Last updated: August 28, 2025
In December, Ha Long, Vietnam, experiences a delightful blend of mild temperatures and occasional precipitation, making it a unique time to visit this stunning coastal destination. With a maximum of 28°C (82°F) and an average of 18°C (66°F), daytime conditions are generally comfortable, while nights can be cooler, dipping to a minimum of 8°C (46°F). Visitors can expect some light rain, with precipitation totaling around 31 mm (1.2 in) over approximately 6 days, and humidity levels hovering around 71%. This season offers a picturesque backdrop of the famous limestone karsts, inviting exploration and adventure in a climate that’s mild yet invigorating.
In December, Ha Long, Vietnam experiences a notable dip in temperatures, with minimums dropping to 8°C (46°F), while averages settle around 18°C (66°F) and daytime highs reaching up to 28°C (82°F). As the final month of the year, it marks a transition into cooler, more comfortable weather, perfect for exploring the stunning limestone karsts and islands. Compared to previous months, December's temperatures are significantly lower, particularly when juxtaposed with the summer heat, showcasing a shift toward a more temperate climate. Despite the chill, the pleasant days encourage outdoor adventures, making it an ideal time for tourists seeking to enjoy Ha Long’s breathtaking scenery without the oppressive heat of the preceding summer months.
In December, Ha Long experiences a gentle decline in precipitation, with total rainfall measuring 31 mm (1.2 in) over approximately 6 days. This marks a shift from the heavy downpours of the preceding months, particularly August, which sees an impressive 521 mm (20.5 in) of rain. As the year winds down, December's weather becomes milder, suggesting a cozy atmosphere perfect for enjoying the region's stunning landscapes. While rainfall is less frequent compared to peak months like July and August, it still contributes to the lush scenery Ha Long is known for, making this time of year a delightful blend of refreshing weather and tranquil beauty.
In December, Ha Long, Vietnam experiences a humidity level of 71%, reflecting a slight decline from the peak summer months but remaining relatively high. The trend throughout the year shows a gradual increase in humidity, particularly from June to August, where it reaches a staggering 90% in July. As the year progresses into the cooler months, humidity levels begin to drop, returning to December's level, which is similar to those in early winter months like January and November. This seasonal pattern reveals a consistent ebb and flow in moisture, contributing to Ha Long's lush landscapes but also hinting at the cozy warmth of its tropical climate.
In December, Ha Long, Vietnam experiences a UV Index of 7, categorized as high, which allows for a more forgiving burn time of 25 minutes compared to the preceding months. Notably, the UV levels have gradually decreased from their peak in the summer months, where values soared as high as 13 during the extreme sun exposure period from April to September. This trend indicates a gradual shift away from the intense sun exposure of late spring and summer, providing visitors with a calmer outdoor environment. However, even with a lower index, it's still essential to practice sun safety. For more detailed information on UV levels throughout the year, check out Ha Long UV Index.
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In December, Ha Long, Vietnam, typically basks in a pleasant average of 238 sunshine hours, rounding off the year's climatic patterns. This month showcases a gentle decline from the month before, aligning with a trend of decreasing sunlight as the year concludes. The sunshine hours in December are consistently higher than the winter months, with January's 170 hours forming the seasonal low. As the year progresses into spring, the sunlight peaks in May with 307 hours, illustrating Ha Long's vibrant allure during peak travel season. The gradual dip in daylight hours from late autumn through December indicates the shifting seasons, yet the lingering sunlight invites travelers to embrace the beauty of this coastal haven even as the year winds down.
In Ha Long, Vietnam, December brings a promising 53% chance of sunny weather, marking a notable increase compared to the previous months. As the year winds down, the likelihood of clear skies rises from November's 46% to a more optimistic outlook, providing a perfect backdrop for winter exploration. Interestingly, this upward trend contrasts sharply with the lower probabilities seen during the summer months, when chances of sunshine plummet to as low as 12% in August. Thus, December stands out as a delightful time for visitors seeking a mix of mild temperatures and enjoyable outdoor activities amidst the stunning landscapes of Ha Long.
In Ha Long, Vietnam, the daylight duration follows a captivating seasonal rhythm. The year begins with 10 hours of daylight in January, gradually increasing to a generous 13 hours by May and continuing through the summer months of June and July. As late summer gives way to autumn, daylight begins to wane, retracting to 12 hours in August and September, and settling back at 11 hours in October and November. By December, the daylight drops again to 10 hours, mirroring the year’s start. This fluctuation not only showcases the beauty of seasonal change but also invites travelers to enjoy the unique charm of Ha Long under both the abundant summer sun and the quieter winter days.
As December graces Ha Long, Vietnam, the average wind speed settles at a gentle 2.7 m/s (6 mph), echoing the tranquility that often accompanies the season. While the winds tend to be milder compared to the brisk October peak of 4.0 m/s (9 mph), December's breezes maintain a steady rhythm reminiscent of the earlier months. Compared to the slightly more turbulent summer highs in May and June, which reach 3.7 m/s (8 mph), December's winds embrace a calming shift, perfect for enjoying the breathtaking karst landscapes without the overpowering gusts. Overall, this month's wind patterns reflect a gradual transition into the serene cooler months, enhancing the peaceful ambiance of Ha Long.
Weather in Ha Long varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ha Long, focusing on differences in temperature, rainfall, humidity, and UV levels.
December weather features slightly warmer temperatures with an average of 18°C (66°F), peaking at a maximum of 28°C (82°F). It experiences a bit more rain than January, with 31 mm (1.2 in) over 6 days and a higher humidity level of 71%. In contrast, January sees a slight dip in temperature, averaging 18°C (64°F) with maximums reaching 26°C (80°F). Precipitation decreases to 28 mm (1.1 in) over just 5 days, and the humidity drops to 66%. For more details on the weather during this month, visit Ha Long weather in January.
In December, temperatures generally range from a minimum of 8°C (46°F) to a maximum of 28°C (82°F), with an average of 18°C (66°F). The month sees about 31 mm (1.2 in) of precipitation over six days, and humidity levels are consistently at 71%. In contrast, February experiences slightly cooler temperatures, with a minimum of 7°C (45°F) and a maximum of 27°C (80°F), while still averaging 18°C (65°F). Precipitation increases to 36 mm (1.4 in) across seven days, maintaining the same humidity level of 71%. This slight variation in weather reflects the transition from the end of winter into early spring. For more detailed insights, you can check Ha Long weather in February.
In December, the weather typically features milder temperatures with a minimum of 8°C (46°F) and an average of 18°C (66°F), peaking at a comfortable 28°C (82°F). The month experiences relatively low precipitation at 31 mm (1.2 in) over about 6 days, while humidity averages around 71%. In contrast, March offers warmer conditions, with minimum temperatures rising to 14°C (57°F), an average of 21°C (71°F), and maximums reaching up to 31°C (88°F). However, it has higher precipitation, totaling 52 mm (2.0 in) over approximately 15 days, alongside slightly lower humidity at 69%. For more specific insights, you may want to explore Ha Long weather in March.
When comparing the weather in December and April, there are notable differences in temperature and precipitation. December features milder conditions, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (82°F), while April sees warmer averages, with temperatures ranging from 14°C (58°F) to a high of 33°C (91°F). Additionally, April experiences significantly higher precipitation, with 91 mm (3.6 in) that falls over 15 days, compared to December’s 31 mm (1.2 in) spread over just 6 days. Humidity is slightly higher in December at 71%, compared to 64% in April. For more detailed information, you can visit Ha Long weather in April.
In December, the weather is milder, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (82°F) and an average of 18°C (66°F). The month sees relatively low precipitation at 31 mm (1.2 in) over just 6 days, along with a humidity level of 71%. In contrast, May experiences significantly higher temperatures, with a minimum of 19°C (66°F) and a maximum soaring to 36°C (98°F), averaging 27°C (81°F). However, May also brings much more rainfall, totaling 184 mm (7.2 in) across 19 days, while humidity remains slightly higher at 73%. For more detailed insights about the weather in Ha Long during this month, you can visit Ha Long weather in May.
In December, the weather is mild and comfortable, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (82°F) and an average of 18°C (66°F). The month sees relatively low precipitation, totaling 31 mm (1.2 inches) over about 6 days, and the humidity is moderate at 71%. In contrast, June experiences much warmer conditions, with temperatures soaring from a minimum of 23°C (74°F) to a scorching maximum of 38°C (100°F) and an average of 30°C (86°F). However, this warmth comes with significantly higher rainfall, reaching 240 mm (9.4 inches) spread across around 20 days, and higher humidity levels at 81%. For more specific details, refer to Ha Long weather in June.
In December, the weather is relatively mild, with temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (82°F) and an average of 18°C (66°F). Rainfall is moderate, with about 31 mm (1.2 in) of precipitation over six days, resulting in a humidity level of 71%. In contrast, July experiences much warmer temperatures, with a minimum of 25°C (77°F) and peaks of 36°C (98°F), averaging around 29°C (85°F). This month also sees significantly higher rainfall, with 287 mm (11.3 in) over 24 days, leading to an increase in humidity to 90%. For more details on the July weather in Ha Long, you can visit Ha Long weather in July.
December and August present notably different weather patterns. In December, temperatures range from a mild minimum of 8°C (46°F) to a comfortable maximum of 28°C (82°F), with an average of 18°C (66°F). The month sees relatively low precipitation of 31 mm (1.2 in) over just 6 days, and the humidity hovers around 71%. In stark contrast, August experiences much warmer conditions, with temperatures ranging from a minimum of 24°C (76°F) to a sweltering maximum of 36°C (97°F), averaging 28°C (83°F). However, it also brings significantly higher rainfall, accumulating 521 mm (20.5 in) over 28 days, coupled with increased humidity at 89%. For a more detailed look at August weather, check out Ha Long weather in August.
December and September present contrasting weather patterns. In December, temperatures range from a minimum of 8°C (46°F) to a maximum of 28°C (82°F), with an average of 18°C (66°F). The month sees relatively low precipitation, totaling 31 mm (1.2 in) over just 6 days, along with humidity at 71%. In contrast, September boasts much warmer temperatures, with a minimum of 22°C (72°F) and a maximum reaching 35°C (95°F), averaging 28°C (83°F). However, this warmth comes with increased rainfall, totaling 256 mm (10.1 in) across 23 days and higher humidity levels at 82%. For further details, you can check Ha Long weather in September.
December weather features milder temperatures with a minimum of 8°C (46°F) and an average of 18°C (66°F), peaking at 28°C (82°F). In contrast, October is considerably warmer, with temperatures ranging from a minimum of 17°C (63°F) to a maximum of 34°C (94°F) and an average of 25°C (77°F). Additionally, December sees much less rainfall, with only 31 mm (1.2 in) over 6 days, compared to October's substantial 204 mm (8.0 in) over 16 days. The humidity also remains slightly lower in December at 71%, compared to October's 77%. For more details, you can check Ha Long weather in October.
When comparing the weather in December to that of November, December tends to be slightly cooler, with average temperatures ranging from a minimum of 8°C (46°F) to a maximum of 28°C (82°F). In contrast, November boasts warmer averages, with temperatures ranging from a minimum of 12°C (54°F) to a maximum of 30°C (86°F). Additionally, December experiences less rainfall, with 31 mm (1.2 in) over 6 days, compared to November's 43 mm (1.7 in) spread over 9 days. Humidity levels remain similar, with December at 71% and November at 72%. For a more detailed look at November's climate, you can check Ha Long weather in November.
As December rolls in, Ha Long's weather transforms into a crisp and refreshing experience, distinct from the warmer months. The temperatures hover around a comfortable average of 18°C, with cooler nights dipping to a minimum of 8°C, perfect for cozy evenings. While the city does see some rain, with about 31 mm of precipitation over just six days, it’s the lower humidity of 71% that makes the air feel inviting. This refreshing change offers visitors a unique opportunity to explore Ha Long's stunning landscapes without the summer crowds. For a deeper dive into how the climate evolves throughout the year, check out Ha Long Climate.