Main Season
Higher up, it gets cold in the winter, but it's a great time to visit Nepal because the skies are so clear. Trekking in the lower Himalayan foothills and the jungles of Chitwan and Bardia in the south of Nepal are both great in the winter.
Trekking in Nepal is most popular in the spring, when temperatures rise steadily and the weather is usually more stable. But there are more people on the trails, and the sky can be hazy at times. In the spring, there are many fun celebrations, like Holi in March and the Nepalese New Year in April.
Summer is the monsoon season. It is hot and humid, and most places where people go trekking have cloudy skies and rain. Choose a trek in the "rain shadow" of the Himalaya, such as Upper Mustang or Nar Phu, at this time of year. In June, the Yarthung Horse Festival is held in Manang.
Most people go hiking in the fall because the weather is usually stable, the temperatures are mild, and the skies are usually clear. Since the weather is at its best, so are the number of people there. Dashain (in October) and Tihar are two of the biggest festivals in the fall (November).
