Ko Lanta weather in December
December in Ko Lanta: warm, rainy, with clean air — an excellent time to visit.
#5 of 12 months in Ko Lanta · #242 of 897 destinations to visit in December · comfort 82/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Ko Lanta in December
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Ko Lanta climate normals — December
| Daytime high | 29°C / 83°F | 🌤 warm |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Rainfall | 113 mm / 4.4 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 81% | 💦 very humid |
| Dew point | 23°C / 73°F | |
| Sunshine | 9.2 h/day | |
| Daylight | 11.7 h | |
| Wind | 15 km/h / 9 mph | |
| Air quality (US AQI) | 36 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Ko Lanta in December — FAQ
- Is December a good time to visit Ko Lanta?
- December in Ko Lanta: warm, rainy, with clean air — an excellent time to visit. It ranks #5 of 12 months for Ko Lanta on SeasonMap's comfort score (82/100).
- What is the weather like in Ko Lanta in December?
- In December, Ko Lanta averages a daily high of 28.5°C and a low of 24.2°C, with about 112.8 mm of rain over roughly 11 rainy days.
- What is the air quality in Ko Lanta in December?
- Ko Lanta has a mean US Air Quality Index of about 36 in December.