Last updated: August 27, 2025
December in Ko Si Chang, Thailand offers a delightful climate characterized by pleasant temperatures and moderate humidity. The maximum daily temperature rarely exceeds 32°C (91°F), while the average temperature remains a comfortable 27°C (81°F), making it ideal for outdoor activities. Nights cool down to a cozy 18°C (64°F), perfect for enjoying the evenings. Visitors can expect light rainfall, with approximately 28 mm (1.1 in) of precipitation spread over just three days, allowing for ample sunshine and exploration. With a humidity level around 70%, December creates a refreshing atmosphere, perfect for soaking in the beauty and charm of this coastal paradise.
In December, Ko Si Chang experiences a delightful shift in temperatures, marking the start of the cooler season. With a minimum of 18°C (64°F), it offers a refreshing escape compared to the warmer months, while the average hovers around 27°C (81°F), perfectly suited for outdoor explorations. The maximum temperatures peak at 32°C (91°F), providing visitors with plenty of sunshine to enjoy the island's serene beaches and vibrant culture. The cooler nights invite a cozy ambiance, making December an ideal time to experience the charm of this Thai gem. Overall, this month strikes a harmonious balance between warm days and cool evenings, creating an inviting atmosphere for both relaxation and adventure.
In December, Ko Si Chang experiences a shift in its weather pattern, marking a notable transition toward the drier season. With only 28 mm (1.1 in) of precipitation, December stands out as one of the months with the least rainfall, following the heavy showers of the preceding months. The 3 days of rain not only highlights a significant drop in precipitation days compared to the peak of the monsoon season, but it also signals a welcome reprieve for residents and travelers alike. As the island moves from the tumultuous rains of October and September—where 250 mm (9.8 in) and 232 mm (9.1 in) fell, respectively—December's gentler climate offers a serene atmosphere perfect for enjoying the island's picturesque landscapes and vibrant culture.
December in Ko Si Chang, Thailand, marks a notable decline in humidity, settling at 70% after the peak of the rainy season. This month shows a significant dip from the soaring levels of 88% seen in August and 86% in the summer months. As the year draws to a close, humidity begins to ease compared to the oppressive heights of 80% to 85% experienced earlier in the monsoon season. Overall, December offers a refreshing respite from the sweltering humidity that characterizes the preceding months, making it a more comfortable time to enjoy the island's natural beauty.
In December, the UV Index in Ko Si Chang, Thailand drops to 9, categorized as very high, with a burn time of 15 minutes. This marks a slight decrease from the extreme levels seen throughout much of the year, where indices frequently reached 13 to 14 from February to October. Notably, the transition from November to December indicates a trend towards more manageable UV exposure, as the region experiences its lowest UV levels of the year. Nevertheless, even with the reduced index, sun protection remains crucial. For an in-depth look at UV levels throughout the year, visit Ko Si Chang UV Index.
UV Risk Categories
December in Ko Si Chang, Thailand, brings a delightful abundance of sunshine, with 317 hours of bright, sunny days. This month stands as a testament to the island's charming climatic allure, falling just short of the sunniest months of March and April, which boast impressive totals of 336 and 321 hours respectively. While the year starts off with moderate sunshine, gradually peaking towards mid-year, it’s clear that December’s radiant skies offer a perfect backdrop for outdoor adventures. With the tranquil beauty of this month, visitors can bask in the warmth of the sun, making December an ideal time to explore the stunning landscapes and vibrant culture of this picturesque destination.
In Ko Si Chang, Thailand, December sees a promising likelihood of sunny weather, with a 60% chance of sun that contributes to a pleasant climate. This positive trend contrasts sharply with the preceding months of the rainy season, where chances of sunshine plummet to as low as 10% during the height of August and September. As the year winds down, November offers a slight improvement at 25%, paving the way for a more favorable December. Following the erratic weather pattern, December emerges as a refreshing breath of fresh air, making it an ideal time for visitors seeking sunshine and warmth to enjoy the island's stunning landscapes.
In Ko Si Chang, Thailand, the daylight duration exhibits a gentle yet discernible rhythm throughout the year. From January to February, the days remain consistent at 11 hours, providing a tranquil start to the year. As spring approaches in March, daylight stretches to 12 hours, maintaining this generous span through the summer months of April to September. This period of extended daylight promotes a lively atmosphere, perfect for outdoor adventures. However, as the year wanes, daylight contracts again, returning to 11 hours in October and November, before closing out the year in December with the same duration, offering a sense of continuity and balance in the tropical paradise.
As December rolls into Ko Si Chang, the island experiences an invigorating breeze, with an average wind speed of 4.4 m/s (10 mph), creating a refreshing ambiance that invites outdoor adventures. This month holds a noticeable uptick from the slightly calmer winds of November, which clocked in at 3.9 m/s. A consistent trend emerges as we analyze the year's wind patterns—with a peak in June at 4.8 m/s, the winds tend to fluctuate, generally ranging from the lower 3 m/s in April and September to more spirited gusts in the middle of the year. December's breezy charm not only enhances its mild winter weather but also sets the tone for the vibrant activities that characterize this enchanting Thai destination.
Weather in Ko Si Chang varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Ko Si Chang, focusing on differences in temperature, rainfall, humidity, and UV levels.
In December, the weather tends to be warm with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 32°C (91°F), and an average of 27°C (81°F). This month also experiences moderate humidity at 70% and receives about 28 mm (1.1 in) of precipitation over three days. In contrast, January shows similar temperatures, with a minimum of 18°C (64°F) and a slightly lower maximum of 31°C (89°F), maintaining the same average of 27°C (81°F). Precipitation decreases to 24 mm (0.9 in) over three days, and the humidity drops to 59%. Overall, while both months are quite similar in temperature, January is slightly drier and more comfortable. For more details, you can check out Ko Si Chang weather in January.
In December, temperatures generally range from a minimum of 18°C (64°F) to a maximum of 32°C (91°F), with an average of 27°C (81°F). The month sees about 28 mm (1.1 in) of precipitation spread over 3 days, accompanied by a humidity level of 70%. In contrast, February experiences slightly warmer nights with a minimum temperature of 21°C (70°F) and maintains the same maximum of 32°C (89°F), resulting in an average temperature of 27°C (82°F). Precipitation decreases to 19 mm (0.7 in) over 4 days, and humidity drops significantly to 58%. For more details, you can check Ko Si Chang weather in February. Overall, February tends to be drier and less humid than December.
December and March exhibit some noticeable differences in weather patterns. In December, temperatures range from a minimum of 18°C (64°F) to a maximum of 32°C (91°F), with an average of 27°C (81°F). The month experiences about 28 mm (1.1 in) of precipitation over just 3 days and maintains a higher humidity level of 70%. In contrast, March sees warmer minimum temperatures at 24°C (76°F) and a slightly higher average of 29°C (84°F), yet it has a similar maximum of 32°C (90°F). Rainfall increases to 38 mm (1.5 in) over a longer period of 7 days in March, while humidity drops to a more comfortable 61%. For a more detailed look at March weather specifics, check out Ko Si Chang weather in March.
December and April showcase contrasting weather patterns. In December, temperatures range from a minimum of 18°C (64°F) to a maximum of 32°C (91°F), with an average of 27°C (81°F) and relatively low precipitation of 28 mm (1.1 in) over just 3 days. The humidity remains steady at 70%. In contrast, April features warmer temperatures, with minimums of 22°C (71°F) and maximums reaching 34°C (93°F), averaging 29°C (85°F). However, it experiences significantly higher rainfall, totaling 100 mm (3.9 in) over 14 days, while humidity remains consistent at 70%. For more detailed weather information, see Ko Si Chang weather in April.
In December, the weather is generally warm and pleasant, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 32°C (91°F) and an average of 27°C (81°F). The month sees relatively low precipitation at 28 mm (1.1 in) over about three days, and humidity levels around 70%. In contrast, May experiences even higher temperatures, with a minimum of 23°C (74°F) and a maximum of 34°C (93°F), averaging at 29°C (85°F). However, it is also significantly wetter, receiving 160 mm (6.3 in) of rainfall over 19 days, accompanied by increased humidity at 80%. For more details, you can check the Ko Si Chang weather in May.
In December, the weather features milder temperatures, with minimums around 18°C (64°F) and an average of 27°C (81°F), making it a comfortable month overall. The precipitation is relatively low at 28 mm (1.1 in) over just three days, along with a moderate humidity level of 70%. In contrast, June presents a warmer climate, with minimum temperatures rising to 26°C (80°F) and an average of 29°C (85°F). This month experiences significantly higher rainfall, totaling 99 mm (3.9 in) over 21 days, along with increased humidity levels at 85%. For more detailed insights into June weather, you can check Ko Si Chang weather in June.
December and July exhibit notable differences in weather patterns. In December, temperatures range from a minimum of 18°C (64°F) to a maximum of 32°C (91°F), with an average of 27°C (81°F) and relatively low precipitation of 28 mm (1.1 in) over just 3 days, complemented by a humidity level of 70%. Conversely, July experiences warmer conditions, with minimum temperatures starting at 26°C (79°F) and an average of 29°C (84°F), peaking at 32°C (90°F). However, it is significantly wetter, receiving 134 mm (5.3 in) of rainfall over 23 days and maintaining a higher humidity level of 86%. For more details on July's weather specifics, you can check Ko Si Chang weather in July.
When comparing the weather in December and August, a distinct contrast emerges. December features milder temperatures with a minimum of 18°C (64°F) and a maximum of 32°C (91°F), along with lower humidity levels at 70%. In contrast, August experiences warmer nights with a minimum of 26°C (79°F) and higher humidity at 88%, culminating in an average temperature of 29°C (84°F) and frequent rainfall totaling 138 mm (5.4 in) over 22 days. For more detailed information, you can check the Ko Si Chang weather in August.
In December, the weather presents a slightly cooler ambiance compared to September, with temperatures ranging from a minimum of 18°C (64°F) to an average of 27°C (81°F) and a maximum of 32°C (91°F). Precipitation is relatively low in December, totaling only 28 mm (1.1 in) over three days, and the humidity at 70% allows for a comfortable outdoor experience. In contrast, September sees much higher humidity levels at 87% and a significantly greater amount of rainfall, with 250 mm (9.8 in) over 25 days, making it a much wetter month. For more details on the weather during September, you can find information here: Ko Si Chang weather in September.
The weather in December is notably drier and less humid compared to October. While December boasts an average temperature of 27°C (81°F) with a minimum of 18°C (64°F) and a maximum of 32°C (91°F), October tends to be warmer, with an average temperature of 28°C (82°F) and a minimum of 24°C (76°F). Notably, October experiences significantly higher precipitation at 232 mm (9.1 in) over 22 days, whereas December sees only 28 mm (1.1 in) across just 3 days. Additionally, October has a higher humidity level of 83%, compared to December's 70%. For more detailed information on the weather in October, you can visit Ko Si Chang weather in October.
In comparing the weather in December and November, December generally exhibits slightly cooler temperatures, with a minimum of 18°C (64°F) and an average of 27°C (81°F), while November's temperatures are notably warmer, starting at a minimum of 23°C (74°F) and averaging 28°C (82°F). Maximum temperatures remain consistent between the two months, peaking at 32°C (91°F). Additionally, December experiences significantly less precipitation, with only 28 mm (1.1 in) over 3 days compared to November's 56 mm (2.2 in) across 11 days, suggesting drier conditions as the year comes to a close. Humidity levels are also lower in December, averaging 70%, compared to November's 78%. For a detailed overview of November's weather, you can visit Ko Si Chang weather in November.
In December, Ko Si Chang experiences a delightful shift in weather, marking a transition from the humid heat of previous months. With average temperatures hovering around a pleasant 27°C, this month offers a refreshing respite and makes outdoor activities more enjoyable. The lower humidity levels at about 70% and only a few days of rain contribute to the island's charm during this time. Compared to the peak summer months, December is characterized by cooler evenings and moderate daytime warmth, creating an ideal setting for visitors. For a detailed overview of the island's climate, check the Ko Si Chang Climate page.