Average Rainfall for Japan in August

The tables below give monthly averages for rainfall during August at cities and towns in Japan. Each place has a total for how many days of wet weather it usually gets this month and for the normal amount of precipitation.

The calculation of days only includes the days when precipitation totalled at least one millimetre (0.04 inches).

The month's rainfall statistics are long-term historical averages of weather data collected from 1981 to 2010.

You can jump to a separate table for each section of the country: Hokkaidō, Tōhoku, Kantō, Chūbu, Kansai, Chūgoku Shikoku, Kyūshū and Okinawa.

Hokkaidō

Average monthly precipitation in August
Days Place Inches Milli­metres
9 Abashiri 4.0 101
10 Asahikawa 5.3 134
9 Hakodate 6.1 154
9 Obihiro 5.5 139
9 Sapporo 4.9 124
11 Tomakomai 8.1 205
9 Wakkanai 4.6 116

Tōhoku

August averages for total rainfall
Days Place Inches Milli­metres
10 Aomori 4.8 123
10 Fukushima 6.1 154
8 Iwaki 5.3 136
11 Morioka 7.2 184
11 Sendai 6.6 167

Kantō

Average amount of rain in August
Days Place Inches Milli­metres
7 Chiba 5.3 134
11 Hachijo-jima Island 7.1 179
12 Maebashi 8.0 202
15 Nikko 15.5 394
8 Tokyo 6.6 168
11 Utsunomiya 8.3 210
8 Yokohama 6.5 165

Chūbu

Precipitation totals for August
Days Place Inches Milli­metres
8 Aikawa, Sado Island 4.9 125
9 Gifu 5.9 149
8 Hamamatsu 5.9 151
9 Kanazawa 5.5 139
9 Nagano 3.9 98
8 Nagoya 5.0 126
9 Niigata 5.5 141
10 Shizuoka 9.9 251

Kansai

August rainfall averages
Days Place Inches Milli­metres
7 Himeji 3.8 96
6 Kobe 3.6 91
8 Kyoto 5.2 132
8 Nara 4.4 112
7 Osaka 3.6 91
9 Tsu 5.4 137
6 Wakayama 3.4 86

Chūgoku

Total rainfall in August
Days Place Inches Milli­metres
6 Fukuyama 3.3 83
7 Hiroshima 4.4 111
6 Kure 3.8 97
9 Matsue 4.5 114
6 Okayama 3.4 87
9 Tottori 4.6 117
9 Yamaguchi 6.8 172

Shikoku

Average August rainfall
Days Place Inches Milli­metres
11 Kochi 11.1 283
7 Matsuyama 3.5 90
7 Takamatsu 3.4 86
8 Tokushima 6.8 173

Kyūshū

Total precipitation during August
Days Place Inches Milli­metres
9 Fukuoka 6.8 172
11 Kagoshima 8.8 223
10 Kumamoto 6.8 174
13 Miyazaki 11.4 290
9 Nagasaki 7.7 195
9 Oita 6.8 172
9 Wadomari, Okinoerabu Island 7.1 179
13 Yakushima Island Airport 10.6 269

Okinawa

Amount of rain in August
Days Place Inches Milli­metres
12 Iriomote Island 10.8 274
12 Ishigaki Island 10.3 262
10 Kume 7.2 182
11 Miyakojima 10.3 263
13 Nago 9.8 248
12 Naha 9.5 241
10 Yonaguni Island 8.4 213
Reference

Japan Meteorological Agency. Historical weather data retrieval.

Japan Precipitation
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