Ōme is located in the Okutama Mountains of western Tokyo, bordered by
Saitama Prefecture to the north. The
Tama River runs from west to east almost in the center of the city area, and the Kasumi River and Naruki River, which are tributaries of the Iruma River (
Arakawa River system), also flow from west to east in the north. The geography changes from the flat land in the east to the hills and mountains in the west. The highest point is 1,084 meters on Mount Nabewariyama on the right bank of the Tama River in the western end of the city.
Surrounding municipalities Saitama Prefecture •
Hanno to the north •
Iruma to the east
Tokyo Metropolis •
Akiruno to the south •
Hamura to the southeast •
Hinode to the south •
Okutama to the west
Climate Ōme has a
humid subtropical climate (Köppen
Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Ōme is 12.3 °C. The average annual rainfall is 1998 mm with September as the wettest month. The temperatures are highest on average in August, at around 23.8 °C, and lowest in January, at around 0.7 °C. {{Weather box ==Demographics==