The weather of Nikko is similar to it is in Hokkaido even though Nikko is just 150km away from Tokyo. Therefore, Nikko is called refrigerator of Kanto region. However, difference of altitude is unique in Nikko. For example, it is 530 meters above the sea around the station, while altitude of Mt. Shirane is 2578 meters. Therefore, you should check the weather in accordance with your destination because the weather will be changed by location.

There is no remarkable change in weather from the central Nikko to the entrance of the Irohazaka winding road(Altitude of 832m). However, temperature will get lower as you climb up the Irohazaka. In the winter, it will snow even though the sunny sky. It is because snow is brought by the wind from the top of the mountain. This phenomena is called Kazahana (Flowers in the wind).

Moreover, it will be foggy after you passed through the Akechidaira Plateau, east of Lake Chuzenji, around Kegon Waterfall (Altitude of 1274m). The foggy weather is influenced by landscape of Mt. Nantai, which has southeast slope.

Climbing up more, the weather often will change rapidly in a day such as sunny, cloudy, and foggy and rain (snow in the winter).

Especially in the rainy season, the weather of central Nikko is different from the weather of Oku-Nikko such as Senjogahara Plateau and west of Lake Chuzenji. It is because the Oku-Nikko is not influenced by the rainy season very much. Therefore, you should not give up the hiking in Oku-Nikko. You should check the weather at tourist information center.