The month in detail
What to expect in December
In December, Koh Lanta sees 30°C during the day with 7.0h of sunshine per day. Rain risk remains low (24% of days), leaving good room for outdoor activities. Not the best window, but acceptable if dates are constrained. January (5.8/10) is significantly better if possible.
December ranks 3 out of 12 months in Koh Lanta. Compared to November: 27 pts fewer rainy days, +2.2h of sun per day.
This month's conditions
What it's like in December
UV index
7 · high
sunscreen and hat advised
Feels like
very humid
23°
Sea
29°C
warm, ideal
Daylight
11.6h of daylight
Air quality
good
AQI 30
Compare
Is December the right month?
The best month in Koh Lanta is January (5.8/10), 0.3 pt higher than December.
Book
Plan your trip
Hotels at their lowest outside peak season, highest on comfortable months. Shoulder seasons offer a good price/climate compromise.
Stay
Hotels & rentals · Koh Lanta
Expedia →
Activities
Tours, tickets, experiences
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Flights
Multi-airline comparator
Kiwi →
🎟️ Activities & tours · Koh Lanta
GetYourGuide selection · free cancellation
Practical info
What you need to know before you go
Three angles: the country (language, currency, safety, budget), the year-round climate, and the specifics of a tropical stay.
Country · Thailand
🗣️LanguageThai
💶CurrencyThai Baht (฿)
🚗DrivingLeft-hand
🛡️Safety ⓘSafe · 2/5
💰Cost of living ⓘCheap · 2/5
🌡️ Climate
🌍Climate typeEquatorial tropical
📈Climate trend ⓘStable
🔥Hottest monthFebruary · 32°C
❄️Coolest monthAugust · 29°C
🌧️Rainiest month ⓘOctober · 54%
🏝️ Tropical stay
🌞Dry season ⓘMay → Sep
🌧️Wet season ⓘDec → Mar
🌀Cyclones ⓘNone (equator)
Explore
Other destinations in December
If December doesn't convince you for this destination, compare with others.
Location
Where is Koh Lanta ?
Global position + regional geographic context.
🌍 World
🔍 Geographic context
ThailandEquatorial tropical climate with a 5.8 → 4.8 gap between best and worst month. 10 years of ERA5 data to choose by project.
7.53°N · 99.04°E
Questions
Frequently asked questions
What is the best time to visit Koh Lanta?
January is the best month with 31.0°C highs, 25.0°C lows, 7.6h of sunshine and 16.0% rainy days.
How many hours of sunshine does Koh Lanta get in January?
Koh Lanta averages 7.6 sunshine hours per day in January. It is the sunniest month with a climate score of 5.6/10.
What is the rainiest month in Koh Lanta?
May is the most unfavourable month with May has the lowest climate score of the year and the lowest climate score of the year.
What are the temperatures at night in Koh Lanta in January?
In January, overnight lows reach 25.0°C, while afternoon highs average 31.0°C.
Is Koh Lanta good in winter?
In winter (December-February), Koh Lanta scores 5.5/10 on average — Decent period conditions for cultural visits.. The best month overall remains January with a score of 5.6/10.
When should you avoid Koh Lanta?
May is the most difficult month to visit Koh Lanta, with May has the lowest climate score of the year. Climate conditions are at their lowest of the year during this period.
Can you swim in Koh Lanta in December?
In December, the sea averages 29°C in Koh Lanta: warm, ideal. Ideal conditions for swimming and snorkeling.
Do you need sun protection in Koh Lanta in December?
The average UV index reaches 7 in December in Koh Lanta (high), with about 11.6h of daylight. Sunscreen and hat advised.