Last updated: August 28, 2025
December in Cat Ba, Vietnam offers a mild climate that invites exploration and adventure. With maximum temperatures reaching around 26°C (80°F) and an average of 19°C (67°F), the weather is pleasantly cool but comfortable. The minimum temperature can dip to 10°C (50°F), so light layering is advisable. Rain is a common guest this month, contributing to an average precipitation of 42 mm (1.6 in) over approximately 8 days, resulting in a humidity level of 71% that enhances the lush greenery of the island. Visitors can enjoy the natural beauty and vibrant culture of Cat Ba while experiencing its refreshing December weather.
In December, Cat Ba, Vietnam bids farewell to the cooler months with a gentle transition into winter. The temperatures experience a slight dip with minimums around 10°C (50°F), ensuring a crispness in the air that invigorates the senses. Average temperatures sit comfortably at 19°C (67°F), while highs can reach up to 26°C (80°F), providing pleasant days ideal for exploring the island's stunning landscapes. This month reveals a striking contrast to the sweltering summer months, yet retains a charm that draws visitors seeking both adventure and tranquility. The overall trend showcases a steady coolness as the year ends, making December a perfect time to experience Cat Ba’s serene beauty without the crowds of the peak tourist season.
December in Cat Ba, Vietnam, sees a modest precipitation total of 42 mm (1.6 in), marking a noticeable decline from the heavy rains typical of earlier months. With rainfall occurring over only 8 days, December stands out for its relatively dry conditions, especially when compared to the peak of the rainy season in August with its staggering 567 mm and 25 rainy days. As the year closes, the island experiences a shift towards drier weather, setting the stage for a more tranquil and inviting climate, ideal for exploring Cat Ba's stunning landscapes. The gradual tapering off of precipitation not only highlights the seasonal characteristics but also provides an opportunity to appreciate the natural beauty amidst fewer rainy interruptions.
In Cat Ba, Vietnam, December brings a humidity level of 71%, which is slightly lower than the peaks experienced in the summer months of June and July, where humidity soars to an impressive 81% and 90%, respectively. This transition into the cooler season shows a welcoming trend towards drier conditions compared to the intense humidity of the preceding months. Following a gradual decline from the high of 73% in May, December's humidity aligns more closely with the early winter months, such as January and February, which exhibit humidity readings of 66% and 71%. Overall, December stands out as part of a shift towards milder humidity levels, signaling a pleasant reprieve before the onset of the wet season.
In December, Cat Ba, Vietnam, experiences a UV Index of 7, categorizing it as high. This is a noticeable shift from the extreme levels seen during the peak months of summer, where UV Index readings soared to 13, necessitating just 10 minutes of exposure before sunburn could occur. As the year winds down, burn times extend to 25 minutes, offering slightly more leeway for outdoor activities. While December's UV levels are lower compared to the intense summer months, it's still advisable to take precautions, especially during midday hours. For those planning to soak in the sun, understanding the UV trends is vital. Learn more at Cat Ba UV Index.
UV Risk Categories
As the year draws to a close, December in Cat Ba, Vietnam, enjoys a delightful 239 hours of sunshine, reflecting a trend of abundant light as one moves through the months. Starting with a modest 179 hours in January, the sun steadily peaks in May with 312 hours, creating a glow that draws travelers to this tropical paradise. The summer months maintain impressive sunlight, averaging around 298 hours from June to July, before a gradual tapering occurs in the autumn. Even with a slight decline, December’s sunlit hours are a captivating welcome to the new year, captured perfectly among the fading bustle of the high season. Visitors can revel in this enchanting ambiance, underscoring Cat Ba’s irresistible charm as a winter getaway.
In Cat Ba, Vietnam, December offers a promising chance of sunshine, with a 55% likelihood of sunny days. As the year approaches its end, the trend shows an upward swing in clear skies compared to the preceding month of November, which boasts a 50% chance of sun. Following a series of wetter months displaying notably lower probabilities—like June and August, which dip to 15% and 14%, respectively—the arrival of December signals a welcome shift towards brighter weather. This refreshing uptick suggests that visitors can enjoy the island's natural beauty under the warmth of the sun, making it an ideal time to explore the stunning landscapes and captivating vistas that Cat Ba has to offer.
In Cat Ba, Vietnam, December marks the onset of shorter days, as daylight dips to 10 hours—the least amount of sunlight since the year began. The trend reveals a gradual increase in daylight from January to June, peaking at 13 hours during the summer months. However, as the year transitions towards winter, a consistent decline begins, dropping back to 11 hours in October and November before the final plunge in December. This cyclical pattern not only highlights the region's tropical climate but also sets the stage for the vibrant natural beauty and experiences that Cat Ba offers during the varying lengths of daylight throughout the year.
As December rolls into Cat Ba, Vietnam, the charm of the island is accentuated by a gentle breeze averaging 4.3 m/s (10 mph), reminiscent of the conditions seen in both January and April. This steady windspeed provides a pleasant backdrop for exploring the archipelago's stunning landscapes. Interestingly, November experienced a slight uptick with an average of 4.6 m/s, suggesting a transition into the cooler, yet inviting winter months. In contrast, October boasted the strongest gusts at 6.0 m/s, setting a vigorous pace before the calmer December breezes. Overall, the wind trends in Cat Ba reflect a dynamic yet harmonious rhythm throughout the year, contributing to the island's enchanting allure during this time.
Weather in Cat Ba varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Cat Ba, focusing on differences in temperature, rainfall, humidity, and UV levels.
December and January exhibit similar temperature patterns, with December boasting a slightly warmer average of 19°C (67°F) compared to January's 18°C (65°F). Both months experience mild minimum temperatures of around 10°C (50°F), but December reaches a maximum of 26°C (80°F), while January peeks at 24°C (75°F). In terms of precipitation, December sees more rainfall at 42 mm (1.6 in) over 8 days, compared to January's 34 mm (1.3 in) over 7 days. Additionally, January enjoys lower humidity levels at 66%, compared to December’s 71%. For more detailed information, visit Cat Ba weather in January.
In December, the weather features a warm average temperature of 19°C (67°F), with highs reaching up to 26°C (80°F) and lows around 10°C (50°F). The month typically sees about 42 mm (1.6 in) of precipitation over 8 days, maintaining a humidity level of 71%. In contrast, February experiences slightly cooler temperatures, with an average of 18°C (65°F), a maximum of 24°C (75°F), and a minimum of 9°C (49°F). Precipitation decreases to 36 mm (1.4 in) over 7 days, while humidity remains consistent at 71%. For more detailed weather information, you can explore Cat Ba weather in February.
December and March exhibit noticeable differences in weather patterns. In December, temperatures range from a minimum of 10°C (50°F) to a maximum of 26°C (80°F), with an average of 19°C (67°F). This month experiences some precipitation, with around 42 mm (1.6 in) falling over approximately 8 days, and humidity levels averaging 71%.
In contrast, March has a milder climate, with minimum temperatures of 16°C (60°F) and maximums reaching 27°C (80°F), resulting in an average temperature of 21°C (70°F). Precipitation increases slightly to 50 mm (2.0 in) but occurs over more days, roughly 13, and humidity remains comparable at 69%. For more detailed insights into March weather, you can check Cat Ba weather in March.
When comparing the weather in December and April, April emerges as the warmer month with average temperatures ranging from a minimum of 16°C (61°F) to a maximum of 29°C (85°F), compared to December's range of 10°C (50°F) to 26°C (80°F). Precipitation is also notably higher in April, with 84 mm (3.3 in) over 11 days, while December experiences 42 mm (1.6 in) of rain across 8 days. Additionally, April boasts slightly lower humidity at 64%, compared to December's 71%, making the latter feel a bit more muggy. For more detailed insights, you can check Cat Ba weather in April.
December and May exhibit significant differences in weather patterns. December experiences milder temperatures, with a minimum of 10°C (50°F) and an average of 19°C (67°F), peaking at 26°C (80°F). In contrast, May is considerably warmer, with temperatures ranging from a minimum of 20°C (69°F) to an average of 27°C (81°F), reaching a high of 33°C (92°F). Additionally, May sees increased precipitation, totaling 139 mm (5.5 in) over 15 days, compared to December's 42 mm (1.6 in) across 8 days. Humidity levels remain relatively similar between the two months, with December at 71% and May slightly higher at 73%. For more details on the weather specifically in May, you can visit Cat Ba weather in May.
December and June exhibit markedly different weather conditions. In December, temperatures range from a mild 10°C (50°F) to a comfortable maximum of 26°C (80°F), with an average of 19°C (67°F). This month sees relatively low precipitation at 42 mm (1.6 in) over about 8 days, accompanied by a humidity level of 71%. In contrast, June is significantly warmer, with minimum temperatures starting at 24°C (76°F) and reaching a high of 34°C (94°F), averaging around 30°C (86°F). Precipitation also increases dramatically to 194 mm (7.6 in) spread across about 15 days, coupled with a higher humidity level of 81%. For a closer look at the weather specifics in June, you can check out Cat Ba weather in June.
When comparing December and July weather, the contrast is striking. December features milder temperatures, with a minimum of 10°C (50°F) and an average of 19°C (67°F), peaking at 26°C (80°F). It experiences relatively low precipitation of 42 mm (1.6 in) over just 8 days, along with a humidity level of 71%. In stark contrast, July is significantly warmer, with temperatures ranging from a minimum of 26°C (78°F) to an average of 29°C (85°F), and a maximum of 33°C (92°F). This month is also much wetter, with a substantial 325 mm (12.8 in) of rainfall over 21 days, accompanied by high humidity at 90%. For more detailed information, you can check out Cat Ba weather in July.
In December, the weather is significantly cooler, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 26°C (80°F) and an average of 19°C (67°F). The month experiences moderate precipitation of 42 mm (1.6 in) over about 8 days, with humidity at 71%. In contrast, August is much hotter and wetter, with temperatures starting at a minimum of 25°C (78°F), averaging 29°C (85°F), and peaking at 34°C (93°F). During this month, rainfall is ample, totaling 567 mm (22.3 in) over 25 days, along with high humidity at 89%. For more details on the August climate, you can visit Cat Ba weather in August.
In December, the weather is notably milder with minimum temperatures around 10°C (50°F) and an average high of 26°C (80°F), while humidity hovers around 71%. This month experiences relatively low precipitation, averaging 42 mm (1.6 in) over about 8 days. In contrast, September brings much warmer conditions, with lows of 25°C (78°F) and average highs reaching 33°C (92°F). However, it is also much wetter, receiving a significant 312 mm (12.3 in) of rain over approximately 23 days, and humidity levels are higher at 82%. For more detailed weather insights, check out Cat Ba weather in September.
In comparing the weather patterns of December and October, December tends to be milder, with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 26°C (80°F), averaging around 19°C (67°F). Contrastingly, October is warmer, featuring a minimum temperature of 19°C (67°F) and peaking at 32°C (90°F), with an average of 26°C (79°F). Additionally, October experiences significantly higher rainfall, accumulating 284 mm (11.2 in) over 17 days, compared to December's 42 mm (1.6 in) over just 8 days. The humidity remains relatively high in both months, at 77% in October and 71% in December. For more detailed insights on October weather, you can refer to Cat Ba weather in October.
In comparing the weather between November and December, December presents a slightly cooler climate with temperatures ranging from a minimum of 10°C (50°F) to a maximum of 26°C (80°F), averaging around 19°C (67°F). In contrast, November is warmer, with a minimum of 14°C (57°F) and a maximum of 28°C (83°F), averaging 23°C (74°F). December also sees reduced precipitation, with 42 mm (1.6 in) over 8 days, compared to November's 53 mm (2.1 in) over 10 days. Humidity levels remain relatively consistent, with December at 71% and November at 72%. For more detailed insights, check out Cat Ba weather in November.
As December rolls into Cat Ba, the weather showcases a delightful contrast to the warmer months, offering a more temperate climate with milder temperatures and an inviting atmosphere. While daytime highs can still reach a pleasant 26°C, the average cools down to a comfortable 19°C, making it an ideal time for exploration. However, the island experiences about 8 days of light rainfall, contributing to a 71% humidity level that adds a touch of tropical charm. This seasonal shift brings a refreshing respite, perfect for outdoor adventures or cozy evenings by the sea. For more insights into the year-round climate of this stunning destination, check out Cat Ba Climate.