Last updated: February 25, 2025
December in Rottnest Island, Australia, offers a delightful summer experience, with maximum temperatures soaring to 31°C (88°F) and an average of around 21°C (70°F). The nights cool down pleasantly, reaching a minimum of 14°C (58°F), creating ideal conditions for outdoor activities. While the island enjoys a generally dry climate, December sees a modest 8 mm (0.3 in) of rainfall across just 2 days, allowing plenty of time for sun-soaked adventures. With a comfortable humidity level of 53%, visitors can relish the warm sun and explore this stunning destination in perfect weather.
As December rolls into Rottnest Island, the temperatures start to heat up, reflecting the onset of summer. Average temperatures hover around 21°C (70°F), with the mercury peaking at a balmy 31°C (88°F), making it one of the warmest months of the year. The minimum temperature is a comfortable 14°C (58°F), ensuring that both early risers and night owls can enjoy the island's beauty at any hour. This month, in particular, marks a transition from the notably cooler spring months, with increasingly warmer days that invite beachgoers and outdoor enthusiasts to revel in the sun. Overall, December’s warm and inviting climate sets the perfect backdrop for adventure and relaxation alike on this stunning island getaway.
In December, Rottnest Island experiences a notable decline in precipitation, with only 8 mm (0.3 in) of rain falling over just 2 days. This marks a stark contrast to the wetter months preceding it, particularly June and July, which see substantial rainfall, averaging over 143 mm each. As the island transitions into the summer season, December tends to enjoy a more arid climate, indicating a shift from the peak of the rainy season. This trend not only highlights the island's seasonal variations but also offers a glimpse into the enjoyable weather conditions that characterize the holiday season, ideal for outdoor activities and exploration. While the low precipitation may suggest a dry month, it sets the perfect backdrop for enjoying Rottnest Island's stunning landscapes under the sun.
As the year comes to a close, December in Rottnest Island, Australia, offers a transition in humidity, resting at 53%. This marks a dip compared to the previous months, notably from the peak humidity of 72% in May and 77% during the cooler winter months of June and July. The trending pattern reveals a gradual increase in humidity leading into winter, peaking in the mid-year, before tapering off as summer approaches again. January through February sees a comfortable range around the low 50s, but by March, the humidity steadily rises to a more sultry 59% and continues to climb until the winter months bring more moisture. This cyclical pattern suggests a climate that balances between dry and humid, allowing for both pleasant beach days and refreshing, cooler spells.
In December, Rottnest Island, Australia, continues to sizzle with a UV Index of 14, categorizing it as extreme and resulting in a burn time of just 10 minutes. This trend of high UV exposure extends from the previous summer months of January and February, both also registering a UV Index of 14. Notably, the UV levels begin to taper off with the arrival of autumn, reflecting a gradual decline in intensity through April and May. However, even as winter sets in, the UV Index doesn’t drop significantly until late in the year. Visitors to this sun-soaked paradise should remain vigilant against sun exposure during these peak months. For more detailed information about the UV Index throughout the year, check out the Rottnest Island UV Index.
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As December rolls in, Rottnest Island basks in a radiant glow, boasting an impressive 384 hours of sunshine, the highest of the year. This vibrant month seamlessly builds on the sun-soaked trend established in the preceding months, with sunshine hours progressively increasing since the start of spring. With each month reflecting a brighter intensity—from 279 hours in May to a dazzling 352 hours in November—December's abundant sunshine serves as a perfect culmination of the island's luminous journey. Visitors can expect long, sunlit days ideal for exploring pristine beaches and sparkling turquoise waters, making it an enchanting destination as the year draws to a close.
In December, Rottnest Island, Australia, basks in an impressive 80% likelihood of sunny weather, making it one of the sunniest months of the year. This peak comes after a gradual increase in sunshine probabilities from the cooler months, where the chance of bright days dips below 50% in May and July. Following the spring transition in November, which brings a 67% chance of sun, December emerges as a true highlight for sun-seekers, reflecting a notable upward trend that positions it right at the heart of Australia's summer festivities. As the year wraps up, nature offers an inviting canvas of blue skies, ideal for outdoor adventures and beach escapes.
In Rottnest Island, Australia, December ushers in a delightful increase in daylight duration, reaching an impressive 14 hours. This marks the peak of summer, following a gradual transition from the shorter days of autumn. As we reflect on the year, daylight hours start at a solid 13 hours in January and February but progressively diminish to 11 hours by March and April. The trend stabilizes around 10 hours from May through August, signaling the cooler months. However, as spring arrives in September, daylight begins to extend once again, culminating in the abundant daylight of November. December’s record light not only invites longer beach days and outdoor adventures but also highlights the island's seasonal rhythm, captivating both locals and visitors alike.
In December, Rottnest Island experiences a notable resurgence in wind speed, averaging 7.8 m/s (18 mph), a return to the brisk breeziness characteristic of the early summer months. This increase aligns with the higher winds observed in January and February, suggesting a consistent pattern as the season transitions. In contrast, the milder autumn months of April and May show a dip, with average speeds falling as low as 5.9 m/s (13 mph). Interestingly, July breaks this trend with a peak of 9.3 m/s (21 mph), marking the windiest month of the year. Overall, December’s winds reflect the island's dynamic climate, inviting visitors to embrace the refreshing seaside breezes as summer unfolds.
The weather in Rottnest Island 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 Rottnest Island and find detailed weather information for every month.
In December, the weather is generally warm with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 31°C (88°F), averaging around 21°C (70°F). The month experiences low precipitation, with only 8 mm (0.3 in) over 2 days, and humidity levels at 53%. In contrast, January sees a slight increase in the minimum temperature, reaching 15°C (59°F), and a marginal rise in the average temperature to 22°C (71°F), but a decrease in the maximum temperature to 29°C (85°F). January is significantly wetter, with 35 mm (1.4 in) of precipitation occurring on just one day, while humidity remains relatively stable at 52%. For a more detailed look at the weather in January, you can check Rottnest Island weather in January.
December weather tends to be slightly cooler than February, with a minimum temperature of 14°C (58°F) compared to February's 16°C (61°F). The average temperature in December is 21°C (70°F), while February sees a marginal increase to 22°C (72°F), with both months reaching a maximum of 31°C (88°F). However, February experiences significantly more precipitation, with 62 mm (2.5 in) over 4 days, contrasted with December's minimal 8 mm (0.3 in) over just 2 days. The humidity remains relatively similar, with December at 53% and February slightly higher at 55%. For more details on February weather specifically for Rottnest Island, check out Rottnest Island weather in February.
In December, the weather is characterized by a warmer overall climate, with average temperatures ranging from a minimum of 14°C (58°F) to a maximum of 31°C (88°F). The month experiences relatively low precipitation, with only 8 mm (0.3 in) falling over 2 days and humidity at 53%. In contrast, March sees slightly cooler temperatures, with a minimum of 15°C (60°F) and a maximum of 30°C (86°F). However, it has increased rainfall, totaling 19 mm (0.7 in) over 4 days, and higher humidity at 59%. For more details on the specific conditions for March, you can check Rottnest Island weather in March.
In December, the weather tends to be warmer, with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 31°C (88°F), while April experiences slightly cooler temperatures, with a range from 13°C (56°F) to 27°C (81°F). Precipitation is notably lower in December, averaging only 8 mm (0.3 in) over about 2 days, compared to April's 25 mm (1.0 in) spread over approximately 3 days. Additionally, April sees higher humidity levels at 70%, compared to December’s 53%. For more detailed information, you can check Rottnest Island weather in April.
December and May present contrasting weather conditions. In December, temperatures range from a minimum of 14°C (58°F) to a maximum of 31°C (88°F), with an average of 21°C (70°F). Rainfall is minimal at 8 mm (0.3 in) across just two days, and the humidity sits at a comfortable 53%. In contrast, May experiences cooler temperatures, with a minimum of 12°C (54°F) and a maximum of 24°C (76°F), averaging 18°C (66°F). The month is significantly wetter, receiving 80 mm (3.1 in) of precipitation over ten days, and humidity levels rise to 72%. For a more detailed look at May weather, visit Rottnest Island weather in May.
The weather in December contrasts significantly with that of June. During December, temperatures range from a mild 14°C (58°F) at night to a warm 31°C (88°F) during the day, accompanied by low precipitation of just 8 mm (0.3 in) over only 2 days. This results in a relatively comfortable humidity level of 53%. In contrast, June experiences cooler temperatures, with a minimum of 11°C (53°F) and a maximum of only 22°C (72°F). However, it is much wetter, with a considerable 158 mm (6.2 in) of rainfall spread over 13 days, leading to higher humidity levels of 77%. For more specific information about June weather on Rottnest Island, you can visit Rottnest Island weather in June.
December weather is generally warmer and drier compared to July. With temperatures ranging from a minimum of 14°C (58°F) to a maximum of 31°C (88°F), December enjoys an average of 21°C (70°F) and only experiences a slight 8 mm (0.3 in) of precipitation over just 2 days. In contrast, July is much cooler, with temperatures ranging from 12°C (54°F) to 21°C (70°F) and an average of 17°C (62°F). It also sees significantly higher rainfall, accumulating 143 mm (5.6 in) over 19 days, and experiences a higher humidity level at 77%. For a deeper look at July weather, visit Rottnest Island weather in July.
The weather in December is significantly warmer compared to August, with temperatures ranging from a minimum of 14°C (58°F) to a maximum of 31°C (88°F), while August sees much cooler temperatures with a minimum of 11°C (52°F) and a maximum of 21°C (70°F). In terms of precipitation, December experiences very little rain, with only 8 mm (0.3 in) over just 2 days, in stark contrast to August, which receives a substantial 138 mm (5.4 in) over 15 days, leading to a much higher humidity level of 75%. For more detailed insights on August weather, you can refer to Rottnest Island weather in August.
When comparing the weather in December and September, it's clear there are notable differences. In December, temperatures are warmer, with a minimum of 14°C (58°F), averaging 21°C (70°F), and reaching a maximum of 31°C (88°F). This month features relatively low precipitation, totaling only 8 mm (0.3 in) over just 2 days, and the humidity stands at 53%. In contrast, September brings cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 24°C (75°F). There is significantly more rainfall during this month, with 49 mm (1.9 in) spread over 10 days, resulting in higher humidity levels of 71%. For more specific insights, you can check Rottnest Island weather in September.
When comparing the weather in December and October, December typically enjoys warmer temperatures, with lows of 14°C and highs reaching up to 31°C, while October has a cooler range, featuring a minimum of 11°C and a maximum of 26°C. In terms of precipitation, December is much drier, seeing only 8 mm across 2 days, compared to October's 49 mm over 7 days, which makes October noticeably wetter. Additionally, humidity levels are higher in October at 63%, compared to December's 53%. For more details, you can check Rottnest Island weather in October.
In December, the weather is noticeably warmer than in November, with average temperatures rising from 19°C (66°F) in November to 21°C (70°F) in December. Additionally, the maximum temperature increases to 31°C (88°F) in December, compared to November's maximum of 27°C (82°F). Precipitation also decreases significantly, dropping from 27 mm (1.1 in) over 3 days in November to just 8 mm (0.3 in) over 2 days in December, indicating drier conditions. Humidity remains relatively stable, with December at 53% and November slightly higher at 56%. For more details on November's weather conditions, you can check Rottnest Island weather in November.
As December unfolds on Rottnest Island, the weather shifts to embrace the heart of summer, showcasing warm and inviting conditions. With daytime temperatures reaching delightful highs, this month stands out as the perfect time for outdoor activities, particularly against the backdrop of low precipitation and moderate humidity. Unlike the cooler months, December typically offers abundant sunshine and only a couple of rainy days, making it an ideal escape for beachgoers and nature enthusiasts alike. For a deeper understanding of the yearly trends and how December fits into the island's climate pattern, explore the Rottnest Island Climate page.