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December Weather in Macarthur, Australia

Last updated: August 22, 2025

In Macarthur, Australia, the average temperature in December hovers around 16°C (62°F). Expect a range where the minimum dips to 3°C (37°F) and the maximum can soar to 43°C (109°F). With an average humidity of 76%, the climate can feel quite humid. Be prepared for some rain, as 43 mm (1.7 in) of precipitation typically falls over 7 days during this month.

December Temperature in Macarthur

In December in Macarthur, the average temperature is 16°C (62°F). Maximum temperatures can reach 43°C (109°F), while minimums can drop to as low as 3°C (37°F). Be prepared for a wide range of temperatures when traveling to Macarthur during this month.

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

The chart illustrates December temperature patterns in Macarthur, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Macarthur, December typically has an average temperature of 16°C (62°F), with highs reaching up to 43°C (109°F) and lows dropping to around 3°C (37°F).
JanFebMarAprMayJunJulAugSepOctNovDec666463585349484851555961
Data source: Temperature data for Macarthur 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 Macarthur

In Macarthur in December, the total precipitation amount is 43 mm (1.7 in) spread over a period of 7 days.

December Precipitation Trends in Macarthur

The chart displays monthly precipitation patterns in Macarthur, 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 Macarthur, December typically receives around 43 mm (1.7 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec302834487657768672766743
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Macarthur

In Macarthur in December, humidity is 76%. With an average temperature of 16°C (62°F), this humidity feels like a warm, enveloping blanket that makes exploring the outdoors feel both refreshing and slightly muggy, urging travelers to take breaks often and enjoy the shade.

December Average Humidity in Macarthur

This chart illustrates the average monthly humidity levels in Macarthur, 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 Macarthur is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%75%76%76%79%78%78%77%77%76%76%76%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Macarthur

In Macarthur in December, the maximum UV index is 14, which corresponds to an extreme Exposure Category. The time to burn is just 10 minutes, so it's crucial to take precautions. For the detailed hourly UV index in Macarthur, you can check here.

Maximum UV Index Levels in Macarthur for December

The chart shows the monthly maximum UV Index (UVI) for Macarthur 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 Macarthur typically reaches 14, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec14121174335791214
Data source: Macarthur 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 Macarthur Compares to Other Months

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

This table compares monthly weather conditions in Macarthur, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather19°C (66°F)30 mm (1.2 inches)76%extreme
February Weather18°C (64°F)28 mm (1.1 inches)75%extreme
March Weather17°C (63°F)34 mm (1.3 inches)76%extreme
April Weather14°C (58°F)48 mm (1.9 inches)76%high
May Weather11°C (53°F)76 mm (3.0 inches)79%moderate
June Weather9°C (49°F)57 mm (2.2 inches)78%moderate
July Weather9°C (48°F)76 mm (3.0 inches)78%moderate
August Weather9°C (49°F)85 mm (3.4 inches)77%moderate
September Weather11°C (52°F)72 mm (2.8 inches)76%high
October Weather13°C (55°F)76 mm (3.0 inches)76%very high
November Weather15°C (59°F)67 mm (2.6 inches)76%extreme
December Weather16°C (62°F)43 mm (1.7 inches)76%extreme

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