SeasonMapKhao Sok (Khao Sok National Park) weather in September
Thailand
September in Khao Sok: sweltering, soaked, with clean air — a gamble, with 27 rainy days.
#10 of 12 months in Khao Sok · #1241 of 1383 destinations to visit in September · comfort 50/100 (tier D)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Khao Sok in September
Other months in Khao Sok
Khao Sok's forum calls December squarely in the dry season, which runs through to April — regulars staying in the park's treehouses report warm days in the high 20s to low 30s°C and mild nights in the low-to-mid 20s. It's a genuinely humid rainforest even in the drier months, so don't expect crisp, dry air — just a lot less rain than the wet season that runs mid-April to early December.
Add your own note from Khao Sok's card on the map.
Khao Sok climate normals — September
| Daytime high | 29°C / 84°F | 🔥 sweltering |
|---|---|---|
| Nighttime low | 24°C / 75°F | |
| Feels like (high) | 35°C / 95°F | |
| Sea temperature | 30°C / 86°F | ♨️ bath-warm |
| Rainfall | 349 mm / 13.7 in | ⛈ soaked |
| Rainy days | 27 days | |
| Humidity | 91% | 💦 very humid |
| Dew point | 24°C / 76°F | |
| Sunshine | 6.8 h/day | |
| Daylight | 12.2 h | |
| Wind | 12 km/h / 8 mph | |
| Air quality (US AQI) | 24 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Khao Sok in September
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Quietschool holidays in 3 of the markets that fill it, one of its worst months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Khao Sok's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Toughest weatherKhao Sok's weather peaks December–February, best around January.
Best weatherFair weatherToughest weather
What's on in Khao Sok in September
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Southwest monsoon
1 May – 30 Sep · usuallyThis is one of the wettest patches of forest in the country and it shows: afternoon storms, cloud on the limestone all morning, and trails that turn to clay. The lake looks its best in it.
- Season
Wet season
MonsoonRisk27 rainy days and about 349 mm in the month — the real kind of rainy season, not afternoon showers.
from the climate normals
Nearby, and something's on
Within 300 km of Khao Sok — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Khao Sok?
Khao Sok in September — FAQ
- Is September a good time to visit Khao Sok?
- September in Khao Sok: sweltering, soaked, with clean air — a gamble, with 27 rainy days. It ranks #10 of 12 months for Khao Sok on SeasonMap's comfort score (50/100).
- What is the weather like in Khao Sok in September?
- In September, Khao Sok averages a daily high of 28.8°C and a low of 23.9°C, with about 348.5 mm of rain over roughly 27.2 rainy days.
- What is the air quality in Khao Sok in September?
- Khao Sok has a mean US Air Quality Index of about 24 in September.
Other months in Khao Sok
Compare Khao Sok in September
Warmer or cooler than Khao Sok in September
Similar destinations in Southeast Asia — September
Within 300 km: Ko Tao's Clear water, dive season around 1 Feb – 30 Sep, and Ko Pha Ngan's Full Moon Party on 1 Jan – 31 Dec.