Nepal's weather is generally predictable and pleasant. There are four climatic seasons: March to May (spring), June to August (summer), September to November (autumn) and December to February (winter). The monsoon is approximately from the end of June to the middle of September. About 80% of the rain falls during that period, so the remainder of the year is dry. Spring and autumn are the most pleasant seasons; winter temperatures drop to freezing with a high level of snowfall in the mountains. Summer and late spring temperatures range from 28ºC (83ºF) in the hill regions to more than 40ºC (104ºF) in the Terai. In winter, average maximum and minimum temperatures in the Terai range from a brisk 7ºC (45ºF) to a mild 23ºC (74ºF). The central valleys experience a minimum temperature often falling bellow freezing point and a chilly 12ºC (54ºF) maximum. Much colder temperatures prevail at higher elevations. The Kathmandu Valley, at an altitude of 1,310m (4,297ft), has a mild climate, ranging from 19-27ºC (67-81ºF) in summer, and 2-20ºC (36-68ºF) in winter.

In Valley

The Kathmandu Valley has a mild climate most of the year, situated at an altitude of 4,297ft (1,310m). Summer temperatures range from 67-81°F (19-27°C), and in winter temperatures are between 36 and 68°F (2-20°C). During the rainy monsoon season between June and August, there is an average rainfall of between 7.8-14.7 inches (200-375mm) in Kathmandu. May and June can be very hot and humid until the monsoon rains bring relief. In spring (March to April) and autumn (October to November) the temperatures are pleasant with occasional short bursts of rain, while November to February are dry, but can be very cold, especially at night.