Kyonan is located in southwestern
Bōsō Peninsula, about 60 kilometers from the prefectural capital at
Chiba and 60 to 70 kilometers from central Tokyo. Facing the
Tokyo Bay coast, the inland mountainous area is part of the
Bōsō Hill Range. At the southern end is Nishigasaki, which juts out into the Uraga Channel. The coastline is rugged and has fishing ports such as Yasuda and Katsuyama. There are also many islands and reefs. The town extends approximately 10.75 kilometers east to west by 7.3 kilometers north and south. The coastal portion of the town is within the boundaries of the
Minami Bōsō Quasi-National Park.
Neighboring municipalities Chiba Prefecture •
Futtsu •
Kamogawa •
Minamibōsō Climate Kyonan has a
humid subtropical climate (Köppen
Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Kyonan is 15.2 °C. The average annual rainfall is 1804 mm with September as the wettest month. The temperatures are highest on average in August, at around 26.1 °C, and lowest in January, at around 5.4 °C. ==Demographics==