Climatic conditions vary from one place to another in accordance with the geographical features. Nepal has five climatic zones, broadly corresponding to the altitudes.The tropical and subtropical zones lie below 1,200 meters (3,937 ft), the temperate zone 1,200 to 2,400 meters (3,937 to 7,874 ft), the cold zone 2,400 to 3,600 meters (7,874 to 11,811 ft), the subarctic zone 3,600 to 4,400 meters (11,811 to 14,436 ft), and the Arctic zone above 4,400 meters (14,436 ft). Nepal has namely five major seasons: spring, summer, monsoon, autumn and winter. In the north, summers are cool and winters severe, while in south, summers are tropical and winters are mild. An average temperature drop of 6°C and occurs for 1,000 m gain in altitude.
In Terai, summer temperatures exceed 37°C and higher in some areas, winter temperatures range from 7°C to 23°C in the Terai. In mountainous regions, hills and valleys, summers are temperate while winter temperatures can plummet under sub zero. The valley of Kathmandu has a pleasant climate with average summer and winter temperatures of 19°C – 35°C and 2°C – 12°C respectively.
The average annual rainfall is 1,600 mm, but it varies by Eco-climatic zones, such as 3,345 mm in Pokhara and below 300 mm in Mustang.
In Terai, summer temperatures exceed 37°C and higher in some areas, winter temperatures range from 7°C to 23°C in the Terai. In mountainous regions, hills and valleys, summers are temperate while winter temperatures can plummet under sub zero. The valley of Kathmandu has a pleasant climate with average summer and winter temperatures of 19°C – 35°C and 2°C – 12°C respectively.
The average annual rainfall is 1,600 mm, but it varies by Eco-climatic zones, such as 3,345 mm in Pokhara and below 300 mm in Mustang.