July is one of the wettest months of the year in Laos, although showers tend to be short and intense, lasting for a few hours rather than all-day downpours, and plenty of dry days can still be expected. In Pakse and the south, rainfall can be heavier and last longer, which means the waterfalls in the 4000 Islands are at their best. The countryside around Vang Vieng is also particularly lush and green at this time, although the wet weather can make caving and rock-climbing difficult. In the more remote regions, such as Phongsali and Muang Sing the heavy rain can make travelling problematic, as tracks may become unpassable.
Despite overcast skies, average temperatures in Luang Prabang and Vientiane hover around 25-27°C and humidity levels remain around 80%.