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Laos has a tropical monsoon climate, with a rainy season from May to October, a cool dry season from November to February, and finally a hot dry season in March and April. Rainfall varies regionally, Vientiane, the capital receives about 1,700 millimeters, and Luang Prabang receives about 1,360 millimeters annually. The highest amounts -3,700 millimeters annually – were recorded in Champasak Province. Southern Laos is the best to be avoided during the hot dry season (March and April) when day-time temperatures range from highs around 40°C and nights aren’t much cooler. However, the mountainous northern provinces are not bad during the hot dry season and the early rainy season (June). Note that the mountainous areas can be cold in January, with a minimum of 5°C.