Ko Lanta weather in May
May in Ko Lanta: hot, soaked, with clean air — fine if you can take 27 rainy days.
#8 of 12 months in Ko Lanta · #673 of 897 destinations to visit in May · comfort 73/100 (tier B)
Updated June 2026 · climate normals from ERA5 reanalysis
Traveller notes on Ko Lanta in May
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Ko Lanta climate normals — May
| Daytime high | 29°C / 85°F | 🥵 hot |
|---|---|---|
| Nighttime low | 26°C / 79°F | |
| Rainfall | 268 mm / 10.6 in | ⛈ soaked |
| Rainy days | 27 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 9.5 h/day | |
| Daylight | 12.5 h | |
| Wind | 13 km/h / 8 mph | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Ko Lanta in May — FAQ
- Is May a good time to visit Ko Lanta?
- May in Ko Lanta: hot, soaked, with clean air — fine if you can take 27 rainy days. It ranks #8 of 12 months for Ko Lanta on SeasonMap's comfort score (73/100).
- What is the weather like in Ko Lanta in May?
- In May, Ko Lanta averages a daily high of 29.4°C and a low of 26°C, with about 268.2 mm of rain over roughly 26.8 rainy days.
- What is the air quality in Ko Lanta in May?
- Ko Lanta has a mean US Air Quality Index of about 35 in May.