Weather conditions are ideal for visiting bhutan in all seasons except winter, which runs from December through February. Summer temperatures in the south are tropical with high monsoon rainfall. Rainfall in the higher central region is not so heavy. The days are clear and warm with cool nights. Western Bhutan is particularly affected by monsoons that bring between 60 and 90 percent of the region's rainfall.
The Spring in the higher valleys (mid-March to May) has warm days (20 °C) and cool nights. June marks the beginning of summer when day temperatures warm up to 27 - 29 °C. By July, the rainy season starts and continue till mid-September. Autumn, from late September or early October to late November, follows the rainy season. It is characterized by bright, sunny days and some early snowfalls at higher elevations. The autumn months of September to November are ideal for trekking with clear skies and mild weather. In December temperatures fall, but the days are warm and the clear, azure winter skies serve a striking background to the snow-capped peaks. On a sunny day, temperatures reach about 16-18 ° C. The nights, however, are cold with temperatures falling below freezing.
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