Koh Lanta · Month comparison
September vs February
February ranks #3 overall vs September at #12. The driest and sunniest month of the year — and the most expensive.
September
#12 of 12 months
Avoid
The wettest month of the year at 260mm — hard cap forces a weather score of 2.
- ↑Cheapest possible prices on accommodation — almost nothing left open to charge for
- ↑Waterfalls in the Mu Koh Lanta national park reach their peak flow
February
#3 of 12 months
Best match
The driest and sunniest month of the year — and the most expensive.
- ↑20mm rainfall and 9.5 hours of daily sunshine: the most reliably perfect weather of the year
- ↑Lowest humidity at 68% — warm but not oppressive even at 33°C
| Factor | September | February |
|---|---|---|
| Weather score | 2 | 10 |
| Value score | 9 | 3 |
| Crowd score | 9 | 4 |
| Events score | 3 | 5 |
| Atmosphere | 4 | 9 |
| Avg high temp | 30°C | 33°C |
| Monthly rain | 260mm | 20mm |
| Daily sunshine | 4.5hrs | 9.5hrs |
September trade-offs
- ↓260mm exceeds 250mm: the absolute worst weather cap — this is a mandatory avoid for any weather-sensitive trip
- ↓Road flooding common — access to the southern national park unreliable
- ↓Essentially every business on the island is closed: this is genuine ghost-town mode
February trade-offs
- ↓Peak prices across the island — Kantiang Bay boutique resorts at annual high rates
- ↓Liveaboard diving demand exceeds supply: whale shark trips need months of advance booking
- ↓Busiest stretch of the year on Long Beach Khlong Dao
Scores compare months within Koh Lanta. Climate data: Open Meteo ERA5 30-year normals (1991–2020). Methodology →