Days are usually clear above 2,500 meters, though depending on the season, the weather in the mountainous region can occasionally be erratic.

In Nepal's Himalayan regions, the main trekking and travel seasons run from April to May. The mornings and middays are typically sunny and clear during this time, but occasionally the afternoons can be cloudy and obstruct views of the peaks.

Between September and November, when the days are usually clear with blue skies and mountain views, is the ideal time to travel to Nepal's Himalayan regions.

Although there is a small chance of snow above 2,800 meters, the day will be fine with some sunshine and cold in the morning, late afternoon, and in the shade.

The monsoon rainy months of July through mid-September are cloudy and humid, but they are also the rainiest.

The best time will be from March to May when the 2,000–3,000 m high wildflowers are in full bloom and the treelines and vegetation begin to decline for the rough arctic terrain. While it will be sunny and between 15 and 20 degrees Celsius during the day, the morning and evening hours can be much colder, with a minimum of -0 to 05 degrees Celsius, without taking the effects of the wind into account.

Use powerful sunscreens and creams to protect your skin because the atmosphere is thinner and less pressured above 3,000 meters. You should also use good sun/snow glass to prevent the strong and bright reflection of the sun and snow.

The clearest days from mid-September to December will have maximum temperatures of 15-20 degrees Celsius during the day in direct sunlight and minimum temperatures of -5 to -10 degrees Celsius in the morning and at night.

The coldest months, from December to March, will be the coldest, with minimum temperatures of -10 to -15 degrees Celsius and maximum temperatures of 15 to 18 degrees Celsius without wind chill. However, the majority of the daytime will be clear and blue.