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November through February is the cool dry season, ideal for exploring Vat Phou's sandstone galleries and the surrounding 4000 Islands (Si Phan Don) river archipelago to the south. Sunset on the Mekong from a bungalow on Don Det or Don Khon, freshwater Irrawaddy dolphins (critically endangered), and Khone Phapheng waterfall (Southeast Asia's largest by volume) are nearby highlights. The Vat Phou festival (full moon of the third lunar month, usually February) is the year's headline event.
Wet season (June to October) brings heavy rain and humidity. Vat Phou trails become slick. Tourist infrastructure is basic. UXO (unexploded ordnance) from the Vietnam War remains in some rural areas, stay on marked trails. Malaria prophylaxis recommended. In Champasak, set the route only after checking opening days and distances. A day in Champasak is easier when one backup sits close to the main route.
Current conditions and the practical reference material that helps turn the saved places into a trip.
7-day forecast from Open-Meteo. UV badges flag days when sun protection matters (3 and above is moderate; 8 and above is risk territory for unprotected fair skin within 30 minutes).
About 84% of the year's rain falls in these months. Typical highs around 30°C, lows around 24°C.
About 34mm of rain a month, against 248mm in the wet season.
Champasak or Muang Champassak is a small town in southern Laos, on the west bank of the Mekong River about 40 km south of Pakse, the capital of Champasak Province. It is the seat of the Champasak district (muang).
The links below support the changing or licensed reference material on this page. Personal notes and ordinary geographic facts are not footnoted individually.
Monthly highs, lows, rainfall — long-term averages, NASA POWER.
Maps, image licenses, and the full dataset registry are listed in site credits.