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Japan Weather in August

Nijo Castle
Nijo Castle, Kyoto
Although it is the last month of summer, August is the hottest in Japan. The average temperature is as high as 31°C (87.8°F) throughout Japan during the daytime, while some cities see a high temperature of 33°C (91.4°F) averagely. Thus, Japanese Alps and the north become great summer retreats to get away from intolerable heat. As the rainy season has gone, it gets somewhat drier with only a few torrential rains. To the end of August, the high season of typhoons is arriving, which requires visitors to watch the local weather forecast on journey.

The hottest cities in Japan in August:
Osaka: 30℃ (86℉), Naha: 29℃ (84.2℉), Nagasaki: 29℃ (84.2℉), Kagoshima: 29℃ (84.2℉), Hiroshima: 29℃ (82.4℉), Kobe: 29℃ (82.4℉)
The coolest cities in Japan in August:

Kushiro: 19℃ (62.6℉), Wakkanai: 20℃ (64.4℉), Asahikawa: 22℃ (69.8℉)     


Averages for Japan Weather in August

High Temperature
31°C (87.8°F)
High Temperature
24°C (75.2°F)
Rainfall
154 mm (6.1 in)
Sunrise
04:49 ~ 05:12
Sunset
18:10 ~ 18:45



August Temperatures in Japan


What to Wear
During this hottest month in Japan, short-sleeve clothes breathable and moisture-absorbing are the best, like T-shirt, shorts, dress, skirt, and cropped pants. A pair of comfortable sandals is good for such a torrid weather, especially convenient to have fun on beach. Sunglasses, sunhat or parasol are also essential for sun protection.
 
August Travel Guide – Where to Go & Tips

Tourism Rate: 


1. Okinawa for Beach Fun

Okinawa embraces dotted islands in the sea, with stunning beaches of great scenery and colorful activities. It is the best destination for beaches in Japan, where surfing, snorkeling, beach volleyball, etc. are all welcomed. However, it’s necessary of sun protection under the burning sun.

Apart from Okinawa, Izu, Nagasaki, Enoshima, etc. are the great beach destinations as well in Japan.

2. Hiroshima: Commemoration of Peace

Hiroshima was the first and one of the two cities bombed by an atomic bomb in August, 1945. Atomic Bomb Dome left over in the disaster, Hiroshima Peace Memorial Park, and Hiroshima Peace Memorial Museum show you the tragic history in memory of peace. In early August, there is the commemorative ceremony and more memorial activities, which also attract many visitors.

Japan Seasides Hiroshima
Shore of Miyajima Island

Atomic Bomb Dome Hiroshima
Atomic Bomb Dome, Hiroshima


3. Mt. Fuji Mountaineering

As mountaineering on Mt. Fuji is allowed throughout August, you can climb to the summit from the 5th Station. As there might be sudden afternoon showers on the mountain, you need prepare thicker clothes and rain gear beforehand.

4. Fireworks/Natsu Matsuri

Natsu Matsuri with fireworks show is the greatest event during July and August around Japan. Aomori Nebuta Festival is the grandest one in early August. The giant lanterns in the image of ancient generals and others, bringing you into a wondrous world and showing old stories. Akita Kanto Festival is also popular in early August, where the splendid lanterns in night and the local excellent skill to hold dozens of lanterns with a pole. In 2025, this festival will be held from 2nd to 7th in August.

5. Obon Celebration

Obon is a major festival and holiday in mid-August in Japan, and it’s celebrated with varied activities in different cities, like special festival dance and lantern show in a temple or shrine. Awa Odori Dance Festival is the best-known gathering during the Obon in Tokushima, Shikoku; the local folk dance catches the attention of many tourists, in particular culture buffs. It will be celebrated from 13 to 15 in August in 2025.

August Weather of Major Japan Cities
August
Temperature Sunrise / Sunset Humidity
(%)
High Low
Aomori
26°C / 78.8°F 19°C / 66.2°F 04:47 / 18:35 80
Asahikawa
26°C / 78.8°F 18°C / 64.4°F 04:29 / 18:24 75
Fukuoka
32°C / 89.6°F
25°C / 77°F
05:41 / 19:05
73
Hiroshima
32°C / 89.6°F
26°C / 78.8°F
05:31 / 18:57
70
Kagoshima
33°C / 91.4°F
26°C / 78.8°F
05:43 / 19:01
74
Kanazawa
32°C / 89.6°F 24°C / 75.2°F 05:11 / 18:44 70
Kochi
31°C / 87.8°F
24°C / 75.2°F
05:28 / 18:52
77
Kyoto
33°C / 91.4°F
25°C / 77°F
05:18 / 18:45
67
Nagoya
32°C / 89.6°F 25°C / 77°F 05:13 / 18:41 72
Naha
31°C / 87.8°F
28°C/ 82.4°F
06:02 / 19:04
78
Nara 33°C / 91.4°F
25°C / 77°F
05:17 / 18:44
67
Niigata
29°C / 84.2°F 24°C / 75.2°F 04:59 / 18:36 74
Osaka
33°C / 91.4°F 27°C / 80.6°F 05:18 / 18:46 61
Sapporo
27°C / 80.6°F 19°C / 66.2°F 04:40 / 18:37 72
Sendai
27°C / 80.6°F 22°C / 71.6°F 04:51 / 18:29 84
Tokyo
30°C / 86°F 26°C / 78.8°F 05:01 / 18:30 72