Extreme Heat Hits Japan: Hottest July Since 1898 and More to Come in August
Light House Denver – Extreme heat suddenly hits Japan in July 2025, marking the hottest month since temperature records began in 1898. The Japan Meteorological Agency reported that the average temperature for the month rose by 2.89 degrees Celsius compared to the 1991–2020 average. This increase marks the third consecutive year that Japan has broken its monthly temperature record.
On July 30, the temperature soared to an all-time high of 41.2 degrees Celsius in the western prefecture of Hyogo. This phenomenon underscores the growing impact of global warming, particularly in East Asia.
The meteorological agency warned that the extreme heat is likely to persist throughout August 2025, increasing health and environmental risks across the country. Scientists say that climate change, driven by human activity, is a major factor behind the rising frequency and intensity of heatwaves.
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In addition to soaring temperatures, Japan experienced below-average rainfall in July, especially in northern regions facing the Sea of Japan. The rainy season in western Japan also ended three weeks earlier than usual, another record-breaking anomaly.
The effects of extreme climate conditions are increasingly evident in Japan’s cultural and natural symbols. The iconic cherry blossom trees may bloom earlier than usual, or fail to bloom at all, due to unseasonably warm winters. This disrupts the natural cycle behind hanami, the cherished tradition of flower viewing.
Mount Fuji, known for its snow-capped peak, also reflects these changes. Last year, snow did not appear until early November, the latest on record, compared to the usual early October start.
These extreme conditions are raising serious concerns about the future of Japan’s climate and the global environment. Beyond health risks like dehydration, heatstroke, and respiratory issues, sectors such as agriculture and tourism also face severe challenges.
Local and national authorities are now under pressure to strengthen early warning systems, expand green spaces in urban areas, and implement concrete climate mitigation strategies. Without urgent intervention, extreme temperatures like these could become the new normal rather than the exception.
