Ōsakasayama (大阪狭山市, Ōsakasayama-shi) is a city in Osaka Prefecture, Japan. As of 31 January 2022, the city had an estimated population of 158,465 in 26128 households and a population density of 4900 persons per km². The total area of the city is 11.92 square kilometres (4.60 sq mi). Ōsakasayama is located in the southeastern part of Osaka Prefecture. Sayama pond, which is said to be the oldest dam-type reservoir in Japan, is located in the center of the city and is a symbol of the city. Ōsakasayama has a Humid subtropical climate (Köppen Cfa) characterized by warm summers and cool winters with light to no snowfall. The average annual temperature in Ōsakasayama is 14.6 °C. The average annual rainfall is 1475 mm with September as the wettest month. The temperatures are highest on average in August, at around 26.6 °C, and lowest in January, at around 3.2 °C. More information...
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