Last updated: August 27, 2025
In January, Ko Si Chang offers a delightful tropical climate with average temperatures around 27°C (81°F). Visitors can expect maximum daytime heats reaching 31°C (89°F), while nights cool down to a pleasant 18°C (64°F). This month sees a modest 24 mm (0.9 in) of rainfall spread over about 3 days, ensuring a mix of sun and occasional showers. The humidity level hovers around 59%, creating a comfortable atmosphere perfect for exploring the island's natural beauty and cultural charm. Enjoy an ideal escape in this picturesque Thai destination!
In January, Ko Si Chang experiences a refreshing start to the year with temperatures ranging from a cool 18°C (64°F) at night to a pleasant 31°C (89°F) during the day, resulting in an inviting average of 27°C (81°F). As the month transitions into February, the warmth gently increases, with nighttime lows rising to 21°C (70°F) and daytime highs peaking at 32°C (89°F). This trend of steadily rising temperatures continues into March and April, where the daily averages hover around 29°C (84°F), peaking at a balmy 34°C (93°F). As summer rolls in from May to August, temperatures remain consistent, with nightly lows stabilizing at around 23-26°C (74-80°F), while daytime highs fluctuate between 31-34°C (89-93°F). The months of September through November see a slight dip, with averages gently leveling out and nighttime temperatures dropping comfortably, yet still maintaining a warm ambience. Even as December arrives, the island retains its charm, featuring cool evenings and vibrant sunny days, solidifying Ko Si Chang's appeal as a year-round tropical destination.
In January, Ko Si Chang experiences relatively low precipitation, recording only 24 mm (0.9 in) over an average of just 3 rainy days. This sets the tone for the early months of the year, where rainfall remains modest, with February seeing a slight drop to 19 mm (0.7 in). However, as the season progresses into March, rainfall begins to pick up substantially, reaching 38 mm (1.5 in) and signaling the onset of more frequent showers. The true turning point arrives in April, when precipitation skyrockets to 100 mm (3.9 in), accompanied by increased rainy days. This upward trend culminates towards the middle of the year, especially in September, which sees a staggering 250 mm (9.8 in) over 25 days, characterizing the peak of the wet season. As the year transitions back to drier months, November and December offer brief respites, but the overall pattern clearly illustrates a significant escalation in rainfall from early to late in the year.
In January, Ko Si Chang experiences a comfortable humidity level of 59%, marking the end of the cooler season. This moderate humidity is ideal for enjoying the island's scenic views and outdoor activities. As the months progress into February and March, humidity slightly shifts, maintaining a steady range around 58% to 61%. However, as April approaches, there's a notable uptick, with humidity rising to 70%, signaling the onset of warmer temperatures. The trend continues into the summer months, peaking at a tropical 88% in August, as the island becomes enveloped in a humid embrace. This high humidity persists through September and October, before gradually tapering down to 78% in November and 70% by December, illustrating a clear seasonal shift. Overall, January serves as a sweet spot before the humidity rises sharply, catering perfectly to visitors seeking pleasant weather.
In January, Ko Si Chang, Thailand, experiences a UV Index of 10, categorized as very high with a brief burn time of just 15 minutes. This marks the beginning of a trend where the UV Index escalates dramatically in the following months. As winter gives way to spring, February sees a jump to an extreme index of 13, and this alarmingly high level remains consistent through March, April, and May, reaching its peak at 14. The extreme category continues throughout the summer months until September, when it slightly dips back to 13. As the year closes, the UV levels decrease once again to 10 in November and 9 in December, but January's positioning as very high hints that sun protection remains essential year-round. For detailed UV information throughout the year, explore Ko Si Chang UV Index.
UV Risk Categories
January in Ko Si Chang, Thailand, welcomes visitors with an impressive 252 hours of sunshine, setting the stage for a vibrant start to the year. As the months progress, the island experiences a steady increase in sunlight, with February offering 298 hours and March peaking at a delightful 336 hours. This upward trend continues until April, where it slightly dips to 321 hours but remains exceptionally bright. The sunny vibe persists through May and June, showcasing 322 hours and 305 hours respectively, before a gentle decrease in July and August, each boasting 287 hours. September and October bring further fluctuations, with hours varying between 267 and 284, while November and December regain strength, offering 298 and 317 hours of glorious sunshine. Overall, January serves as the perfect gateway into months filled with ample sunlight, making Ko Si Chang a captivating destination for sun-seekers.
In Ko Si Chang, Thailand, January shines with a 59% chance of sunny weather, making it one of the better months for sun-seekers. This is a sweet spot before the weather shifts dramatically in April, when the likelihood drops to a mere 18%. Interestingly, February offers even more sun, climbing to 75%, suggesting that the early part of the year is particularly bright. As the year progresses, however, the likelihood of sunny days dwindles, with months like August and September experiencing only a 10% chance of sunshine. This trend clearly illustrates that if you're hoping to bask in the sun, January, along with February, stands out as a prime time to visit.
In Ko Si Chang, Thailand, January welcomes visitors with a consistent daylight duration of 11 hours, setting the tone for the month. This pattern continues through February, maintaining that same 11-hour stretch. As the seasons shift, March marks a subtle transition, introducing an increase in daylight, which persists at 12 hours through to the end of August. The island enjoys this generous stretch of sunlight, perfect for outdoor activities and soaking up the tropical ambiance. Following this peak, daylight begins to dwindle again in September, reverting to 11 hours in October and sustaining that length through November and December. This cyclical pattern of light and shadow reflects the enchanting rhythm of life in this picturesque coastal destination.
In January, Ko Si Chang welcomes visitors with a pleasant average wind speed of 4.0 m/s (9 mph), setting the stage for a refreshing start to the year. This gentle breeze is characteristic of the month, transitioning into February's slightly calmer winds at 3.7 m/s (8 mph). As spring approaches, winds begin to pick up, peaking in June with an invigorating 4.8 m/s (11 mph), perfect for sailing and outdoor activities. The trend continues with consistently robust winds through July and August, but a noticeable decrease occurs by September, dipping to 3.4 m/s (8 mph). As the year draws to a close, winds fluctuate slightly, ending the year stronger in December at 4.4 m/s (10 mph). Overall, January sets a delightful tone, hinting at the vibrant winds that will follow in the upcoming months!
Weather in Ko Si Chang varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Ko Si Chang, focusing on differences in temperature, rainfall, humidity, and UV levels.
In January, the weather typically features a minimum temperature of 18°C (64°F) and a maximum of 31°C (89°F), with an average temperature around 27°C (81°F). The month sees about 24 mm (0.9 in) of precipitation over approximately 3 days, coupled with humidity levels around 59%. In contrast, February brings slightly warmer conditions, with minimum temperatures rising to 21°C (70°F) and a maximum of 32°C (89°F), while still maintaining an average of 27°C (82°F). Precipitation decreases to 19 mm (0.7 in) across 4 days, resulting in a humidity level of 58%. For a more detailed look at February weather, visit Ko Si Chang weather in February.
In comparing the weather between January and March, we see a noticeable increase in temperatures during March. The minimum temperature rises from 18°C (64°F) in January to 24°C (76°F) in March, while the average temperature slightly increases from 27°C (81°F) to 29°C (84°F). March also brings more precipitation, totaling 38 mm (1.5 in) over 7 days compared to January's 24 mm (0.9 in) over just 3 days. Humidity remains relatively similar, with March at 61% and January at 59%. For more detailed insights into the weather patterns, check out Ko Si Chang weather in March.
In January, the weather tends to be relatively mild with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 31°C (89°F), averaging around 27°C (81°F). This month experiences minimal precipitation, with only 24 mm (0.9 in) over just three days and a humidity level of 59%. In contrast, April is significantly warmer, with temperatures starting at a minimum of 22°C (71°F) and soaring to a maximum of 34°C (93°F), averaging 29°C (85°F). However, April also brings increased rainfall, accumulating 100 mm (3.9 in) over 14 days along with higher humidity at 70%. To explore more about the specific conditions in April, you can check Ko Si Chang weather in April.
In January, the weather is characterized by milder temperatures, with averages ranging from a minimum of 18°C (64°F) to a maximum of 31°C (89°F). The month receives relatively low precipitation, only about 24 mm (0.9 in) over just 3 days, and the humidity stands at a comfortable 59%.
In contrast, May experiences significantly warmer temperatures, with a minimum of 23°C (74°F) and a maximum of 34°C (93°F). However, it also sees a substantial increase in rainfall, accumulating around 160 mm (6.3 in) over 19 days, and the humidity rises to 80%. For more details on the weather during this month, you can check out Ko Si Chang weather in May.
In January, the weather is generally mild and dry, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 31°C (89°F) and an average of 27°C (81°F). The month experiences low precipitation, with only 24 mm (0.9 in) over approximately 3 days and humidity levels around 59%.
In contrast, June brings warmer temperatures with a minimum of 26°C (80°F) and a maximum reaching 32°C (90°F), averaging at 29°C (85°F). However, this month is significantly wetter, with 99 mm (3.9 in) of rainfall spread across 21 days and higher humidity at 85%. For a detailed look at weather patterns, visit Ko Si Chang weather in June.
When comparing the weather in January and July, noticeable differences emerge. In January, temperatures range from a mild minimum of 18°C (64°F) to a comfortable average of 27°C (81°F), with a maximum of 31°C (89°F). This month experiences relatively low precipitation of 24 mm (0.9 in) over just 3 days and a humidity level around 59%. In contrast, July sees warmer weather, with minimum temperatures starting at 26°C (79°F) and an average of 29°C (84°F), peaking at 32°C (90°F). The rainy season is in full swing during July, with significant precipitation of 134 mm (5.3 in) spread across 23 days, and humidity rises sharply to 86%. For more detailed insights on the July climate, check out Ko Si Chang weather in July.
In January, the weather in Ko Si Chang is pleasantly warm, with temperatures ranging from a minimum of 18°C (64°F) to a maximum of 31°C (89°F) and an average of 27°C (81°F). Precipitation is relatively low, with only 24 mm (0.9 in) falling over about 3 days, and humidity levels are around 59%. In contrast, August experiences much higher humidity at 88%, alongside increased precipitation totaling 138 mm (5.4 in) over 22 days. While the maximum temperature remains the same at 31°C (89°F), the minimum and average temperatures are notably warmer, starting at 26°C (79°F) and averaging at 29°C (84°F), contributing to a much more tropical feel. For more detailed information, you can visit Ko Si Chang weather in August.
In January, the weather is generally mild and pleasant, with average temperatures ranging from a minimum of 18°C (64°F) to a maximum of 31°C (89°F). The precipitation is relatively low, with only 24 mm (0.9 in) falling over about three days, and humidity levels sitting at a comfortable 59%. In contrast, September is characterized by much warmer temperatures, with minimums around 25°C (78°F) and maximums reaching up to 32°C (89°F). However, it also brings significantly higher rainfall, totaling about 250 mm (9.8 in) over 25 days, resulting in a much more humid environment with levels soaring to 87%. For more specifics on the weather in September, you can check Ko Si Chang weather in September.
In comparison to January, October experiences warmer temperatures, with average highs reaching 32°C (91°F) compared to January's maximum of 31°C (89°F). January offers a milder atmosphere with less humidity at 59%, while October's humidity rises to 83%. Additionally, January sees minimal rainfall, averaging only 24 mm across 3 days, whereas October is marked by heavy precipitation of 232 mm over 22 days, making it significantly wetter. For a detailed look at the weather specifics, check out Ko Si Chang weather in October.
In January, the weather is generally warmer with average temperatures ranging from a minimum of 18°C (64°F) to a maximum of 31°C (89°F) and lower humidity at 59%. The month sees minimal precipitation, with only about 24 mm (0.9 in) falling over just 3 days. In contrast, November experiences slightly cooler temperatures with averages from 23°C (74°F) to 33°C (91°F), higher humidity at 78%, and significantly more rainfall totaling 56 mm (2.2 in) over 11 days. This difference highlights how January offers drier and more temperate conditions compared to the wetter and more humid November. For more details about November weather, visit Ko Si Chang weather in November.
In comparing the weather between January and December, both months feature similar minimum temperatures of 18°C (64°F) and average temperatures around 27°C (81°F). However, January tends to have slightly lower maximum temperatures, averaging 31°C (89°F) compared to December's peak of 32°C (91°F). Additionally, January experiences less precipitation, with only 24 mm (0.9 in) over 3 days, whereas December sees a bit more rainfall at 28 mm (1.1 in) over the same number of days. Humidity levels are also slightly higher in December at 70%, compared to January's 59%. For a detailed look at conditions during December, you can refer to Ko Si Chang weather in December.
In January, Ko Si Chang experiences a delightful respite from the sweltering heat of the summer months, featuring pleasantly mild temperatures that allow visitors to explore the island comfortably. Unlike the oppressive humidity and heavy rainfall typical in other seasons, January boasts relatively low precipitation and moderate humidity levels, making it an ideal time for outdoor adventures. The atmospheric conditions encourage a refreshing escape, perfect for beach outings or exploring the island’s natural beauty. For a deeper dive into what the climate has to offer throughout the year, check out Ko Si Chang Climate.