December Weather in Melbourne, Australia

Last updated: February 25, 2025

In Melbourne, Australia, December marks the onset of summer, featuring a striking maximum temperature that can soar up to 43°C (109°F). The average temperature settles at a comfortable 18°C (65°F), while evenings can be refreshingly cool, dipping to a minimum of 8°C (46°F). Despite the warmth, the city experiences 74 mm (2.9 in) of total rainfall over approximately 7 days, bringing a hint of humidity at 50%. This blend of warm days and cool nights creates an inviting atmosphere perfect for enjoying Melbourne's vibrant outdoor lifestyle.

December Temperature in Melbourne

In December, Melbourne experiences a vibrant transition into summer, with temperatures showcasing the city's distinctive climate variability. The minimum temperature hovers at a pleasant 8°C (46°F), while the average climbs to a comfortable 18°C (65°F). However, the maximum temperature can soar to a sweltering 43°C (109°F), reflecting the potential for heatwaves as the year draws to a close. This dramatic fluctuation is a hallmark of Melbourne's weather, where warm days can follow cooler nights, inviting inhabitants and visitors alike to enjoy the city's festive atmosphere while remaining prepared for the heat. Whether indulging in outdoor activities or seeking refuge in air-conditioned spaces, December offers a lively yet unpredictable climate that embodies the essence of Melbourne.

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.
JanFebMarAprMayJunJulAugSepOctNovDec696766605450495054586265
Data source: Temperature data for Melbourne 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.

December Precipitation in Melbourne

In December, Melbourne experiences a notable peak in precipitation, registering 74 mm (2.9 in) over 7 days. This aligns with the overall trend of increased rainfall as the year transitions from the dry summer months. Following November's 58 mm (2.3 in) and a pattern of fluctuating precipitation throughout the months, December's rainfall mirrors that of October, indicating a consistent wet spell just before the turn of the new year. Despite the increase in volume, the relatively modest number of rainy days suggests that when it does rain, it tends to be more substantial, contributing to the lush landscapes that characterize the city during this festive season. Thus, December showcases Melbourne’s climatic transition, where summer warmth meets the refreshing embrace of rain.

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.
JanFebMarAprMayJunJulAugSepOctNovDec424440515754465864745874
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Melbourne

In December, Melbourne experiences a noticeable shift in humidity, with levels dropping to 50%—a refreshing contrast to the increasing moisture of the preceding months. This decline marks the start of summer, following a gradual rise from the 43% humidity in January through the wetter months, peaking at 83% in July. As the year draws to a close, the city bids farewell to the high-humidity winter, transitioning to a drier atmosphere. With December's relatively moderate humidity, Melburnians can enjoy the warm summer days with a touch more comfort, setting a pleasant tone for holiday festivities.

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, allowing you to see how December's humidity levels compare to other months.
JanFebMarAprMayJunJulAugSepOctNovDec43%49%60%71%79%82%83%79%72%61%59%50%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Melbourne

As December rolls into Melbourne, the UV Index spikes to a striking 14, marking it as an extreme exposure category with a burn time of just 10 minutes. This trend of high UV levels continues from November, showcasing a consistent pattern where summer months elevate the risk of sunburn. Notably, the UV Index has been consistently extreme in the first three months of summer, with January and February also reaching 14 and 12 respectively. As the season shifts, it is essential to remain vigilant about sun safety and protection. For more detailed information on UV levels throughout the year, check out the Melbourne UV Index.

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.
JanFebMarAprMayJunJulAugSepOctNovDec14121174335791214
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.

December Sunshine in Melbourne

In December, Melbourne basks in an impressive 337 hours of sunshine, marking the peak of the city's radiant summer. This surge in daylight contrasts sharply with the cooler months, where sunshine dwindles significantly, particularly in June with only 192 hours. As the year progresses, sunlight tends to increase, peaking in December, which not only offers the city's residents beautiful weather but also extends the charm of outdoor activities and festive celebrations. The gradual rise in daylight from a low of 214 hours in May to December's brilliant glow highlights Melbourne's transition into summer, inviting locals and tourists alike to relish the warmth and vibrant atmosphere. Overall, December stands out as a month where the sun truly shines bright, symbolizing the joy and vitality of Melbourne during the festive season.

Monthly Sunshine Duration in Melbourne: December Highlighted

The December sunshine duration represents the total number of hours Melbourne experiences direct sunlight during the month of December, excluding cloudy or obstructed periods. This chart compares the sunshine duration of December with the other months of the year.
JanFebMarAprMayJunJulAugSepOctNovDec279h290h285h240h214h192h210h230h259h282h291h337h
Data source: Melbourne December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Melbourne During December

December in Melbourne heralds a notable upswing in sunny weather, boasting a 49% chance of clear skies. This increase positions it as one of the brightest months of the year, contrasting with the more temperate conditions observed in the preceding months. Notably, December's likelihood of sunshine exceeds that of November and is significantly higher than the colder winter months, which hover around 31%. As summer approaches, Melburnians can look forward to more sun-drenched days, making it an ideal time for outdoor activities and festive celebrations. With each month transitioning from the cool and cloudy tones of winter to the warm and vibrant hues of summer, December stands out as a beacon of brightness on the weather calendar.

Percentage of Sunny Days in December in Melbourne

The chart illustrates the percentage of sunny days in Melbourne throughout the year, with December highlighted. It highlights the variation in sunshine across each month and provides an overview of the typical frequency of sunny days, offering insights into how often Melbourne experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec35%43%31%40%42%31%31%40%40%36%33%49%
Data source: Melbourne December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Melbourne in December

In Melbourne, Australia, the month of December shines with approximately 14 hours of daylight, mirroring the lengths observed in January and November. This peak in daylight signals the height of the Southern Hemisphere's summer, creating an atmosphere ripe for outdoor activities and vibrant festivals. As the year progresses from December down to June, daylight gradually diminishes, dipping to just 9 hours during the winter months of June and July. However, the trend shifts again as spring arrives, with daylight steadily increasing towards the longer days of late spring and summer. This cyclical pattern of increased and decreased daylight not only influences the local lifestyle but also showcases the dynamic nature of seasonal changes in Melbourne.

Average Daylight Hours in Melbourne for December

The chart illustrates the variation in daylight duration in Melbourne throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h 26m13h 29m12h 17m11h 4m10h 4m9h 34m9h 49m10h 41m11h 50m13h 3m14h 9m14h 43m
Data source: Melbourne daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Melbourne

As December rolls into Melbourne, the city experiences a steady average wind speed of 4.0 m/s, or about 9 mph, reminiscent of the breezy conditions seen in the preceding months of October and November. This marks a slight increase from the calmer winds of earlier months, particularly March, which recorded just 3.2 m/s. The trend seems to hint at the onset of summer, with wind speeds gradually rising from 3.2 m/s in March to the more robust figures seen in December and previous winter months. While December's winds are comparable to those just before it, they set the stage for the warmer days ahead, inviting Melburnians to enjoy the pleasant breezes that come with the holiday season.

Average December Wind Speed in Melbourne

The chart displays monthly wind speed patterns in Melbourne, with values for each month shown alongside December's data, which is highlighted for easy comparison. It illustrates the average wind speed, offering insights into how December's wind conditions compare to the rest of the year.
JanFebMarAprMayJunJulAugSepOctNovDec3.93.73.23.43.74.04.84.34.44.04.04.0 m/s
Data source: Melbourne December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Melbourne Compares to Other Months

The weather in Melbourne changes throughout the year, offering a unique experience in each season. Below is a month-by-month comparison of December's weather with other months, highlighting differences in temperature, precipitation, and other key factors. Click on each section to discover seasonal trends in Melbourne and find detailed weather information for every month.

December weather features a broader temperature range, with minimums around 8°C and maximums reaching up to 43°C. The month experiences higher precipitation levels, averaging 74 mm over 7 days with a humidity of 50%. In contrast, January sees a slightly warmer average temperature of 21°C, minimal change in maximum temperatures (up to 43°C), and a decrease in precipitation to 42 mm over just 5 days, resulting in lower humidity at 43%. For more detailed insights, you can check Melbourne weather in January.

December and February offer relatively similar weather patterns, with both months experiencing warm temperatures. In December, the temperatures range from a minimum of 8°C (46°F) to a maximum of 43°C (109°F), with an average of 18°C (65°F). This month also sees about 74 mm (2.9 in) of precipitation spread over approximately 7 days, resulting in a humidity level of 50%. In contrast, February has a slightly higher average temperature of 19°C (67°F) but a similar range, with a minimum of 8°C (46°F) and a maximum of 42°C (109°F). Precipitation in February drops to 44 mm (1.7 in) over just 4 days, leading to a slightly lower humidity of 49%. For a more detailed look at the weather in February, you can check Melbourne weather in February.

In comparing the weather of December and March, both months experience relatively mild temperatures, with December showing a wider range; it can reach a maximum of 43°C (109°F) while averaging 18°C (65°F). In March, temperatures are slightly cooler, peaking at 38°C (101°F) and averaging an equivalent minimum of 8°C (47°F). Precipitation is more prevalent in December, with 74 mm (2.9 in) across 7 days, compared to March's 40 mm (1.6 in) over 6 days. Additionally, March tends to be more humid, at 60%, in contrast to December's 50%. For more detailed insights, you can check the Melbourne weather in March.

In December, the weather showcases a wider temperature range, with minimums around 8°C (46°F) and maximums soaring to 43°C (109°F), making it one of the hottest months of the year. Average temperatures hover around a comfortable 18°C (65°F) and the month experiences 74 mm (2.9 in) of rainfall over 7 days, accompanied by a relatively moderate humidity of 50%. In contrast, April brings cooler days, where temperatures dip slightly, with a minimum of 5°C (41°F) and a maximum of 32°C (89°F), creating a milder overall climate. Average temperatures are around 15°C (60°F) and precipitation decreases to 51 mm (2.0 in) over the same number of rainy days, but the humidity rises significantly to 71%. For more details on April conditions, you can visit Melbourne weather in April.

December and May present notably different weather patterns. In December, temperatures range from a minimum of 8°C (46°F) to a scorching maximum of 43°C (109°F), with an average of 18°C (65°F). The month typically experiences 74 mm (2.9 in) of precipitation over about 7 days, with a moderate humidity level of 50%. In contrast, May sees cooler temperatures, with minimums dropping to 3°C (38°F) and maximums reaching 25°C (77°F), averaging at 12°C (54°F). This month also receives about 57 mm (2.2 in) of rainfall across approximately 10 days, coupled with a higher humidity of 79%. For more detailed insights, check out Melbourne weather in May.

December and June in Melbourne present a striking contrast in weather patterns. In December, temperatures soar, with a minimum of 8°C (46°F) and a blistering maximum reaching up to 43°C (109°F), resulting in an average temperature of 18°C (65°F). This month experiences a moderate amount of precipitation, totaling 74 mm (2.9 in) over about 7 days and a humidity level of 50%. In contrast, June brings much cooler temperatures, where the minimum drops to 1°C (34°F), reaching an average of only 10°C (50°F) and a maximum of 18°C (65°F). Although it has slightly less precipitation at 54 mm (2.1 in) over 9 days, the humidity is significantly higher at 81%. For more detailed information, you can check Melbourne weather in June.

December and July present strikingly different weather patterns. In December, temperatures range from a minimum of 8°C (46°F) to a scorching maximum of 43°C (109°F), with an average of 18°C (65°F). The month experiences around 74 mm (2.9 in) of precipitation over approximately 7 days, and humidity levels are relatively moderate at 50%. In contrast, July brings cooler weather, with temperatures varying from a low of -1°C (31°F) to a high of 18°C (64°F), averaging just 10°C (49°F). The precipitation decreases to 46 mm (1.8 in), yet it occurs over 12 days, resulting in a much higher humidity level of 83%. For more information on July weather specifics, check out Melbourne weather in July.

When comparing December and August weather, December is characterized by significantly higher temperatures, with a minimum of 8°C (46°F) and an average of 18°C (65°F), peaking at a scorching 43°C (109°F). In contrast, August experiences cooler conditions, featuring a minimum of 1°C (34°F) and an average of just 10°C (50°F), with a maximum temperature of 21°C (70°F). Precipitation in December totals 74 mm (2.9 in) over approximately 7 days, while August sees slightly less rainfall at 58 mm (2.3 in) across more rainy days, totaling 13. Humidity levels also differ, with December at 50% compared to August's much higher level of 79%. For more detailed insights into August weather, visit Melbourne weather in August.

The weather in December is markedly warmer than in September, with temperatures ranging from a minimum of 8°C (46°F) to a peak of 43°C (109°F), while September sees much cooler temperatures that fluctuate from 1°C (33°F) to a maximum of 27°C (81°F). Additionally, December experiences lower humidity at 50%, compared to September's higher humidity level of 72%. Precipitation also differs slightly; December sees about 74 mm (2.9 in) over 7 days, whereas September records 64 mm (2.5 in) across 12 days. For more details about September weather, you can check Melbourne weather in September.

December weather is characterized by significantly warmer temperatures compared to October, with minimums around 8°C (46°F) and maximums soaring up to 43°C (109°F), while October sees temperatures ranging from a cooler 3°C (38°F) to a maximum of 32°C (91°F). Despite both months experiencing the same total precipitation of 74 mm (2.9 in), December's rainfall is concentrated over fewer days (7 days) compared to October's 12 days of rain. Additionally, humidity levels are lower in December at 50%, compared to a higher 61% in October. For more detailed information on October weather, you can check Melbourne weather in October.

In comparing the weather of December and November, December experiences slightly warmer temperatures, with a minimum of 8°C (46°F) and an average of 18°C (65°F), compared to November's minimum of 5°C (42°F) and average of 17°C (62°F). However, December also presents more extreme highs, reaching up to 43°C (109°F), while November peaks at 39°C (102°F). Precipitation levels are higher in December, totaling 74 mm (2.9 in) over 7 days, compared to November's 58 mm (2.3 in) across 10 days. Additionally, December maintains a lower humidity level at 50%, whereas November's humidity stands at a higher 59%. For more details, you can check Melbourne weather in November.

Compare Melbourne's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Melbourne

In December, Melbourne transforms into a vibrant summer destination, with temperatures soaring to exhilarating highs that are a stark contrast to the cooler months. The average warmth invites a flurry of outdoor activities, while the occasional rainfall serves as a refreshing counterbalance to the heat. With humidity levels comfortably set at around 50%, the climate during this festive month is both inviting and dynamic. Whether basking in the sun or enjoying the lush greenery that thrives from the seasonal rains, December is a time that captures the essence of Melbourne's bustling summer spirit. For a comprehensive understanding of how this month fits into the broader climate patterns, check out Melbourne Climate.