Monsoon Climate in Nepal : Facts & Information

Find here some facts and information about the Monsoon Climate in Nepal. There are three regions in Nepal accordingly to geographical factors. So, those three regions also a major factors for the monsoon climate of Nepal. We are here with facts and information about Monsoon Climate in Nepal or monsoon weather in Nepal.

The Monsoon climate in Nepal

Asia has all types of landforms, climates and natural that are found in the world. The   central   part   of   Asia   is the northern part of Asia has extensive plain land known as Siberian plains. The plain land is drained by important rivers like Ob, Yenesi and Lena. These rivers drain into the Arctic Ocean. occupied by lofty mountains and plateaus. Here lies the highest mountain peak of the world, Mt Everest (Sagarmatha), 8,848m. There is also the highest plateau of the world known as Pamir Knot ft is also called the Roof of the World. Most of the mountain ranges have their origin in the Pamir Knot.

The southern part of Asia has three important plateaus. They are a plateau of Arabia, the Deccan plateau of India and the plateau of Yunnan in China.

The climate of Asia is influenced by various factors like latitude, altitude, landforms and wind directron. Asia has all types of climate from extremely hot to freezing cold. The southern part of Asia is very close to the equator. It is very hot and wet throughout the year. The countries like Malaysia, Singapore and Indonesia have such climate.

Nepal has tremendous diversity in landform. climate and natural vegetation. The climate of Nepal varies with its topography. The climate of mountain region is cold, dry and windy. There is snow almost all the time. The climate of the hilly region is moderate. It is neither too hot nor too cold all the year round. As Terai region is flat and lies in the southern part of the country, it has the hot and humid climate.

Nepal experiences four seasons. They are Spring Season (March – May), Summer Season (June- August), Autumn Season (September- November) and Winter Season (December- February).

It rains during the summer season by the monsoon wind blowing from the Bay of Bengal. It rains very little in winter. Winter is generally dry and windy.

Monsoon climate is the result of monsoon wind or seasonal wind. The wind changes its direction according to the season. So it is hot and wet in summer and cold and dry in the winter season. Countries like Nepal, India, Bhutan, Bangladesh, and Pakistan have such climate.

The climate of Nepal is a tropical monsoon, except for parts of the north of the country, which are in the rain shadow of the Himalayas, have a cold semi-desert climate. In every summer, south Asia and especially Nepal, Bangladesh and India, is drenched by rain that comes from moist air masses that moves from the Indian Ocean to the south. These rains and the air masses that bring them are known as monsoons. The term monsoon refers not only to the summer rains but to the entire cycle that consists of both summer moist onshore winds and rain from the south as well as the offshore dry winter winds that blow from the north Asia (Siberia) to the Indian Ocean. The Arabic word for season, Mausam, is the origin of the word monsoon due to their annual appearance. Although the precise cause of the monsoons is not fully understood, but air pressure is one of the primary factors. In the summer, a high-pressure zone lies over the Indian Ocean while a low-pressure zone exists over the Asian continent. The air masses move from the high pressure over the ocean to the low pressure over the continent, bringing moisture-laden vapour to south Asia. Conversely, during winter a low pressure develops over the Indian Ocean while a high pressure lies over the Tibetan plateau and so cold air flows down the Himalaya and south to the ocean. These weather fronts between warm air and cold air generally produce relatively dense cloud and such cloud covers the lowland area (like Terai) for many days. The migration of trade winds and westerlies also contribute to the monsoons.

Monsoon climate nepal

Small scale monsoon also takes place in equatorial Africa, north Australia, and, to a lesser extent, in the south-west USA.

The wet monsoon, which begins in June, is especially important to India, Nepal, Bangladesh, and Myanmar. They are responsible for almost 90 percent of south Asian water supply. Usually, the rainfall occurs until last of September.

  • See Also: Monsoon climate in Nepal Himalayas
  • See Also: Monsoon climate in Nepal Mountains
  • See Also: Monsoon climate in Nepal Hills
  • See Also: Monsoon climate in Nepal Terai Madhesh

The monsoon enters in Nepal during the first week of June and it brings abundant rain until September. The duration of the monsoon and amount of rain varies across Nepal. The western one-third of the country is drier than the east. Monsoon depressions move from south-east to north-west, on average at the rate of two per month, bringing heavier bursts of rain. The monsoon is longest and wettest in the eastern part of the country like Ham, Dhankuta, Taplejung, etc. Conversely, winter monsoon due to the frontal system generates more concentrated rainfalls in the western part of Nepal and very few in the eastern part. These rainfalls can provide up to one-fifth of the annual total rainfall. Similarly, heavy rainfall in November and December is rare. The Nepalese climate, therefore, shows a very marked dry season lasting from mid-October until May and during this period, many locations experience severe drought.

The measured values of mean annual precipitation in the Nepal range from approximately 250 mm at the area to the north of the Himalaya (like Jomsom) to many areas exceeding 6,000 mm. The annual rainfall in Kathmandu generally exceeds 1350 mm. The mean annual rainfall varying between 1500 mm and 2500 mm predominate over most of the country. In Nepal, the daily distribution of precipitation during the rainy season is also uneven. Sometimes 10 % of the total annual precipitation can occur in a single day. Similarly, 50% total annual rainfall also can occur within 10 days of summer. This type of uneven distribution plays an important role in triggering landslides in many parts of Nepal.

So, if you want to visit Nepal or travelling in Nepal, then must know above facts and information about Monsoon Climate in Nepal or Monsoon weather in Nepal.


Jitendra Sahayogee

I am Jitendra Sahayogee, a writer of 12 Nepali literature books, film director of Maithili film & Nepali short movies, photographer, founder of the media house, designer of some websites and writer & editor of some blogs, has expert knowledge & experiences of Nepalese society, culture, tourist places, travels, business, literature, movies, festivals, celebrations.

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