Nepal’s weather is generally predictable and pleasant.The climate is varied ranging from the sub-tropical Terai to the cool dry temperate and alpine climates in the northern Himalayan ranges. The Terai is the hottest part of the country, summer temperature may rise as high as 40ºc and is hot and humid. In the mid mountain regions, the summer is mild with temperature around 25º-27ºc.
Nepal experience 4 seasons - spring (Mar-May), summer (Jun.-Aug.), autumn (Sept.-Nov.) and winter (Dec.-Feb.). The winter temperature range from 7ºc to 23ºc in the Terai and sub-zero to 12ºc in the mountain regions and valleys. The northern Himalayan region has a frigid climate. The valley of Kathmandu has a pleasant climate with an average summer temperature of 19º-27ºc and winter temperature of 2º-12ºc respectively.

Rainfall is extensive during the south-west monsoon period from June to August with the eastern part receiving the maximum rainfall. In the winter season, the western part receives a larger portion of rainfall. The period from October to May is generally dry in most parts of the country.