Nepal is a small mountainous country. However, for a small country Nepal has abundant cultural, ecological and geographical diversity. In under 1, 47,181 square kilometers, it has three major kind of topographical settings. And the weather of the country differs according to the geographical situation and altitude. From the highest point on Earth (Mount Everest) to the deepest valley on earth (Arun Valley), Nepal has quite the interesting features. Weather of Nepal is directly affected by its geographical built and the season of the year.
Let’s break down the weather in Nepal according to those factors:
Not just the season but weather depends on the geographical situation too. June to September mostly is the summer and monsoon season in Nepal. The reverse wind from Bay Bengal brings about a lot of rain. Hilly region and Terai or the plains get abundant rainfall during this time. Hilly region is till 3000 meters, that’s where tree lines start getting thinner and during summer the weather in hilly region gets hot, humid and moderate to chilly during rain. Temperature of hilly region during summer/monsoon time usually stays under 30 degrees Celsius. In the Terai or the plains which is to the south of Nepal, there is abundant rainfall but temperatures soar up and it can get as hot as 30to 35 degrees.
Mountainous region has quite unpredictable weather. The huge soaring winds bring clouds and mountains remain mostly enveloped inside. Steep trails get slippery, huge winds as the altitude increases and even the days are humid and hot in the lower mountainous region, nights are freezing. As you go up, daily afternoon weather is windy and quite warm, but nights do get absolutely freezing. However, this season of the year is low tourist season, there are discounts on hotels and few to no people in the trails.
This is the second-best time of the year to visit Nepal for treks and anything to do with mountains. In the mountainous region, spring is the time for new rhododendron blooms, the whole forest is covered in red, white and pink rhododendron flowers. Daily weather is moderate and you can still enjoy snowfall at a certain height (above 3500meters). Maximum temperature stays usually at 25 degree Celsius in the lower mountainous regions while during night it can drop to freezing or one digit numbers. The Southern part of Nepal or the Terai region sees medium to hot weather reaching till 30 degree Celsius during this time while hilly region enjoys a moderate weather of up to 25 degree Celsius temperature at most usually.
This is the time of the year which is deemed best to visit Nepal that is because the weather is perfect. There’s no monsoon wind or summer heat or the winter cold. Weather is pleasant, in Kathmandu or the hilly regions temperatures go from 12 degrees Celsius to under 25 degrees. The southern plains cool down a bit as well. The weather in the mountains is loveliest of all season. You don’t have clouds blocking your views that much, blue starry skies for night and moderate temperature during the day. Temperature falls by around 6 degrees for every 1000 meters of difference in distance. And even though it is supposed to be the best season of the year, when you are above 5000 meters weather is so unpredictable.
These three months signify the peak winter season for hilly and Terai regions in Nepal. Cities like Kathmandu and Pokhara can get pretty cold, temperature at times falls to 0 degree Celsius or at least to one digit numbers. The Southern plains deal with heavy and thick mist and cold wave. The mountains receive a lot of snowfall. Temperature can drop to minus double digit in numbers. Trekking during this time of the year is a lot of hard work. However, it is not impossible. People looking for isolated trekking routes or a lot of snow treks during this time.