable 19°C (67°F). Expect lows of 10°C (51°F) and highs reaching up to 36°C (97°F). With an average precipitation of 17 mm (0.7 in) spread over 4 days, you can anticipate a pleasant mix of sunshine and light showers. The average humidity sits at a manageable 46%, making it an ideal time to explore the outdoors!

December Temperature in Marion

In December, in Marion, the average temperature is 19°C (67°F). The maximum can reach 36°C (97°F), while the minimum can be as low as 10°C (51°F). Be sure to pack for a range of temperatures when traveling during this time.

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

The chart illustrates December temperature patterns in Marion, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marion, December typically has an average temperature of 19°C (67°F), with highs reaching up to 36°C (97°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec706867635753525255596366
Data source: Temperature data for Marion 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 Marion

In Marion in December, the precipitation amount is 17 mm (0.7 in) over a span of 4 days.

December Precipitation Trends in Marion

The chart displays monthly precipitation patterns in Marion, 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 Marion, December typically receives around 17 mm (0.7 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec162015326154687544383817
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Marion

In Marion in December humidity is 46%. With an average temperature of 19°C (67°F), this humidity feels like a comfortable embrace, making it pleasant for traveling and exploring, though a light jacket might be advisable for the evening chill.

December Average Humidity in Marion

This chart illustrates the average monthly humidity levels in Marion, 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 Marion is approximately 46%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec41%46%55%66%73%76%76%70%65%51%50%46%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Marion

In Marion 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 Marion.

Maximum UV Index Levels in Marion for December

The chart shows the monthly maximum UV Index (UVI) for Marion 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 Marion typically reaches 15, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec141312853457101215
Data source: Marion 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 Marion Compares to Other Months

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

This table compares monthly weather conditions in Marion, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather21°C (70°F)16 mm (0.6 inches)41%extreme
February Weather20°C (69°F)20 mm (0.8 inches)46%extreme
March Weather19°C (67°F)15 mm (0.6 inches)55%extreme
April Weather17°C (64°F)32 mm (1.3 inches)66%very high
May Weather14°C (58°F)61 mm (2.4 inches)73%moderate
June Weather12°C (53°F)54 mm (2.1 inches)76%moderate
July Weather11°C (53°F)68 mm (2.7 inches)76%moderate
August Weather11°C (52°F)75 mm (2.9 inches)70%moderate
September Weather13°C (55°F)44 mm (1.7 inches)65%high
October Weather15°C (59°F)38 mm (1.5 inches)51%very high
November Weather17°C (63°F)38 mm (1.5 inches)50%extreme
December Weather19°C (67°F)17 mm (0.7 inches)46%extreme

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