Autumn is the ideal time of year to visit Nepal, early November in particular. Wherever you look vast mountain views open up in front of you and the days are crisp and clear. The warm rain-free days are perfect for exploring gilded temples and wandering around prayer-flag wreathed stupas. Trekking is also a delight during November, but at higher altitudes you'll need warmer clothing in the evenings. Towards the end of the month it gets colder in the mountains and light snow showers are possible.
Hosts of migratory birds arrive in Nepal in November for the winter. Sarus crane, Indian nightjar and Bengal florican are just some of the species you might be lucky enough to see in Chitwan and Bardia National Parks. It rarely rains and the days are bright and clear so the conditions are ideal for exploring the country's cultural treasures. Tihar, the Nepalese version of Diwali, usually takes place in November and you'll see local houses and temples bedecked with lanterns and colourful street parades too. Towards the end of the month winter starts to arrive and temperatures drop. Evening temperatures in Kathmandu and Pokhara are around 10°C so bring warm clothes if you plan to travel at this time. There's frost overnight at high altitudes with temperatures at Namche Bazaar dropping to zero.