Average number of days with a temperature above 30 degrees Celsius Japan 2014-2023
In 2023, areas across Japan measured 61.8 days on average with a temperature of 30 degrees Celsius and above, the highest number of days within this range in the country's recorded weather history.
Most areas on the main island Honshu have a humid subtropical climate that is characterized by warm and rainy summers and fairly mild winters. The source stated that the average number of days with 30 degrees and above increased significantly from 26.9 days in 1910.