Climate:
From the eternal snow of the high peaks to the extensive tropical lowlands, Nepal has a wide variety of climates.
Spring: March to late May: In this season, Kathmandu is in full bloom, lots of different types of flowers can be seen at this time of the year. Temperature is mild, end of the cold winter and approaching warm and hot summer. Temperatures vary between 10 ° C to 28 ° C but can rise up to 30 ° C. Between 2000 and 3000m, temperature rarely drop below 0 ° C. However, few frosts or snowfalls are possible in March above 4000 m.
The summer/monsoon period – It interrupts the majority of trekking from late June to late August. Some of the trekking regions “trans-Himalayan”, Dolpo and Mustang, however, remain protected from monsoon prevailing rest of the country. They are the only channels available in Nepal in the summer.
Autumn: mid September – mid December – Perfect temperature and weather for trekking. Brings cooler days, but clear skies. Above 3000 m altitude, temperatures can drop to -10 ° C at night.
In winter: mid-December – mid-February – Nights are generally cold, dry climate, Above 3000m, temperature drop down to 0 ° C to – 15 ° C at night, the days are often sunny.