The Laos climate is mainly tropical, with a seasonal monsoon and this means the weather is warm, humid and there is a lot of rain in the wet season.
The average temperature is around 29°C (84°F). During the warmest months the temperature can rise to 40°C (100°F+). In cooler months the temperature often drops to 15-20°C (58-68°F) at night in lower land like Vientiane and it can drop to below freezing in the mountainous areas. Days are usually warm and sunny almost all year round.