Depending on the region, trekking can be done in Nepal all year long. In Nepal, there are as many different altitudes as there are climate variations. The midland hills are warm temperate (1200-3100m) and cool temperate (2100-3300m) while the high mountains are Alpine (3330-5000m) and tundra (5000-8848m). The lowland plains are subtropical (600-1200m).
The ideal trekking season in Nepal is thought to be from mid-September to mid-December.
During this time, visibility will be better. Generally speaking, the weather is clear, with mildly warm days and chilly nights. Natural disasters are less likely, allowing for safe and wonderful trekking experiences. This time of year also marks the beginning of the two biggest festivals in Nepal, Dashain and Tihar (Festival of Lights).
Winter (December to February)
The Himalayan region can freeze over in the winter due to heavy snowfall. In higher elevations, trekking can be difficult because the trail may be covered in snow. Lower elevations below 3000m are suitable for trekking during the winter. The temperature will range from 10 to 15 degrees Celsius in the low plains region, -18 degrees Celsius in the Himalayan region, and 0 to 5 degrees Celsius in the hilly region.
Season of Spring (March to May)
Trekking in the spring is really a lovely time of year because the hilly slopes look like a garden of wildflowers in bloom, with lush green fields and unobstructed views of the mountains. It feels like being in the right place at the right time when you can hear birds singing all around you. At lower elevations, the weather will be mild and warm, but at higher elevations, it will be cold. The mornings in spring are typically very clear, while the afternoon clouds bring showers of rain.
Summertime (June to August)
Summertime brings cloudy mornings and mostly rainy afternoons and evenings. Trekking is extremely uncomfortable because the trail is muddy, risky, wet, and full of leeches. In hilly areas, there is a high likelihood of natural disasters, particularly large landslides. You must remember to bring insect repellents if you plan to hike. The Himalayan region will have temperatures between 16 and 20 degrees Celsius, the hilly area between 20 and 30 degrees Celsius, and the plain area between 34 and 39 degrees Celsius. Summer is the best season for botanists and researchers in forests and at higher elevations, even though trekking is not recommended at this time. It won't be particularly hot or cold in various locations in Nepal, such as Manang, Mustang, and Dolpo, which are somewhat protected from the rain.
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