Average Annual Precipitation for Japan





The tables below give yearly averages for rainfall plus snowfall at cities and towns throughout Japan.

Each place has a total for how many days of wet weather it usually gets a year 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).

These annual precipitation 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 yearly precipitation
Days Place Inches Milli­metres
117 Abashiri 31.0 788
157 Asahikawa 41.0 1042
133 Hakodate 45.3 1152
86 Obihiro 35.0 888
140 Sapporo 43.6 1107
109 Tomakomai 47.2 1198
152 Wakkanai 41.8 1063

Tōhoku

Annual averages for rainfall plus snowfall
Days Place Inches Milli­metres
162 Aomori 51.2 1300
103 Fukushima 45.9 1166
102 Iwaki 55.5 1409
127 Morioka 49.8 1266
99 Sendai 49.4 1254

Kantō

Average amount of rain and snow a year
Days Place Inches Milli­metres
104 Chiba 54.6 1387
161 Hachijo-jima Island 126.1 3202
102 Maebashi 49.2 1249
131 Nikko 85.7 2176
101 Tokyo 60.2 1529
109 Utsunomiya 58.8 1493
105 Yokohama 66.5 1689

Chūbu

Average annual precipitation
Days Place Inches Milli­metres
157 Aikawa, Sado Island 59.3 1506
113 Gifu 71.9 1828
103 Hamamatsu 71.2 1809
177 Kanazawa 94.4 2399
108 Nagano 36.7 933
103 Nagoya 60.4 1535
172 Niigata 71.7 1821
107 Shizuoka 91.5 2325

Kansai

Average annual precipitation
Days Place Inches Milli­metres
93 Himeji 47.2 1199
93 Kobe 47.9 1216
104 Kyoto 58.7 1491
106 Nara 51.8 1316
98 Osaka 50.4 1279
101 Tsu 62.3 1581
96 Wakayama 51.8 1317

Chūgoku

Average amount of precipitation a year
Days Place Inches Milli­metres
88 Fukuyama 44.0 1117
95 Hiroshima 60.5 1538
90 Kure 54.4 1381
151 Matsue 70.4 1787
88 Okayama 43.5 1106
159 Tottori 75.4 1914
115 Yamaguchi 74.3 1887

Shikoku

Annual precipitation totals
Days Place Inches Milli­metres
109 Kochi 100.3 2548
100 Matsuyama 51.8 1315
97 Takamatsu 42.6 1082
98 Tokushima 57.2 1454

Kyūshū

Total annual precipitation
Days Place Inches Milli­metres
111 Fukuoka 63.5 1612
120 Kagoshima 89.2 2266
110 Kumamoto 78.2 1986
116 Miyazaki 98.8 2509
110 Nagasaki 73.1 1858
97 Oita 64.7 1645
119 Wadomari, Okinoerabu Island 72.3 1836
163 Yakushima Island Airport 176.3 4477

Okinawa

Average yearly precipitation
Days Place Inches Milli­metres
141 Iriomote Island 90.7 2305
123 Ishigaki Island 82.9 2107
128 Kume 83.1 2112
127 Miyakojima 79.6 2021
132 Nago 79.5 2019
122 Naha 80.3 2041
147 Yonaguni Island 92.7 2354
Reference

Japan Meteorological Agency. Historical weather data retrieval.

Japan Precipitation
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