Last updated: August 28, 2025
In December, Co To, Vietnam, experiences a delightful blend of mild temperatures and refreshing humidity. With a maximum temperature reaching 25°C (77°F) and an average of 18°C (66°F), the weather is comfortably cool, making it an ideal time for exploration. The temperature dips to a minimum of 11°C (51°F) at night, inviting cozy evenings. Visitors should be prepared for light rains, as the island sees about 49 mm (1.9 in) of precipitation over approximately 10 rainy days throughout the month. The overall humidity hovers around 70%, creating a pleasant and invigorating atmosphere perfect for experiencing the natural beauty of this coastal paradise.
In Co To, Vietnam, December ushers in cooler temperatures, marking a noticeable transition from the warmer months. With minimums dropping to 11°C (51°F) and averages settling around 18°C (66°F), visitors experience a refreshing reprieve from the heat. The maximum temperature of 25°C (77°F) still offers pleasant afternoons, perfect for exploring the breathtaking landscapes. This pattern sets December apart from the preceding months, where temperatures steadily rise, culminating in sizzling summer averages. As the year closes, Co To transforms into a comfortable retreat, inviting travelers to enjoy its serene beauty under the cooler skies.
In Co To, Vietnam, December brings a welcome respite from the heavy downpours of the summer months. With precipitation averaging 49 mm (1.9 in) over approximately 10 rainy days, the month signals a shift towards drier weather compared to the peak rainfall from June to August, where totals soared past 500 mm. While November mirrors January with just 39 mm (1.5 in) of rain, December’s precipitation reflects a slight increase, hinting at a transition into the drier winter months ahead. This period seems ideal for those seeking a balance of pleasant weather and occasional showers, as nature prepares for the cooler, sunlit days that follow.
In December, Co To, Vietnam experiences a moderate humidity level of 70%, providing a refreshing transition as the year draws to a close. This figure reflects a slight decrease from the high summer months, where humidity peaks at an impressive 86% in both July and August. Notably, as the year progresses from January’s more comfortable 66% up to the humid heights of late summer, December's levels suggest a trend toward a more pleasant climate. With the humidity gradually falling from November's 69% to its December mark, visitors can expect a relatively mild and enjoyable atmosphere, ideal for exploring the scenic beauty of Co To during this time.
As December rolls in, Co To, Vietnam, experiences a noteworthy shift in its UV Index, dropping to 7, categorized as high with a burn time extending to 25 minutes. This marks a slight decline from the extreme levels of summer months, where values peaked at 14 in July and August. The trend shows a gradual decrease from November's 9, suggesting a respite from the intense sun exposure prevalent in the earlier months. With the holiday season approaching, visitors can enjoy outdoor activities with a bit more skin protection, allowing for a comfortable balance between fun in the sun and the need for caution. To learn more about UV Index trends throughout the year, check out Co To UV Index.
UV Risk Categories
In Co To, Vietnam, December brings a delightful blend of sunny days, providing 242 hours of sunshine—a charming prelude to the New Year. As the year progresses, one can observe a gradual increase in sunshine hours from the cold months of January (185 hours) through to the blooming beauty of May (314 hours). The summer months shine the brightest, peaking during May and June, when the sun graces the island with an impressive over 300 hours of light. However, as the year winds down, the hours subtly taper off in December, creating a serene and warm atmosphere that invites visitors to bask in the pleasant sunlight before the chill of winter. This trend not only makes Co To an appealing destination year-round but also showcases the gentle ebb and flow of seasonal sunshine that enriches its coastal charm.
In December, visitors to Co To, Vietnam can expect a moderate chance of sunny weather, with a 55% likelihood of enjoying bright, clear skies. As the year progresses, the trend reveals a dip in sunny days from the peak in February at 63%, with notable declines through the summer months. However, as autumn sets in, November shows a resurgence at 56%, paving the way for December to maintain a favorable outlook. This makes December a promising time to experience Co To's scenic beauty, as the chances of sunshine provide a wonderful backdrop for exploration and relaxation.
In Co To, Vietnam, the charm of daylight ebbs and flows throughout the year, creating a rhythmic pattern that defines each month. Starting with 11 hours of daylight in both January and February, the days gradually lengthen as spring approaches, peaking at an inviting 13 hours in May through July. This brief summer burst gives way to a gradual decline, with daylight tapering off to 12 hours in August and September, and further diminishing to 11 hours by October and November. By December, residents and visitors alike experience the briefest daylight of the year at just 10 hours, signaling the onset of winter. This steady cycle not only accentuates the beauty of the changing seasons but also invites a reflective pause as the days grow shorter, enriching the landscape with a softer, more subdued light.
In December, Co To, Vietnam experiences a gentle yet invigorating breeze, with an average wind speed of 6.3 m/s (14 mph). This month marks a transition as the winds pick up from the calmer days of autumn, showcasing a steady increase in strength compared to earlier months like February and September, where winds dipped to around 3.5 m/s (8 mph) and 3.7 m/s (8 mph), respectively. Embracing the year-end, December’s winds are reminiscent of the higher speeds seen in October and November, where gusts reached 8.2 m/s (18 mph) and 6.5 m/s (15 mph). As the island welcomes the winter season, the refreshing December winds create a perfect backdrop for exploration and relaxation, inviting visitors to revel in the charm of Co To's coastal beauty.
Weather in Co To varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Co To, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, temperatures range from a minimum of 11°C (51°F) to a maximum of 25°C (77°F), with an average of 18°C (66°F). The month experiences approximately 49 mm (1.9 in) of precipitation over 10 days, accompanied by a humidity level of 70%. In contrast, January sees slightly cooler temperatures, with a minimum of 9°C (48°F) and a maximum of 22°C (72°F), averaging 17°C (63°F). Precipitation in January is reduced to 39 mm (1.5 in) spread over 8 days, and humidity falls to 66%. Overall, January tends to be cooler and slightly drier than December. For more details on January weather, you can check Co To weather in January.
In December, the weather features milder temperatures with a minimum of 11°C (51°F) and a maximum of 25°C (77°F), averaging around 18°C (66°F). The month experiences about 49 mm (1.9 in) of precipitation over approximately 10 days, while humidity hovers around 70%. In contrast, February sees slightly cooler temperatures, with a minimum of 10°C (50°F) and a maximum of 22°C (73°F), maintaining the same average of 18°C (64°F). Precipitation increases slightly to 51 mm (2.0 in) but is spread over just 8 days, resulting in a humidity level of 71%. For more details on February weather, you can visit Co To weather in February.
In December, the weather typically features a minimum temperature of 11°C (51°F) and an average of 18°C (66°F), while reaching a maximum of 25°C (77°F). During this month, there is an average precipitation of 49 mm (1.9 in) spread over 10 days, with humidity levels around 70%. In contrast, March sees a slight increase in temperatures, with a minimum of 15°C (60°F) and an average of 21°C (69°F), also peaking at 25°C (77°F). Precipitation rises to 57 mm (2.2 in) over 12 days, and humidity remains similar at 73%. For more insights on March weather, visit Co To weather in March.
In December, the weather is generally mild with minimum temperatures around 11°C (51°F) and maximums reaching up to 25°C (77°F), averaging 18°C (66°F). The month experiences around 49 mm (1.9 in) of precipitation over approximately 10 days, with humidity levels at about 70%. In contrast, April warms up significantly with minimum temperatures of 16°C (62°F) and maximums hitting 28°C (82°F), leading to an average of 23°C (74°F). This month sees increased precipitation, totaling 91 mm (3.6 in) over about 12 days, and a slight rise in humidity to 71%. For a more detailed look at the April weather, you can visit Co To weather in April.
December and May present distinct weather patterns, showcasing the transition from cooler to warmer months. In December, temperatures range from a minimum of 11°C (51°F) to a maximum of 25°C (77°F), with an average of 18°C (66°F). This month sees about 49 mm (1.9 in) of precipitation over approximately 10 days, and humidity levels hover around 70%. In stark contrast, May experiences much warmer temperatures, with a minimum of 20°C (68°F) and a maximum of 31°C (88°F), averaging 27°C (80°F). Precipitation significantly increases to 137 mm (5.4 in) across 16 days, and humidity rises slightly to 76%. For more detailed weather insights, check out Co To weather in May.
When comparing the weather in December and June, it's clear that each month brings distinct conditions. December features milder temperatures, with a minimum of 11°C (51°F) and an average of 18°C (66°F), while June is significantly warmer, boasting a minimum of 25°C (77°F) and an average of 29°C (85°F). Precipitation also varies greatly, with December receiving 49 mm (1.9 in) across 10 days and June experiencing much heavier rainfall of 252 mm (9.9 in) over 19 days. Additionally, humidity levels are slightly higher in June at 79%, compared to December's 70%. For more details on June's weather, you can visit Co To weather in June.
When comparing the weather in December and July, it's clear that these two months present strikingly different climates. In December, temperatures range from a mild 11°C (51°F) to a comfortable 25°C (77°F), with an average of 18°C (66°F). The month experiences moderate precipitation, totaling 49 mm (1.9 in) over about 10 days, and humidity levels around 70%. In contrast, July brings much warmer temperatures, with a minimum of 26°C (79°F) and a maximum reaching 32°C (89°F), averaging 29°C (85°F). Rainfall significantly increases during this month, with 435 mm (17.1 in) falling over 22 days, and humidity levels rise to 86%. For more details on July weather, you can check out Co To weather in July.
December and August exhibit starkly contrasting weather patterns. In December, temperatures range from a minimum of 11°C (51°F) to a maximum of 25°C (77°F), with an average of 18°C (66°F). The month experiences lower humidity at around 70% and moderate precipitation of 49 mm (1.9 in), occurring over approximately 10 days. In contrast, August sees significantly warmer temperatures, with minimums of 26°C (78°F) and maximums reaching up to 32°C (89°F), averaging 29°C (84°F). August is characterized by high humidity at 86% and an intense amount of rainfall, totaling 594 mm (23.4 in) spread over about 24 days. For more insights into the weather in August, check out Co To weather in August.
In December, the weather features a milder temperature range, with minimums around 11°C (51°F) and maximums peaking at 25°C (77°F), resulting in an average temperature of 18°C (66°F). The month sees significantly less precipitation than September, with only 49 mm (1.9 in) over approximately 10 days and a humidity level of 70%. Conversely, September presents a much warmer climate, characterized by a minimum temperature of 25°C (77°F) and maximums reaching 31°C (88°F), averaging 28°C (83°F). This month is notably wetter, recording 360 mm (14.2 in) of rainfall across 22 days, along with higher humidity at 78%. For more details, check Co To weather in September.
In comparing the weather of December and October, December offers milder temperatures with a minimum of 11°C (51°F) and an average of 18°C (66°F), peaking at 25°C (77°F). In contrast, October experiences much warmer conditions, with temperatures ranging from a minimum of 20°C (68°F) to an average of 26°C (78°F), and maximums reaching 31°C (88°F). Additionally, October is significantly wetter, receiving 273 mm (10.8 in) of precipitation across 16 days, compared to December's 49 mm (1.9 in) over just 10 days. Despite both months having similar humidity levels of around 70-72%, October presents a more humid and rainy experience. For more details, check out Co To weather in October.
In comparing the weather between December and November, December tends to be slightly cooler, with average temperatures ranging from 11°C (51°F) to a max of 25°C (77°F), compared to November’s milder range of 15°C (59°F) to 27°C (80°F). Precipitation also increases slightly in December, with 49 mm (1.9 in) over about 10 days, while November sees 39 mm (1.5 in) across 9 days, resulting in comparable humidity levels of 70% and 69%, respectively. For more details on November’s weather, you can check Co To weather in November.
In December, Co To's weather shifts into a cooler, yet still pleasant phase. With milder temperatures averaging around 18°C, this month stands apart from the warmer summer months. While there are occasional rains, bringing about 49mm of precipitation over approximately 10 days, the humidity remains relatively high at 70%, contributing to a distinct crispness in the air. This unique climate invites travelers to enjoy the serene beauty of the island without the throngs of tourists typical in peak seasons. For a more detailed insight into the region's weather patterns, visit Co To Climate.