Overview

• Japan reached an all-time high of 41.8°C in Isesaki on August 5, eclipsing last week’s 41.2°C peak, the Japan Meteorological Agency said
• Thirty-nine Japanese locations set new local temperature records, including Kyoto recording 40°C for the first time
• July 2025 was Japan’s hottest month since 1898, with the average temperature 2.89°C above the 1991–2020 baseline
• South Korea registered its second-hottest July on record at 27.1°C, with 14.5 days of heat waves and 22 consecutive tropical nights in Seoul
• Long-range forecasts anticipate above-average heat across East Asia through September due to lingering high-pressure systems