Weather & Climate

Weather & Climate

Nepal climate varies according to its season. Autumn and spring are the two most favorable seasons for visiting Nepal. Autumn starts from early September to early December and brings in clear weather with sunny days and warm nights whereas spring starts at the beginning of March up to the end of May with occasional rain. From July to September, is the monsoon begins. Trekking is generally difficult and uncomfortable as the climate of Nepal at this time of year is hot, humid and rainfalls almost every day. The trails become muddy and are often leech-infested. Moreover, the mountains are usually obscured by cloud. There are, however, possibilities for summer trekking in the trans-Himalayan regions of Mustang, Dolpo and Tibet. These regions lie in a rain-shadow and therefore receive significantly less precipitation than the more southerly areas.


CLIMATE CONSIDERATION FOR TREKKING TRIPS

The best seasons to trek in Nepal are autumn, from mid September until end November and spring, from the beginning of March until the mid May.
Spring / summer (mid-March through June)
In the spring, the mornings are usually clear but afternoon cloud build-up brings occasional showers. The days are mix up with warm and rain, which displays wildflowers like rhododendrons. The whole country is lush and abundant in greenery at this season. This period instigate the second most popular and pleasant trekking season as this is rice-planting time. Late-march into April is especially beautiful. It is also a good time for climbing as the high passes are usually snow free and the mountain views are still clear in April. Up to June, the weather becomes hazy and disturbed with the clouds.
The monsoon (July to mid-September)
From July to September, is the monsoon season. Generally the morning is cloudy. Trekking at this time of year is generally difficult and uncomfortable as the weather is hot and it rains almost every day. The trails become muddy and are often leech-infested and the mountains are usually obscured by cloud. During April and May, there is an expectation of thunderstorm, hail shower and strong winds among the fine periods. There are, however, possibilities for summer trekking in the trans-Himalayan regions of mustang, Dolpo and Tibet. These regions lie in a rain-shadow and therefore receive significantly less precipitation than the more southerly areas.
Autumn (mid-September to end-November)
This is the most popular time for trekking. Generally during autumn, the weather is clear with mild to warm days and cold nights. However, in the higher altitude, the nights drop into freezing temperature. In this season, the mountains views are astonishingly clear.
Approach to winter / mid winter (November- mid February)
It is also possible to trek during winter, from December until the end of February. Daytime temperatures will be cooler; however, the nights will often be very cold. The days are generally clear but occasional winter storms can bring snow as low as 2500m. Early October through late November is also the busiest period for trekking. But in mid winter (January through March), trekking is more challenging in the high altitudes with semi-regular snowfall followed by more winter storms, which break the long fine periods. The mid-December to mid-February is the coldest time.
As snow gets harder and wind condition remains stabilized in early winter, climbing some of trekking peaks is possible. Climbing Mera peak, Island peak, Chulu, and trekking in Annapurna, Everest, Langtang in early winter have been quite popular over the past few years.

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