The best trekking seasons in Nepal are Spring (March to May) and Autumn (September to November).
Spring Season (March to May)
Spring is one of the ideal time for outdoor activities such as trekking, Peak Climbing, and Hiking in Nepal. The weather is typically stable, with clear skies, dry conditions, and comfortable temperatures during spring. High-altitude treks like the Annapurna Trek and Everest Base Camp Trek are fantastic in the spring.
It's a beautiful time to trek in Nepal in the spring because the weather is mild and the flowers bloom. As spring brings blooming, you see so many flowers in the Himalayas. Especially, deep Rhododendron blooming forest near Ghorepani in Annapurna Trek.
Autumn Season (September to November)
Autumn is another best season in Nepal. Autumn is a well-liked time of year for trekking in Nepa lbecause the trails are dry and the vegetation is vibrant. Autumn is just after the end of Monsoon Season in Nepal. So the temperature will be mild (not very hot and not very cold) in Autumn.
Flight cancellations and delays are uncommon at this time of year. However, the monsoon season is particularly prone to them. Additionally, heavy fog frequently causes flight cancellations in the winter.
Autumn is best time to visit Everest region because the clear sky is very clear and clear. It offers the best sunrise and sunset views over the mountains. The view of Mount Everest from Kalapathar and Gokyo Ri is breathtaking.
Winter Season (December to February)
Winter can bring frigid temperatures and trail closures due to snow at higher elevations. The Annapurna region and some of the Langtang treks are still accessible and offer exciting experiences. During this time, you can visit Chitwan and Bardiya National Parks to learn more about Nepal's incredible wildlife.
Monsoon Season (June to August)
The monsoon season, which lasts from June to August, brings heavy rains and high humidity, making trekking challenging. The strong winds, rain, and sporadic clouds obscure the view.
The trails may be slick and muddy, so trekking is generally not advised during this time of year. However, trekking is possible in the dry regions (such as Upper Mustang and Upper Dolpo).
Given that June is the hottest month in Nepal and the summer monsoon occurs between June and September, these aren't the ideal times to travel if you want to go hiking. However, seeing the nation thriving with newness and growth is beautiful. Winter is very chilly, especially in January and February. You'll be among the only visitors in the mountains if you dress warmly.