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.
1 The average temperature in Tokyo in September is fairly hot at 23.2 Â°C (73.76 Â°F). 2  Afternoons can be hot with average high temperatures reaching 26.7 Â°C (80.1 Â°F). 3  Overnight temperatures are generally warm with an average low of 20.2 Â°C (68.4 Â°F).  In September the range/ variation of daily average temperatures is 6.5 Â°C (11.7 Â°F).