USA- The seasons in Nepal are pretty much the same as in Europe, opposite of the Australian seasons. In January ia month of coldness, while in July you could make do with shorts and T-shirt. Normally the climate of Nepal is the winters are dry and the summers are hot. But climate of Nepal differs considerably throughout the country due to the high range in altitude and landscape.
Summer, monsoon and late spring temperatures range from 28ºC (83ºF) in the hill regions to more than 40ºC (104ºF) in the Terai (southern plains). In winter, average maximum and minimum temperatures in the Terai range from a brisk 7ºC (45ºF) to a mild 23ºC (74ºF).
The Kathmandu Valley, 4,297ft (1,310m). is running with a mild climate most of the year. Summer temperatures range from 67-81°F (19-27°C), and in winter temperatures are between 36 and 68°F (2-20°C). In the period of mansoon season between June and August, there is an average rainfall of between 7.8-14.7 inches (200-375mm) in Kathmandu.
May and June is months of 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 and November to February are dry and very cold at night time.