December Weather in Geelong, Australia

Last updated: February 25, 2025

December in Geelong, Australia showcases a vibrant mix of soaring temperatures and refreshing coastal breezes. With a maximum average of 40°C (104°F), days can feel like a sun-drenched adventure, while the average temperature sits comfortably at 17°C (63°F), offering mild evenings. The minimum temperature drops to a chilly 9°C (48°F), reminding residents to keep a light jacket handy for night strolls. Rain is relatively infrequent, with just 45 mm (1.8 in) of precipitation spread over 6 days, and the humidity level hovers at 69%, creating a warm yet enjoyable atmosphere. Overall, December is a month of contrast, perfect for embracing the Australian summer.

December Temperature in Geelong

In December, Geelong, Australia, ushers in the summer with rising temperatures that are a stark contrast to the cooler months. With minimums around 9°C (48°F) and maximums soaring up to 40°C (104°F), the region experiences a significant increase in warmth, inviting outdoor activities and beach days. The average temperature of 17°C (63°F) marks a gradual shift from the milder autumn months of November, hinting at the peak summer heat that follows in January and February. This noteworthy trend towards hotter days not only enhances the vibrant atmosphere of Geelong but also sets the stage for a bustling season filled with festivals and seaside adventures. As the year winds down, the liveliness of December's climate captivates both locals and visitors alike, making it a perfect time to embrace the sun-kissed beauty of this coastal gem.

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

The chart illustrates December temperature patterns in Geelong, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends.
JanFebMarAprMayJunJulAugSepOctNovDec676564605551505053566063
Data source: Temperature data for Geelong 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 Geelong

In December, Geelong experiences moderate precipitation, averaging 45 mm (1.8 in) over approximately 6 days of rain. This month's rainfall is slightly lower compared to the preceding months of November and October, which recorded 67 mm (2.6 in) and 64 mm (2.5 in) respectively. Interestingly, December's rainfall aligns closely with the wetter winter months, highlighting a consistent trend of increased precipitation from late spring to early summer. As the year closes, Geelong's climate transitions seamlessly from the earlier wetter conditions, providing a balanced environment that supports the region's diverse flora and outdoor activities.

December Precipitation Trends in Geelong

The chart displays monthly precipitation patterns in Geelong, 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.
JanFebMarAprMayJunJulAugSepOctNovDec353736405340354545646745
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Geelong

In Geelong, Australia, December marks a transitional point in the annual humidity trend. With an average humidity of 69%, the month showcases a slight dip from the peak levels seen in the late spring and early summer. Following a gradual rise throughout the year, peaking at 80% in the winter months of May through July, the humidity begins to decline, signaling the end of the wetter season. Compared to the preceding months, December's humidity is still relatively high, yet it reflects a broader pattern of decreasing moisture as the region prepares for the drier heat of summer. This shift not only influences daily weather but also sets the stage for a warm, inviting ambiance as the holiday season approaches.

December Average Humidity in Geelong

This chart illustrates the average monthly humidity levels in Geelong, 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.
JanFebMarAprMayJunJulAugSepOctNovDec65%67%71%75%80%80%81%79%76%72%72%69%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Geelong

In December, Geelong experiences a soaring UV Index of 13, categorizing it as extreme, with a burn time of just 10 minutes. This trend of heightened UV levels is consistent with the preceding months of November and January, both also marked by an extreme rating, indicating that sun protection is crucial during this peak summer period. As the year transitions, Geelong's UV Index fluctuates, dropping to high in April and moderate levels from May to August, before climbing back to extreme levels in late spring and early summer. Understanding these trends is essential for residents and visitors alike to ensure proper sun safety. For detailed insights, visit Geelong UV Index.

Maximum UV Index Levels in Geelong for December

The chart shows the monthly maximum UV Index (UVI) for Geelong 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.
JanFebMarAprMayJunJulAugSepOctNovDec13121174334791113
Data source: Geelong 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 Geelong

December in Geelong, Australia, shines brightly with an impressive 346 hours of sunshine, marking the peak of the sun-filled months. As the year draws to a close, the trend of increasing daylight hours is evident, especially compared to the winter months of June and July, which see significantly lower counts at 197 and 214 hours, respectively. Notably, December outshines even November, when the sun graced the city for 312 hours, emphasizing the return of warmth and vibrancy as summer approaches. This radiant finale to the year not only lifts spirits but also sets the stage for outdoor adventures, reflecting a delightful reprieve from the cooler seasons.

Monthly Sunshine Duration in Geelong: December Highlighted

The December sunshine duration represents the total number of hours Geelong 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.
JanFebMarAprMayJunJulAugSepOctNovDec282h289h283h243h219h197h214h238h264h296h312h346h
Data source: Geelong December Sunshine duration data generated using information from the Copernicus Climate Change Service.

Chance of Sun in Geelong During December

In December, Geelong, Australia, experiences a notable uplift in the likelihood of sunny weather, with a 49% chance of sunshine—the highest for the year. This significant increase in sunshine potential marks a clear transition as the year draws to a close. Following the relatively overcast months of November (30%) and June (30%), December’s sun-soaked days are a welcome change. The trend indicates that as summer approaches, the chances for clear, sunny skies rise, peaking compared to other months, such as January through November where the probabilities hover between 30% and 40%. For those looking to soak in some rays, December in Geelong offers a brighter and sunnier outlook that promises to delight residents and visitors alike.

Percentage of Sunny Days in December in Geelong

The chart illustrates the percentage of sunny days in Geelong 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 Geelong experiences clear skies throughout the year.
JanFebMarAprMayJunJulAugSepOctNovDec35%37%34%38%37%30%31%40%40%37%30%49%
Data source: Geelong December chance of sun data, generated using information from the Copernicus Climate Change Service.

Daylight Hours in Geelong in December

In Geelong, Australia, the rhythm of daylight dances through the seasons, reaching its peak during December, where it delights in 14 hours of sunshine. This ample light in early summer contrasts with the shorter days of winter, as witnessed in June and July, with only 9 hours of daylight. Following the festive cheer of December, daylight begins to gradually wane, tapering off to 11 hours by April. As we traverse the year, it's evident that Geelong's daylight duration creates a vibrant cycle—longer, brighter days in the warmer months fostering an outdoor lifestyle, while the quieter winter months invite a restful retreat into cozy interiors.

Average Daylight Hours in Geelong for December

The chart illustrates the variation in daylight duration in Geelong throughout the year, with December highlighted. It shows the monthly changes in daylight hours, calculated by summing the hours between sunrise and sunset.
JanFebMarAprMayJunJulAugSepOctNovDec14h 28m13h 30m12h 17m11h 3m10h 2m9h 31m9h 47m10h 40m11h 50m13h 4m14h 10m14h 45m
Data source: Geelong daylight hours, calculated by summing the hours between sunrise and sunset for each day.

December Winds in Geelong

In Geelong, Australia, December marks a gentle transition in wind patterns as the average wind speed settles at 4.1 m/s (9 mph). This figure reflects a consistent trend observed throughout the year, with wind speeds peaking notably in mid-winter months, notably July and September at 5.0 m/s (11 mph). As summer approaches, the winds tend to soften, dipping slightly from the brisker gusts of earlier months. Compared to the lively breezes in July, December's winds carry a more temperate allure, enticing locals and visitors alike to embrace the pleasant coastal climate. This steady yet mild airflow sets a serene atmosphere, perfect for enjoying the sun-soaked days and balmy evenings characteristic of the Australian summer.

Average December Wind Speed in Geelong

The chart displays monthly wind speed patterns in Geelong, 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.
JanFebMarAprMayJunJulAugSepOctNovDec4.53.93.83.94.13.95.04.75.04.34.34.1 m/s
Data source: Geelong December wind data, generated using information from the Copernicus Climate Change Service.

How December Weather in Geelong Compares to Other Months

The weather in Geelong 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 Geelong and find detailed weather information for every month.

In comparing the weather between December and January, December tends to be slightly warmer with maximum temperatures peaking at 40°C (104°F), while January's maximum is a bit lower at 38°C (101°F). January also experiences a marginal increase in minimum temperatures, starting at 11°C (52°F), compared to December's 9°C (48°F). Precipitation is slightly reduced in January, with 35 mm (1.4 in) expected over 5 days, compared to December's 45 mm (1.8 in) over 6 days. Additionally, humidity levels are slightly lower in January at 65%, down from December's 69%. For more details, check out Geelong weather in January.

In December, the weather typically reaches a minimum temperature of 9°C (48°F), an average of 17°C (63°F), and peaks at a scorching 40°C (104°F). The month experiences around 45 mm (1.8 in) of precipitation over about six days, with humidity averaging 69%. In contrast, February sees slightly milder conditions, with minimum temperatures averaging 10°C (50°F), an average high of 18°C (65°F), and maximum temperatures reaching 37°C (99°F). Precipitation decreases to 37 mm (1.4 in) over five days, and humidity levels drop slightly to 67%. For more detailed information, check out Geelong weather in February.

In comparing the weather between December and March, we notice some notable differences. December experiences warmer maximum temperatures, reaching up to 40°C (104°F), while March sees a cooler maximum of 35°C (95°F). Both months have similar minimum temperatures, around 9°C (48°F), with March slightly edging out in average temperature at 18°C (65°F) compared to December's 17°C (63°F). Precipitation is similar in both months, with December averaging 45 mm (1.8 in) over six days and March slightly lower at 36 mm (1.4 in) over five days. Humidity levels are also comparable, with December at 69% and March at 71%. For more details, you can check out Geelong weather in March.

In December, the weather tends to be hotter, with temperatures ranging from a minimum of 9°C (48°F) to a scorching maximum of 40°C (104°F) and an average of 17°C (63°F). The month experiences approximately 45 mm (1.8 in) of rainfall over 6 days, along with a humidity level of 69%.

In contrast, April sees cooler temperatures, with a minimum of 7°C (44°F) and a maximum of 30°C (87°F), averaging around 15°C (60°F). Rainfall is slightly less, totaling 40 mm (1.6 in) over 5 days, and humidity rises to 75%. For more detailed insights into April weather, you can check Geelong weather in April.

In December, the weather tends to be much warmer, with temperatures ranging from a minimum of 9°C (48°F) to a maximum of 40°C (104°F) and an average of 17°C (63°F). Despite having lower precipitation at 45 mm (1.8 in) over just 6 days, the humidity level sits at a comfortable 69%. In contrast, May brings cooler temperatures, with a minimum of 5°C (41°F), an average of 13°C (55°F), and a maximum of 23°C (75°F). The month is slightly wetter, with 53 mm (2.1 in) of precipitation over 10 days and higher humidity at 80%. This shift in temperature and humidity illustrates the transitional nature of the seasons in Geelong. For more detailed insights, you can check out Geelong weather in May.

In December, the weather is generally hotter and more variable, with temperatures ranging from a minimum of 9°C (48°F) to a scorching maximum of 40°C (104°F), while average temperatures hover around 17°C (63°F). The month experiences about 45 mm (1.8 in) of precipitation over roughly 6 days, with humidity levels at 69%. In contrast, June sees much cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 18°C (65°F), and an average temperature of just 11°C (51°F). With slightly less precipitation at 40 mm (1.6 in) over 7 days, the humidity is a bit higher at 80%. For a more detailed look at the conditions, check out Geelong weather in June.

In December, the weather is significantly warmer, with temperatures ranging from a low of 9°C (48°F) to a scorching high of 40°C (104°F), averaging around 17°C (63°F). In contrast, July experiences cooler temperatures, with a minimum of 3°C (38°F) and a maximum of 17°C (63°F), averaging only 10°C (50°F). Precipitation is slightly higher in July at 35 mm (1.4 in) over 10 days, compared to December's 45 mm (1.8 in) over just 6 days. Additionally, July has a higher humidity level at 80%, making it feel cooler than its December counterpart, which has 69% humidity. For more information, you can visit Geelong weather in July.

December and August present contrasting weather patterns. In December, temperatures can reach a scorching high of 40°C (104°F), with an average temperature of 17°C (63°F), making it considerably warmer than August, where the maximum temperature only reaches 19°C (67°F) and the average hovers around 10°C (51°F). While both months receive the same amount of precipitation at 45 mm (1.8 in), December experiences rain on only 6 days compared to 11 days in August, indicating a clearer sky during the former. Additionally, December's humidity is slightly lower at 69%, whereas August reaches a higher humidity level of 79%, contributing to a more damp feel during the latter month. For more specific details, you can explore Geelong weather in August.

The weather in December contrasts significantly with that of September. In December, temperatures can range from a chilly 9°C (48°F) at night to a scorching 40°C (104°F) during the day, with an average temperature of 17°C (63°F). In contrast, September experiences milder conditions, with temperatures ranging from a minimum of 4°C (40°F) to a maximum of 24°C (76°F) and an average of 12°C (54°F). Both months receive the same amount of precipitation—45 mm (1.8 in)—but December sees fewer rainy days (6) compared to September's 10 days. Additionally, December's humidity is slightly lower at 69%, compared to September's 76%. For a detailed look at September's weather, visit Geelong weather in September.

In comparing the weather of December and October, December exhibits noticeably warmer temperatures with an average of 17°C (63°F), compared to October's cooler average of 14°C (57°F). The maximum temperature in December can reach up to 40°C (104°F), while October peaks at a milder 30°C (87°F). Precipitation levels are higher in October, with 64 mm (2.5 in) falling over 11 days, compared to 45 mm (1.8 in) over just 6 days in December. Humidity remains relatively similar, with October at 72% and December slightly lower at 69%. For more information on weather specifics during this month, you can check Geelong weather in October.

In comparing the weather between November and December, December tends to be warmer, with minimum temperatures starting at 9°C (48°F) and reaching highs of 40°C (104°F), while November records a lower minimum of 6°C (44°F) and a maximum of 35°C (95°F). The average temperatures in both months are quite similar, with December averaging 17°C (63°F) and November slightly cooler at 16°C (60°F). However, December experiences less precipitation overall, with 45 mm (1.8 in) spread across six days, compared to November’s 67 mm (2.6 in) over nine days. Humidity levels are also slightly lower in December at 69%, compared to November's 72%. For more detailed weather insights, you can check Geelong weather in November.

Compare Geelong's Climate with Cities Worldwide

Conclusion: What to Expect From December Weather in Geelong

As December rolls in, Geelong experiences a vibrant shift in weather, characterized by warm temperatures that set the stage for the summer season. The days can peak with scorching highs, contrasting with the cooler evenings that offer a refreshing respite. While the total precipitation remains modest, with occasional rain, humidity levels add a sultry feel to the air, making it a unique month compared to the rest of the year. This blend of warmth and moisture not only enhances the charm of the city but also invites residents and visitors alike to bask in the beauty of the coastal landscapes. For more insights into the annual weather patterns, check out Geelong Climate.