Kiso is located in west-central Nagano Prefecture, in the valley of the
Kiso River.
Surrounding municipalities • Nagano Prefecture •
Asahi •
Kiso (town) •
Matsumoto •
Shiojiri Climate The village has a climate characterized by characterized by cool and humid summers, and cold winters with heavy snowfall (
Köppen climate classification Dfb). The average annual temperature in Iijima is 5.7 °C. The average annual rainfall is 1860 mm with September as the wettest month. The temperatures are highest on average in August, at around 18.6 °C, and lowest in January, at around -6.7 °C. }} ==Demographics==