The weather in Koh Lanta in December is very hot. The average temperatures are between 78°F and 84°F, drinking water regularly is advisable.
You can expect rain for roughly half of the month of December in Koh Lanta. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Koh Lanta in December 2025.
If you’re planning to visit Koh Lanta in the near future, we highly recommend that you review the 14 day weather forecast for Koh Lanta before you arrive.
Temperatures
84° / 78°
Rainy Days
11
Snowy Days
0
Dry Days
20
Rainfall
9.06
in
Sun Hours
11.1
Hrs
