Vientiane experiences a tropical savanna climate with distinct wet and dry seasons that dictate the rhythm of daily life and wardrobe decisions.

The wet season brings heavy afternoon downpours and thunderstorms that can drench you in minutes, making water-resistant layers and quick-dry fabrics essential rather than optional.

Temperatures hover between 15°C and 35°C throughout the year, with March and April reaching scorching highs before the rains arrive to provide relief.

Humidity remains high year-round but becomes particularly oppressive during the wet months, when even minimal exertion leaves clothes clinging uncomfortably.

The city's position along the Mekong means evening breezes provide some respite, though a light scarf remains useful for over-air-conditioned restaurants and temples that require covered shoulders.