Overview

• Central Tokyo hit 35.3°C at 10:42 a.m. on Aug. 27, notching a 10th consecutive day at or above 35°C and surpassing the 2022 nine-day streak.
• Tokyo’s 2025 count of days reaching at least 35°C rose to 23, eclipsing the previous annual high of 22 set in 2023.
• The Japan Meteorological Agency reports a wide-area high-pressure dome is the immediate driver of the extreme temperatures.
• By 4 p.m. on Aug. 26, 136 of 914 observation points nationwide recorded 35°C or higher, with highs including 38.0°C in Mima (Tokushima), 37.6°C in Kiryu (Gunma), and 37.5°C in Kumagaya (Saitama).
• Forecasts indicate a southward-moving front may bring clouds or rain, though daytime highs above 30°C are expected to continue for several days.