Nagoya, Japan, with +40,0°C at the End of Summer, 0,3°C below All-time Record!

Japan was facing an unprecedented late-summer heat wave, with Nagoya reaching a staggering 40.0°C, marking a historic milestone for the city. All-time record for the city is +40,3°C and it was in the last August 2025 days almost broken! /https://en.wikipedia.org/wiki/Nagoya – see climate records table/

Several all-time records fell alongside Nagoya’s peak: Obu recorded 39.0°C, Tsuchiyama reached 37.4°C, and Hari climbed to 36.1°C, all surpassing previous historic highs. Meanwhile, monthly records were also obliterated, including Toyota at 39.6°C and Ogaki at 38.8°C, emphasizing the intensity and widespread nature of this late-season heat wave.

This extreme heat at the end of summer is highly unusual for Japan, where temperatures typically begin to decline in September. The event has brought dangerous heat stress, especially for urban populations, and underscores the continuing trend of record-breaking extremes across the country.

With 40.0°C in Nagoya, this late-summer surge ranks as one of the hottest days in Japan’s history, rivaling even the hottest midsummer peaks. The combination of all-time highs and shattered monthly records across multiple cities highlights a regional climate anomaly of exceptional severity.

In summary, Nagoya’s 40.0°C marks a new benchmark for extreme late-summer heat in Japan, accompanied by widespread record-breaking temperatures in surrounding cities, cementing September 2025 as one of the most remarkable heat periods in the nation’s meteorological history.

Source: https://www.nanoge.org/IPEROP26/location/location