Weather and Climate in Nepal is totally different the some where else due Himalayan country of the world. It has got a three different levels of geographical landscape as lowland region, hilly region and the Himalayan region. There are climatic variations in each region. Lowlands are pretty warm, hilly regions are moderate and Himalayan regions are cold. The weather changes frequently in the mountain regions, even several times a day. It may not be the same weather as forecasted. Here are the weather and climatic variations in Nepal:
Autumn is the main trekking season in Nepal. During this season, the weather is crystal clear from morning to evening. So, all the Himalayan views are breathtaking. The days are pretty warm and the nights get cold on the mountain range. But, the trails are always busy with foreigners in major trekking areas.
Winter is the quiet, low season for the trekking because the weather will be cold in the Himalayas. There will be heavy snow fall. However, easy and short trekking can be done at this time. Days are short and chilling. The Place of low altitude and cultural visits are popular for winter. If you still love extra adventure, you may select trekking in the Annapurna and Langtang Everest regions. Another good thing is less crowded people at lodge and trails.
Spring is very much suitable season for Nepal travelling. It is the time when trees, meadows and forests begin to be green everywhere. It can be raining occasionally around the evening and during the day. It is the big season of blooming flowers in the whole forest, including Rhododendron and bush flowers. April is also a good time for the high passes trekking and climbing peaks. So, Spring is the best choice for trekkers and climbers after autumn due to the fine weather.
The monsoon of Nepal is determined by the Bay of Bengal in India. In the past, monsoon season used to take as off season due to the muddy trails and frequently falling landslides. Now, the climate change has made the trekking possible, even in the monsoon. The season is suitable to trek in the Himalayan rain shadow area. Monsoon is a nice season to explore the forbidden kingdom of Upper Mustang, sacred pilgrimage destination Muktinath, Jomsom and some of the other trails of Annapurna region. These places are rich in natural and cultural heritages. Dolpo and Tibet are other options to explore during Monsoon.