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December Weather in Melbourne, United States

Last updated: June 24, 2025

In December, the average temperature in Melbourne, United States hovers around -1°C (30°F). Expect a minimum dip to -22°C (-8°F) and a maximum rise to 22°C (73°F). During this month, the area experiences an average precipitation of 36 mm (1.4 in) over about 5 days, with humidity levels reaching a notable 83%.

December Temperature in Melbourne

In December in Melbourne, the average temperature is -1°C (30°F). Maximum temperatures can reach 22°C (73°F), while minimums can drop as low as -22°C (-8°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates December temperature patterns in Melbourne, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Melbourne, December typically has an average temperature of -1°C (30°F), with highs reaching up to 22°C (73°F) and lows dropping to around -22°C (-8°F).
JanFebMarAprMayJunJulAugSepOctNovDec212238486273767367523730
Data source: Temperature data for Melbourne 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 Melbourne

In Melbourne in December, the precipitation amount is 36 mm (1.4 in) over the course of 5 days.

December Precipitation Trends in Melbourne

The chart displays monthly precipitation patterns in Melbourne, 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 Melbourne, December typically receives around 36 mm (1.4 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec4045758315412182611131374536
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Melbourne

In Melbourne in December humidity is 83%. With an average temperature of -1°C (30°F), this humidity feels like a biting chill that seeps through your layers, making outdoor activities uncomfortable and encouraging travelers to seek shelter indoors.

December Average Humidity in Melbourne

This chart illustrates the average monthly humidity levels in Melbourne, 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 Melbourne is approximately 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Melbourne

In Melbourne in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Melbourne, you can check the information here.

Maximum UV Index Levels in Melbourne for December

The chart shows the monthly maximum UV Index (UVI) for Melbourne 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 Melbourne typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098643
Data source: Melbourne 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 Melbourne Compares to Other Months

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

This table compares monthly weather conditions in Melbourne, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)40 mm (1.6 inches)78%moderate
February Weather-6°C (22°F)45 mm (1.8 inches)80%moderate
March Weather3°C (38°F)75 mm (2.9 inches)77%high
April Weather9°C (48°F)83 mm (3.3 inches)77%very high
May Weather16°C (62°F)154 mm (6.1 inches)77%very high
June Weather23°C (73°F)121 mm (4.8 inches)81%extreme
July Weather24°C (76°F)82 mm (3.2 inches)81%very high
August Weather23°C (73°F)61 mm (2.4 inches)77%very high
September Weather20°C (68°F)113 mm (4.5 inches)73%very high
October Weather11°C (52°F)137 mm (5.4 inches)75%high
November Weather3°C (38°F)45 mm (1.8 inches)85%moderate
December Weather-1°C (30°F)36 mm (1.4 inches)83%moderate

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