Around The HimalayaClimate Of Nepal

Climatic conditions of Nepal vary from one place to another in accordance with their geographical features. In the north summers are cool and winters severe, while in the south summers are tropical and winters are mild. Nepal has five seasons: spring, summer, monsoon, autumn and winter.
In the Terai (south Nepal), 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 Kathmandu Valley has a pleasant climate with average summer and winter temperatures of 19°C – 35°C and 2°C – 12°C respectively.
Good to know is that on average temperatures drop 6°C for every 1,000 m you gain in altitude. 
The Himalayas act as a barrier to the cold winds blowing from Central Asia in winter, and forms the northern boundary of the monsoon wind patterns. Eighty percent of all the rain in Nepal is received during the monsoon (June-September). Winter rains are more pronounced in the western hills. 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.
There is no seasonal constraint on traveling in and through Nepal. Even in December and January, when winter is at its severest, there are compensating bright sun and brilliant views. As with most of the trekking areas in Nepal, the best time to visit are during spring and autumn. Spring is the time for rhododendrons while the clearest skies are found after the monsoon in October and November. However, Nepal can be visited the whole year round.
Climate & Weather in Nepal
Nepal’s climate varies with its topography. It ranges from tropical to arctic depending upon the altitude. The Terai region, which lies in the tropical southern part of the country, for instance, has a hot, humid climate. The mid-land regions are pleasant almost all year around, although winter morning and nights are cool. The northern mountain region, around an altitude above 3,353 meters has an alpine climate with a considerably lower temperature and thin air in winter as can be expected. 

Nepal has four climatic seasons.
(a) Spring: March - May,
(b) Summer: June - August,
(c) Autumn: September - November and 
(d) Winter: December -February.                                                    

Spring is colorful season which is punctuated by the odd shower of life-giving rain but the heat gradually builds until the monsoon relief arrives. During summer the Monsoon; moisture-laden wind, gathers in the Bay of Bengal and sweep up across India to spend its force on the Himalayan mountain chain. Autumn is renowned for clear skies and pleasant temperature. By winter the high hills take dry brown shades and the mountains are occasionally dusted with fresh snow. However due to Nepal’s vast range of diversified land orientation as well its amazing climatic variation effects regular seasons different and are six in Nepal. 

Nepali Seasons
Spring -     Basanta         April-May      
Summer -  Grishma          June-July      
Monsoon - Barsha           Late June-Mid September       
Autumn -  Sharad            September-November      
Winter -    Hinud              December-January      
Windy -     Sisir                February-March     
The climate and weather varies according to its season in Nepal. The winter season which falls from end November to March, in which the weather is stable and he sky mostly is clear. It is the coldest weather. During this season, the haze often sits in valleys and reaches up to the Himalaya which make unclear sky, possible to have trekking in the lower altitude areas trekking, as because, the snow falls heavily in the higher altitude areas making travelers difficult to walk and sea the clear views of the mountains etc. But it does not snow in Kathmandu and you can travel in the plain land in the Terai area, but in the morning and evening it is really cold, need to prepare for the bad weather.

The autumn that starts from Mid-September to end November, in which the weather is a little humid with sunny days and warm nights. It is the most popular season for trekking or tour in Nepal. During this season, the hills seem to the colorful and the sky is so clear that you will be able to have amazing vistas including that of mountains, landscapes, and more. Because of amazing weather, the major trekking trails in Nepal such as Everest, Annapurna, Langtang and so forth are filled by the travelers. The spring is one another most popular season for trekking in Nepal which falls from March to May. The weather is warmer and the day is longer. The rhododendrons flowers blooms making the trail look beautiful and amazing feeling. This season is especially suit trekking to the higher altitude area trekking including the peak climbing and expedition. The lower altitude area is warm and even so hot.

The summer season is a bit difficult to travel in Nepal which falls from June to September. During this season, it rains heavily and therefore, why people avoid trekking but in Nepal, there are numerous rain shadow areas like Mustang, Dolpo areas, where there rains little. But the mountain areas are covered with the fog and rains almost every day, the trails are slippery also the leeches are so active, and therefore create difficulty to have better sky and the scenery. However, this season is a really amazing season as there is greenery everywhere; the valleys are filled with flowers and butterflies.

Autumn (mid-September to end-November)
This is the most popular season for having trekking in the mountain or high altitude area. Usually, during autumn, the weather is a bit warm with clear sky or days and nights are a bit cold. In the higher altitude, the nights sometimes even drop down to zero temperature. In this season, the mountains views are surprisingly clear, so that you will be able to have amazing vistas including that of mountains, landscapes, and more.

Winter (end-November to March)
During this season, the weather is stable and the sky is mostly clear and therefore, it is also possible to have trekking. During the day the temperatures are cool, but the night is often very cold and freezing. The days are generally clear but often storms and snows freezing. As it snows heavily in the high Himalaya, it is possible to have trekked in the lower altitude areas. Since it does not snow in Kathmandu and in Terai, the plain land and therefore, it is the best seasons or times to travel in them.

Spring (mid-March to May)
During the spring, it is usually clear in the morning but the cloud covers in the afternoon and sometimes it rains as well. During this season you can have amazing greenery as the flowers such as rhododendron, jasmine, pine, etc. blossom. It is the second most popular season for trekking as the weather and climate are such a wonderful and pleasant.

Summer (June to mid-September)
During monsoon, the morning usually is cloudy and even the day which covers all the ridges and Himalayas making it difficult and uncomfortable to see. The weather, however, is hot and it rains almost every day. The trekking trails usually are muddy and the leeches often are active. During this season, it is possible to have trekked in the trans-Himalayan regions of Mustang, Dolpo and so forth, since these areas lie in a rain-shadow. And therefore receive significantly less precipitation than other parts of the country.
Weather and Climate in NepalThere are the climatic variations in Nepal according to the geographical structures of the country as Himalayan, Hilly and Terai (plain lands) region. It is pretty hot and humid in the lower region, moderate in the hilly region and cold in the alpine region. Nepal has four climatic seasons.
Autumn (September - November).
The weather is clear during the autumn season. The days are pretty warm, but the nights are cold. It is freezing in the higher elevation. It is the festival time in Nepal and also the mountains views are crystal clear..
Winter (December - February).
The days are cold in low lands and hilly region, but it is minus temperature in the high Himalayas. Except sometimes, the days are clear. There will be heavy snowfalls at the higher elevation and sometimes also at the lower elevation of 2500m. January and February are the coldest months. Travel and trekking are adventurous during the winter season.
Spring (March - May).
Spring is another season of fine weather. The mornings are clear and slightly cool, but it can be thundering and occasional rain. The days are warm and the views are interesting. It is the season of blooming various flowers and greeneries prevail on the forest. Most of the trekking trails are colored with rhododendrons. It is a snow free time, even in the Himalayan regions and trails. Around the end of April, the days are cloudy.
The Summer/ monsoon (June - August).
The monsoon season in Nepal starts from June and remains till the mid of September. The mornings are cloudy and it rains the whole day, especially in the months of July and August. Thunderstorms are usually in these months. Except the trans-Himalayan regions of Dolpo and Mustang, all the other trails become muddy so the travel activities are quite difficult. Small streams become larger and there is possibility of frequent landslides in the hilly areas.
Climate and Weather in Nepal

ClimateClimatic conditions of Nepal vary from one place to another in accordance with the geographical features. In the northern summers are cool and winters severe, while in south, summers are tropical and winters are mild. Nepal has namely five major seasons: spring, summer, monsoon, autumn and winter. An average temperature drop of 6°C occurs for every 1,000 m gain in altitude. In the 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 Himalayas act as a barrier to the cold winds blowing from Central Asia in winter, and forms the northern boundary of the monsoon wind patterns. Eighty percent of the precipitation is received during the monsoon (June-September). Winter rains are more pronounced in the western hills. 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. An interesting fact is that there is no seasonal constraint on traveling in and through Nepal. Even in December and January, when winter is at its severest, there are compensating bright sun and brilliant views. As with most of the trekking areas in Nepal, the best time to visit are during spring and autumn. Spring is the time for rhododendrons while the clearest skies are found after the monsoon in October and November. However, Nepal can be visited the whole year round. Source: NTB
For more information about Nepal’s climatic conditions, please visit: http://www.dhm.gov.np (official web site of the Department of Hydrology & Meteorology, Ministry of Environment).
WeatherNepal has four seasons such as autumn (Sep. Nov. and Oct.), winter (Dec. Jan. and Feb.), spring (March, April and May) and monsoon (June, July, and Aug.). During the autumn season the nights are cold in the mountains, but the bright sun makes for pleasant daytime temperatures. At a higher altitude, temperature range from about 20°C down to perhaps -10°C at night. Morning is usually clear, and then clouds build up during the afternoon, disappearing at night to reveal spectacular starry skies.
During the winter season high passes, especially the Thorong-la pass on the Annapurna circuit trekking, Ganjala pass, Chola Pass, Renjola Pass, Khongmola pass, Lauribina pass, Gosaikunda pass are usually closed. Short and easy trek in middle hills is the best at this time. Heavy snowfalls does especially during the January, February and March in mountain areas.
Spring season brings warmer weather, but more frequent storms and considerable snowfall at higher altitude. Birds and flowers, especially rhododendrons, are seen at the lower altitudes. Toward the end of march, haze-caused by dust from the plains of India and smoke from local fires often obscure distant views. In addition, it becomes much warmer in the region below 3000 ft.
Trekking in Monsoon (June to Aug.) can be undertaken by the keen or experienced. Rain, mist and fog can be expected almost daily, but clouds part occasionally to give spectacular views of the mountains. The floors are usually at their most colorful. Leeches abound in middle elevation forests. Mountain weather is highly unpredictable. Classic signs of a storm approaching, such as cirrus clouded sky, or a fall in barometric pressure, can be misleading.
Best time for trekking in Nepal is autumn (September, October-November) and spring (March, April and May). Short treks and some Tea Houses treks can be done during winter or summer season as well. You need to be prepared for sudden weather changes while trekking. That's why trekking equipment should be chosen carefully before the trip. Sudden rain storms or snow are always a possibility which needs to be considered. The weather during the trekking season is somewhat more stable. "Asian Hiking Team" pays big attention to weather forecasts.