Koh Samet Weather in December
December is one of the perfect months to visit Koh Samet, with daytime temperatures of 31°C (88°F) and lows of 25°C (77°F) at night. It is also the driest month of the year.
Rainfall in Koh Samet in December
You can expect the least amount of rain of the year this month, making it perfect for outdoor events and activities. Expect around a single day of rain based on historical data, with 16 mm (0.6 in) average. Any rain that does arrive tends to come in a single sharp spell rather than prolonged drizzle.
Temperature in Koh Samet in December
Koh Samet has perfect weather in December, with days reaching 31°C (88°F) and nights cooling to 25°C (77°F). If you're spending a lot of time outdoors, it helps to plan around the warmer part of the day. With lows around 25°C (77°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Koh Samet in December
The month enjoys around 230 hours of sunshine, creating mostly sunny days with good weather conditions.Our weather planner can help you find worldwide destinations with pleasant weather during this period. January, February and December typically offer the best weather for Koh Samet.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Koh Samet's climate page.
Koh Samet Temperature in December
Min Temperature
25°C (77°F)
Max Temperature
31°C (88°F)
Chance of Rain
4%
Precipitation
16 mm (0.6 in)
Rainy days
a single day
Humidity
71% *
Sunshine
230 hours *
Percentage Sunshine
*
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Koh Samet typically stay consistent throughout December, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 22°C (72°F).
Average temperatures in December
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather for Koh Samet in December
Browse day-by-day weather records for Koh Samet spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Koh Samet historical weather extremes in December
Based on weather observations in Koh Samet between 1976 and 2025, these are the recorded extremes during December.
- Koh Samet recorded its highest December temperature of 38°C (100°F) on December 4, 1995.
- The lowest daytime temperature in December was 20°C (68°F), recorded on December 25, 1992.
- Koh Samet registered its coldest December night on December 5, 1989, with temperatures dropping to 10°C (50°F).
Best Places in Thailand in December
Find out more about the weather in Thailand and which places have the best travel conditions in this month. See all of Thailand in December →
perfect weather
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unpleasant
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What to Wear in Koh Samet in December
Warm weather calls for comfortable, breathable clothing in December. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Almost no rain is expected, so no need to bring rain gear. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in Koh Samet in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Thailand, check out our Koh Samet's climate page.
Temperature Rainfall Sunshine Humidity
See the full Koh Samet climate overview or explore weather in Thailand.
