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Lamai Beach Weather in December
In Lamai Beach, December brings high daytime temperatures around 29°C (84°F), with nights cooling to 26°C (79°F). Expect quite a bit of rainfall this month.
Rainfall in Lamai Beach in December
Analyzing past climate data, one can expect approximately 14 days of rain, averaging 157 mm (6.2 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Lamai Beach in December
December in Lamai Beach brings typical temperatures with highs around 29°C (84°F) and lows of 26°C (79°F). Overall, the month follows a fairly predictable daily temperature pattern. With overnight lows of 26°C (79°F), nights stay very warm. Air conditioning makes a real difference if you're sensitive to heat. A cold shower before bed can also help you get to sleep more comfortably.
Sunshine in Lamai Beach in December
The month experiences a moderate amount of sunlight, with 177 hours of sunshine. This provides a nice balance between sunshine and clouds.
Average water temperature in December
The water reaches 29°C (84°F) this month. It's on the warm side, which suits people who prefer that, but don't expect a cooling dip if the air temperature is also high.If your ideal day consists of dry skies and pleasant temperatures, January and February typically offer the best circumstances for Lamai Beach.
Lamai Beach Temperature in December
Min Temperature
26°C (79°F)
Max Temperature
29°C (84°F)
Water Temperature
29°C (84°F) *
Chance of Rain
47%
Precipitation
157 mm (6.2 in)
Rainy days
14 days
Humidity
82% *
Sunshine
177 hours *
Percentage Sunshine
*
* Data from: Koh Samui, Thailand (14 KM, 8 Miles).
Lamai Beach Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Lamai Beach - and find the best time to visit.
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Lamai Beach typically stay consistent throughout December, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in December
Daily Historical Precipitation
48-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in December
Historical weather records for Lamai Beach in December
Browse day-by-day weather records for Lamai Beach spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Lamai Beach historical weather extremes in December
Based on weather observations in Lamai Beach between 1986 and 2025, these are the recorded extremes during December.
- The warmest day in December was on December 11, 2023, with a maximum of 34°C (93°F).
- The coldest December day was on December 25, 1999, with a maximum of 24°C (75°F).
- Lamai Beach registered its coldest December night on December 21, 1999, with temperatures dropping to 20°C (68°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
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Lamai Beach 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). Also bring a poncho, it will rain a lot! Waterproof everything you can. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. Bring sunglasses since you'll have some sunny periods throughout the month
What To Do in Lamai Beach in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming7/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Lamai Beach 3-Day Forecast
More climate data for Lamai Beach
Temperature Rainfall Sunshine Humidity Water Temp
See the full Lamai Beach climate overview or explore weather in Thailand.
Popular in December
Where to go in December - average daytime high across popular destinations.
Bangkok
33°C (91°F) Jomtien Beach
31°C (88°F) Ao Nang Beach
30°C (86°F) Hua Hin30°C (86°F) Chiang Mai30°C (86°F) Ko Lanta30°C (86°F) Patong Beach29°C (84°F) Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
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