Key Facts
• August 3: High-pressure system over the Sea of Japan brings widespread sunshine.
• Afternoon thunderstorms likely in eastern Japan’s mountainous areas.
• Typhoon expected to pass south of Kanto, causing high waves along the Pacific coast.
• Temperatures may reach up to 40°C in some areas.
• 39°C forecasted in Tsuyama, Shobara, and Yamaguchi.
• 38°C expected in Kofu, Nagoya, Gifu, Kyoto, Okayama, Takamatsu, Hita, and Miyakonojo.
• 37°C predicted in Aizuwakamatsu, Maebashi, Kumagaya, Osaka, Nara, and Iizuka.
• Heatstroke alerts issued for 36 prefectures in Okinawa, western, and eastern Japan.
• Minimum temperatures: 24°C in Sapporo, 27°C in Tokyo, 28°C in Nagoya and Osaka.
• Maximum temperatures: 30°C in Sapporo, 36°C in Tokyo, 38°C in Nagoya.
• Weekly forecast: Rain expected in northern Japan from August 5; heatwave to ease after August 7.
Summary
Japan will experience widespread sunshine on August 3 due to a high-pressure system over the Sea of Japan. Afternoon thunderstorms are expected in eastern Japan’s mountainous areas, while a typhoon passing south of Kanto may cause high waves along the Pacific coast. Temperatures could reach up to 40°C, with heatstroke alerts issued for 36 prefectures, including Okinawa and regions in western and eastern Japan. Residents are advised to avoid outdoor activities during peak heat and use air conditioning to prevent heat-related illnesses. Minimum temperatures will range from 24°C in Sapporo to 28°C in Osaka, while maximum temperatures will peak at 38°C in Nagoya. The heatwave is expected to ease slightly after August 7, with rain forecasted in northern Japan starting August 5.
