Average Annual Precipitation for Japan

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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.

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