Although Nepal is small in geographical area, it has vast altitude variation on its landscape and the levels. It includes the place of 80 meters elevations to the highest land point 8,848 meters from sea level on earth, which is the major influencing factor of its climatic difference. Climatic condition of Nepal vary from one place to another in accordance with the geographical location. In the north summers are cool and winters severe, while in south summers are tropical and winters are mild. Nepal has namely five major seasons: spring, summer, monsoon, autumn and winter. An average temperature drop of 6°C occurs for every 1,000 m gain in altitude. in the southern part the plain area, summer temperatures exceed 37° C and higher in some areas, winter temperatures range from 7°C to 23°C in the southern part the plain area. In mountainous regions, hills and valleys, summers are temperate while winter temperatures can plummet under sub zero.
The incredible rocky wall of mountain range works as a blockage to the cold winds blowing from Central Asia in winter, and forms the northern boundary of the monsoon wind patterns. Eighty percent of the precipitation is received during the monsoon (June-September). Winter rains are more pronounced in the western hills. An interesting fact is that there is no seasonal constraint on traveling in and through Nepal. Even in December and January, when winter is at its severest, there are compensating bright sun and brilliant views. As with most of the trekking areas in Nepal, the best time to visit are during spring and autumn. Spring is the time of blooming the flower when we can see the national flower in mid hills forest and it changes the colors of jungle to almost red. October and November is also best for visiting as that time we can see clear sky and good weather to view the fantastic Himalayan vista. However, all the year and season is suitable to make your trip to the different destinations of Nepal.