Oku-Nikko is famous for cold weather. Average temperature of January in Senjogahara plateau is -7 Celsius degrees. The lowest temperature sometimes goes down to -20 Celsius degrees. Also, skiing areas are arranged because of a large amount of snow.

On the contrary, the summer is comfortable. Average temperature of August in central Nikko is 21-22 Celsius degrees, and 18-19 degrees in Chugushi Shrine near the Lake Chuzenji. Therefore, Nikko often is called "natural refrigerator."

This cold weather helped Nikko to develop as a summer resort. In addition, plateau vegetables, strawberry and seed raising became popular in Senjogahara plateau.