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Weather & Climate in Amakusa, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Amakusa enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 42°F in January while summers reach 79°F in July. The area gets 194 sunny days per year. Annual precipitation totals 82.1 inches (wetter than the 38-inch national average). The city sits at an elevation of 20 feet.
Temperature
42°F Jan (6°C)
79°F Jul (26°C)
| Annual Average | 60.9°F |
| 13% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 194 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 1,727.4 sq mi (4,474.0 km²) |
| Population Density | 48/sq mi |
| Coordinates | 32.4586°N, 130.1931°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
362 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.1.
| Aug 8, 2024 | 2024 Hyuganada Sea, Japan Earthquake | M7.1 | 146 km | 24 km |
| Apr 15, 2016 | 6 km ESE of Kumamoto, Japan | M7.0 | 64 km | 10 km |
| Jan 13, 2025 | 15 km SE of Miyazaki, Japan | M6.8 | 146 km | 39 km |
| Oct 19, 1996 | 5 km SE of Miyazaki, Japan | M6.7 | 136 km | 22 km |
| Dec 2, 1996 | 17 km SW of Miyazaki, Japan | M6.7 | 129 km | 49 km |
| Mar 20, 2005 | 28 km NNW of Maebaru-ch??, Japan | M6.6 | 150 km | 10 km |
| Jun 11, 2006 | 15 km S of Tsukawaki, Japan | M6.3 | 116 km | 140 km |
| Sep 3, 2009 | 32 km WSW of Makurazaki, Japan | M6.2 | 148 km | 163 km |
| Apr 14, 2016 | 2 km SSE of Kumamoto, Japan | M6.2 | 60 km | 9 km |
| Mar 26, 1997 | 16 km NE of Satsumasendai, Japan | M6.1 | 64 km | 10 km |
| May 13, 1997 | 1 km WNW of Satsumasendai, Japan | M6.1 | 71 km | 33 km |
| Apr 14, 2016 | 5 km ENE of Uto, Japan | M6.0 | 56 km | 8 km |
| Apr 5, 2009 | 10 km N of Miyazaki, Japan | M5.8 | 126 km | 26 km |
| Sep 23, 1992 | 17 km SSW of Makurazaki, Japan | M5.8 | 148 km | 161 km |
| Oct 19, 1996 | 19 km ENE of Miyazaki, Japan | M5.7 | 145 km | 33 km |
| Apr 15, 2016 | 6 km S of Kikuchi, Japan | M5.7 | 78 km | 10 km |
| Apr 15, 2016 | 10 km NE of Aso, Japan | M5.5 | 109 km | 13 km |
| Apr 2, 1997 | 19 km W of Satsumasendai, Japan | M5.5 | 71 km | 10 km |
| Apr 19, 2005 | 8 km NNW of Maebaru-ch??, Japan | M5.5 | 131 km | 19 km |
| Apr 18, 2016 | 8 km NNE of Aso, Japan | M5.5 | 105 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
70 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Shanshan | Category 3 | 109 mph | 11 km |
| 2022 | Nanmadol | Category 3 | 104 mph | 25 km |
| 2022 | Hinnamnor | Category 2 | 86 mph | 274 km |
| 2020 | Haishen | Category 3 | 104 mph | 112 km |
| 2020 | Maysak | Category 2 | 92 mph | 230 km |
| 2019 | Francisco | Category 1 | 81 mph | 62 km |
| 2018 | Trami | Category 2 | 98 mph | 200 km |
| 2018 | Prapiroon | Category 1 | 75 mph | 154 km |
| 2017 | Noru | Category 1 | 75 mph | 195 km |
| 2016 | Malakas | Category 3 | 109 mph | 143 km |
| 2016 | Chaba | Category 1 | 81 mph | 290 km |
| 2016 | Namtheun | Category 1 | 75 mph | 187 km |
| 2015 | Goni | Category 3 | 104 mph | 12 km |
| 2014 | Phanfone | Category 2 | 98 mph | 293 km |
| 2014 | Halong | Category 1 | 86 mph | 253 km |
| 2013 | Danas | Category 3 | 92 mph | 210 km |
| 2012 | Sanba | Category 3 | 104 mph | 216 km |
| 2012 | Damrey | Category 1 | 63 mph | 218 km |
| 2011 | Ma-on | Category 1 | 86 mph | 255 km |
| 2007 | Usagi | Category 3 | 104 mph | 132 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
13 tsunamis recorded within 500 km. Highest wave on record: 55.0 m (180 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1792 | SHIMABARA BAY, KYUSHU ISLAND | Landslide | 55.0 m | 15,000 | 34 km |
| 1780 | SW. KYUSHU ISLAND | Astronomical | 6.0 m | — | 107 km |
| 1914 | SEIKAIDO | Eruption | 3.0 m | 63 | 108 km |
| 1996 | KYUSHU ISLAND | Earthquake | 0.6 m | — | 136 km |
| 1970 | SEIKAIDO | Earthquake | 0.3 m | — | 145 km |
| 2025 | HYUGANADA SEA | Earthquake | 0.2 m | — | 148 km |
| 1996 | SEA OF JAPAN | Earthquake | 0.2 m | — | 129 km |
| 1828 | AMAKUSA SEA | Earthquake | — | — | 32 km |
| 1781 | SW. KYUSHU ISLAND | Astronomical | — | 38 | 108 km |
| 1780 | SW. KYUSHU ISLAND | Astronomical | — | — | 107 km |
| 1619 | YATSUSHIRO, JAPAN | Earthquake | — | — | 38 km |
| 766 | N. KAGOSHIMA BAY | Astronomical | — | — | 107 km |
| 744 | SW. KYUSHU ISLAND | Earthquake | — | 1,520 | 30 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
10 volcanoes within 200 km. Closest: Unzendake (35 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Unzendake | Complex | 1,483 m (4,865 ft) | 1996 | 35 km |
| Yonemaru-Sumiyoshiike | Maar(s) | 40 m (131 ft) | -6200 | 85 km |
| Kirishimayama | Shield | 1,700 m (5,577 ft) | 2018 | 86 km |
| Asosan | Caldera | 1,592 m (5,223 ft) | 2020 | 98 km |
| Aira | Caldera | 1,117 m (3,665 ft) | 2020 | 106 km |
| Kujusan | Stratovolcano(es) | 1,791 m (5,876 ft) | 1996 | 121 km |
| Fukue | Shield(s) | 315 m (1,033 ft) | -400 | 128 km |
| Ata | Caldera(s) | 924 m (3,031 ft) | 885 | 142 km |
| Yufu-Tsurumi | Lava dome(s) | 1,584 m (5,197 ft) | 867 | 145 km |
| Kikai | Caldera | 704 m (2,310 ft) | 2020 | 186 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 3.2 in | Coldest |
| February | 44°F (7°C) | 3.7 in | |
| March | 49°F (10°C) | 5.6 in | |
| April | 58°F (15°C) | 7.1 in | |
| May | 65°F (18°C) | 8.2 in | |
| June | 72°F (22°C) | 15.0 in | Wettest |
| July | 79°F (26°C) | 13.9 in | |
| August | 80°F (27°C) | 7.8 in | Warmest |
| September | 74°F (24°C) | 7.7 in | |
| October | 65°F (19°C) | 3.9 in | |
| November | 56°F (13°C) | 3.3 in | |
| December | 47°F (8°C) | 2.8 in | Driest |
Amakusa has a seasonal temperature swing of 38°F / from 42°F in January to 80°F in August. Total annual precipitation is 82.1 inches, with June being the wettest month (15.0") and December the driest (2.8").