Charts produced by Kirye Last year (2021), Tokyo had seen its coolest September in over 30 years with a mean temperature of 22.3°C. This September, according to data from the Japan Meteorological Agency (JMA), the mean temperature in Tokyo came in some 2°C warmer compared to a year earlier, with a mean of 24.4°C: Data … Continue reading Tokyo Mean September Temperatures Have Seen No Warming In 34 Years, JMA Data Show