OCN is a three letter abbreviation that stands for: 1  OCLC Control Number, a bibliographic record identifier. 2  In Oncology nursing, an Oncology Certified Nurse. 3  Opaskwayak Cree Nation. 4  Open College Network.
Autumn is from September to November and is characterised by light breezes and cooler temperatures of around 46-50ÂºF. Itâs during autumn that many exhibitions, music concerts and sports tournaments are held in Japan.
Go to our Nature and Climate section to find out more. What is Japan's average summer temperature? Summer in the far north of Japan (Hokkaido) is warm, with an average temperature of about 22 degrees Celsius (72 degrees Fahrenheit), while in Tokyo summer is hot and humid, with an average temperature of around 25 degrees Celsius (77 degrees Fahrenheit).