December · Thailand
Best time to visit Koh Lanta in December Weather, crowds & prices
Weather in Koh Lanta in December
Average temperature 26°C, 170 mm of rain, about 13 days with 6+ hours of sunshine and 89% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
December score
5.7/10
Ranked #10 of 12 months
- Avg temp
- 26°C
- Rainfall
- 170 mm
- Humidity
- 89%
- Days with 6h+ sun
- 13
- Crowd Density
- Quiet / Uncrowded
- Average Expenses
- $$ · Moderate Cost ($$)
December in Koh Lanta scores 5.7/10 for beach and coastal travel - ranked #10 of 12. Expect around 26°C, 170 mm of rain, and roughly 13 days with 6+ hours of sunshine this month.
Koh Lanta's quiet beaches and long sunsets suit families and travellers avoiding the crowds.
December in Koh Lanta: mixed conditions, plan around the weather
Days in December average 26°C (79°F) and humidity near 89% — front-load outdoor plans before the heat builds and treat the middle of the day as indoor time.
170 mm of rain signals a properly wet month, with only about 13 days with 6+ hours of sunshine to count on — build indoor options into the schedule.
That is 5.7/10 on the same scale — 10th of 12 months, versus 8.7/10 for the best month here.
Pack the lightest breathable clothing you own, a hat, and more water than feels necessary, a proper rain shell rather than an umbrella.
Budget for mid-season pricing, and crowds are light for this destination.
If your dates are flexible, February is materially better in Koh Lanta — 3 points higher on the same scale.
Frequently asked
- What is the weather like in Koh Lanta in December?
- In December, Koh Lanta averages 26°C, 170 mm of rain, and about 13 days with 6+ hours of sunshine. Its climate-comfort score is 5.7/10.
- Is December a good time to visit Koh Lanta?
- December earns a 5.7/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Koh Lanta in December?
- Expect about 170 mm of rain in December. Average humidity is 89% and there are about 13 days with 6+ hours of sunshine.
Curated in Koh Lanta
Tickets & experiences
Things to do in Koh Lanta
Koh Lanta, Thailand. Live activities and tours from GetYourGuide, matched to this destination.