One of the most popular things tour guides never miss to mention is, ‘In Nepal, you can experience all the climatic conditions of the world." However absurd that may sound, it is almost true. While Nepal is a landlocked country, coastal conditions can be a rare find. The same goes for Hot deserts, but we arguably have cold ones.
With that note, thanks to its various altitudes ranging from the Terai Plains (60m) to the Highest place on earth, Mount Everest (8848m), Nepal experiences a wide range of climatic conditions.
Here are some climatic conditions
Tropical Lowland Terai (Southern Region):
The Terai region experiences scorching temperatures during summer, often soaring as high as 40°C (104°F). Winters are comparatively milder, with temperatures averaging around 15-25°C (59-77°F).
The monsoon season brings heavy rainfall, which is crucial for the region's agriculture. Annual precipitation can exceed 2,500 mm, fostering lush greenery.
Dense subtropical forests in the region are home to diverse flora and fauna, including endangered species such as the Bengal tiger and one-horned rhinoceros.
Hill Region:
The region experiences moderate temperatures throughout the year, with the temperature ranging from 5-25°C (41-77°F). Winters can be cold, especially at higher elevations. The hills receive rainfall from winter rains and the monsoon, resulting in a double impact. The terraced landscapes showcase a patchwork of agricultural practices.
The region has varied vegetation, ranging from subtropical deciduous forests to coniferous forests at higher elevations. Terraced fields dominate the mid-hills, reflecting traditional farming practices.
Mountain Region (including the Himalayas):
Temperature: Decreasing with altitude, temperatures in the mountains can range from mild to extreme. High-altitude areas experience sub-zero temperatures, especially in winter.
Rainfall: The rain-shadow effect influences precipitation, resulting in drier conditions in some areas. Winter snowfall contributes to the iconic snow-covered peaks.
Vegetation: Alpine vegetation gives way to barren landscapes as altitude increases. Unique flora, such as rhododendrons, thrive in the higher reaches.
Trans-Himalayan Region (Northern Region):
The region experiences harsh winters with temperatures dropping well below freezing, often reaching -20 °C (- 4°F). Summers are brief, and temperatures can go up to approximately 15-20°C (59-68°F).
Precipitation is extremely low, resulting in arid and desert-like conditions. The main sources of water are glacial-fed rivers. Vegetation is sparse and adapted to arid climates, with hardy plants such as juniper and wild roses being prominent.
The best time to visit Nepal in its entirety runs from November to February, to avoid the summer monsoon but also the heat of the plains, which is intense from March to October.
Other helpful guides and informations

Introduction to Nepal
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Guide to Choosing Trekking Company in Nepal
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