Onomichi is located in southeastern Hiroshima Prefecture. It faces the
Seto Inland Sea to the south, and the coastline is intricate and forms part of the
Setonaikai National Park. The main urban concentration is in a narrow band on the coast, where there is very little flat land. Because of its unique scenery, it is often used as a filming location for movies.
Adjoining municipalities Hiroshima Prefecture •
Fuchū •
Fukuyama •
Mihara •
Sera Climate Onomichi has a
humid subtropical climate (
Köppen climate classification Cfa) characterized by cool to mild winters and hot, humid summers. The average annual temperature in Onomichi is . The average annual rainfall is with July as the wettest month. The temperatures are highest on average in August, at around , and lowest in January, at around . The highest temperature ever recorded in Onomichi was on August 15, 2024; the coldest temperature ever recorded was on 26 February 1981. {{Weather box
Demographics Per Japanese census data, the population of Onomichi in 2020 is 131,170 people. Onomichi has been conducting censuses since 1960. ==History==