Seasons in Nepal can be divided roughly into four seasons, although (as with weather conditions worldwide) these seasons are increasingly blurred. From the lowlands close to the Indian border to the 8,850m peak of Mount Everest, Nepal's climate is hugely altitude dependent. The landscape divides into three quite distinct zones. The Terai zone, located in the south, runs along the border with India, with some areas virtually at sea level. A belt of often humid, jungle and farmland, the temperature in the Terai, for example in Janakpur, can often hit 35°C. It's home to two of the country's most impressive national parks, Chitwan and Bardia, both of which are home to the rare One-Horned Rhino, and iridescently colourful birdlife.
The country’s heartland - Pahar - is a wide stretch of rolling foothills and valleys, where villages perch on the hilltops and bright green paddy fields step down the contours. The Kathmandu Valley is located within this area. Crammed with spectacular ancient cities and villages trapped in time, it's a treasure trove of cultural delights, buzzing markets and streets packed with colour and noise. Temperatures here tend to be pleasantly warm year-round, perfect for exploring, though you’ll need a fleece in the evenings and early mornings during winter months.
At the northern reach of the country, bordering Tibet and rising to exceptionally high altitude, there's the Himalaya mountain range. It's a wildly beautiful panorama of jagged snow-capped mountains, glacial lakes and flower-strewn valleys. No matter where you are in Nepal, on a clear day those lofty peaks loom above everything. In this region, places like Namche Bazaar, which sits at an altitude of 3,450m, experience temperatures of -7°C at night.