The temperature in Bhutan varies as we travel from the lower altitudes in the south to the high Himalayan regions to the north. The southern border areas are the hottest and humid. Temperature goes above 30 °C in summer (mid May to August) and in winter (December to February) it dips to approximately 15 °C. Northern regions experience severe winters and mild summers (average temperatures vary from 0 °C to 10 °C) with snowfall in areas bordering Tibet. In the central part of Bhutan, a temperate climate is experienced throughout the year.
Autumn (from late September to November) is the appropriate time to visit Bhutan. The weather at this time is suitable for trekking and sightseeing tour as there is a lot of sunshine and no rain. This is the best time to observe many traditional festivals in several places.. Spring (from March to May), when the kingdom looks at its vibrant best, is another popular season for traveling. Forests are adorned with flowers in full bloom and the weather is pleasant.
Rain falls any time of the year in Bhutan, especially in the monsoon season (from June to September) which coincides with summer season. Humidity is always high especially in the southern regions and floods and landslides are common.