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Record High Temperatures in Japan
[2018.08.30]

A list of record high temperatures in Japan reveals that a huge number were set in 2018.

A temperature exceeding 40 degrees was recorded in Japan for the first time on July 25, 1933, in Yamagata; the high reached 40.8 degrees that day. It was caused by a phenomenon known as a “foehn wind” in which wind from over the bordering mountain ranges in Niigata Prefecture was transformed into hot air as it blew down into the plains. That record remained unbroken for 74 years, until a temperature of 40.9 degrees was recorded in both Tajimi, Gifu Prefecture, and Kumagaya, Saitama Prefecture, on August 16, 2007. These were surpassed, in turn, on August 10, 2013, when the temperature reached 41.0 degrees in Shimanto, Kōchi Prefecture.

In the summer of 2018, Kumagaya set a new record high for Japan of 41.1 degrees. This year also saw two near-record high temperatures of 41.0 degrees. In the list of Japan’s record highs, 2018 is by far the most highly represented year. Several other cases of temperatures exceeding 40.0 degrees not included on the list were also recorded in 2018, including a temperature of 40.3 degrees in Nagoya on August 3.

Highest Temperatures on Record in Japan

1 Kumagaya, Saitama 41.1 July 23, 2018
2= Shimanto, Kōchi 41.0 August 12, 2013
2= Mino, Gifu 41.0 August 8, 2018
2= Gero, Gifu 41.0 August 6, 2018
5= Tajimi, Gifu 40.9 August 16, 2007
5= Kumagaya, Saitama 40.9 August 16, 2007
7= Tainai, Niigata 40.8 August 23, 2018
7= Ōme, Tokyo 40.8 July 23, 2018
7= Yamagata, Yamagata 40.8 July 25, 1933
10= Tajimi, Gifu 40.7 July 23, 2018
10= Tajimi, Gifu 40.7 July 18, 2018
10= Kōfu, Yamanashi 40.7 August 10, 2013
13= Mino, Gifu 40.6 July 18, 2018
13= Kōfu, Yamanashi 40.6 August 11, 2013
13= Katsuragi, Wakayama 40.6 August 8, 1994
13= Hamamatsu, Shizuoka 40.6 August 4, 1994
17= Gero, Gifu 40.5 August 8, 2018
17= Koshigaya, Saitama 40.5 August 10, 2013

Created by Nippon.com based on materials published by Japan Meteorological Agency (shaded areas are for 2018).

(Translated from Japanese. Banner photo: © Jiji.)

  • [2018.08.30]
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