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Weather & Climate in Yamaga, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Yamaga enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 38°F in January while summers reach 77°F in July. The area gets 197 sunny days per year. Annual precipitation totals 82.2 inches (wetter than the 38-inch national average). The city sits at an elevation of 115 feet.
Temperature
38°F Jan (3°C)
77°F Jul (25°C)
| Annual Average | 57.9°F |
| 7% above US avg | |
| January Average | 38°F (3°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 197 days/yr |
Geography
| Elevation | 115 ft (35 m) |
| Area | 115.7 sq mi (299.7 km²) |
| Population Density | 424/sq mi |
| Coordinates | 33.0167°N, 130.6891°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
350 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.0.
| Apr 15, 2016 | 6 km ESE of Kumamoto, Japan | M7.0 | 26 km | 10 km |
| Dec 2, 1996 | 17 km SW of Miyazaki, Japan | M6.7 | 149 km | 49 km |
| Oct 19, 1996 | 5 km SE of Miyazaki, Japan | M6.7 | 146 km | 22 km |
| Mar 20, 2005 | 28 km NNW of Maebaru-ch??, Japan | M6.6 | 102 km | 10 km |
| Jan 21, 2022 | 27 km SSE of Saiki, Japan | M6.3 | 130 km | 39 km |
| Mar 13, 2014 | 32 km SSW of Hikari, Japan | M6.3 | 129 km | 79 km |
| Jun 11, 2006 | 15 km S of Tsukawaki, Japan | M6.3 | 44 km | 140 km |
| Apr 14, 2016 | 2 km SSE of Kumamoto, Japan | M6.2 | 26 km | 9 km |
| May 13, 1997 | 1 km WNW of Satsumasendai, Japan | M6.1 | 138 km | 33 km |
| Mar 26, 1997 | 16 km NE of Satsumasendai, Japan | M6.1 | 124 km | 10 km |
| Apr 14, 2016 | 5 km ENE of Uto, Japan | M6.0 | 36 km | 8 km |
| Apr 5, 2009 | 10 km N of Miyazaki, Japan | M5.8 | 131 km | 26 km |
| Oct 19, 1996 | 19 km ENE of Miyazaki, Japan | M5.7 | 146 km | 33 km |
| Apr 15, 2016 | 6 km S of Kikuchi, Japan | M5.7 | 15 km | 10 km |
| Apr 25, 2001 | 18 km SE of Saiki, Japan | M5.7 | 126 km | 33 km |
| Apr 18, 2016 | 8 km NNE of Aso, Japan | M5.5 | 38 km | 10 km |
| Apr 15, 2016 | 10 km NE of Aso, Japan | M5.5 | 44 km | 13 km |
| Apr 2, 1997 | 19 km W of Satsumasendai, Japan | M5.5 | 144 km | 10 km |
| May 22, 1998 | 9 km NE of Bungo-Takada-shi, Japan | M5.5 | 102 km | 81 km |
| Apr 19, 2005 | 8 km NNW of Maebaru-ch??, Japan | M5.5 | 84 km | 19 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
64 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Shanshan | Category 2 | 104 mph | 68 km |
| 2022 | Nanmadol | Category 3 | 104 mph | 34 km |
| 2022 | Hinnamnor | Category 1 | 81 mph | 274 km |
| 2020 | Haishen | Category 2 | 98 mph | 148 km |
| 2020 | Maysak | Category 2 | 92 mph | 257 km |
| 2019 | Francisco | Category 1 | 81 mph | 15 km |
| 2018 | Jebi | Category 3 | 98 mph | 299 km |
| 2018 | Trami | Category 1 | 98 mph | 213 km |
| 2018 | Prapiroon | Category 1 | 75 mph | 163 km |
| 2017 | Noru | Category 1 | 69 mph | 203 km |
| 2016 | Malakas | Category 3 | 109 mph | 175 km |
| 2016 | Chaba | Category 1 | 75 mph | 285 km |
| 2016 | Namtheun | Category 1 | 69 mph | 258 km |
| 2015 | Goni | Category 3 | 104 mph | 36 km |
| 2014 | Halong | Category 1 | 86 mph | 230 km |
| 2013 | Danas | Category 1 | 75 mph | 217 km |
| 2012 | Sanba | Category 3 | 104 mph | 260 km |
| 2012 | Damrey | Category 1 | 63 mph | 295 km |
| 2011 | Ma-on | Category 1 | 86 mph | 222 km |
| 2007 | Usagi | Category 3 | 104 mph | 76 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
14 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 | 47 km |
| 1596 | BEPPU BAY, KYUSHU | Eruption + Earthquake | 8.0 m | 708 | 99 km |
| 1769 | SW. KYUSHU ISLAND | Earthquake | 2.5 m | — | 146 km |
| 1939 | SEIKAIDO | Earthquake | 0.8 m | 1 | 146 km |
| 1996 | KYUSHU ISLAND | Earthquake | 0.6 m | — | 146 km |
| 1970 | SEIKAIDO | Earthquake | 0.3 m | — | 131 km |
| 1996 | SEA OF JAPAN | Earthquake | 0.2 m | — | 149 km |
| 1984 | KYUSHU, JAPAN | Earthquake | 0.2 m | — | 137 km |
| 1828 | AMAKUSA SEA | Earthquake | — | — | 87 km |
| 1715 | SEIKAIDO | Earthquake | — | — | 99 km |
| 1698 | SEIKAIDO-NANKAIDO | Earthquake | — | — | 99 km |
| 1619 | YATSUSHIRO, JAPAN | Earthquake | — | — | 58 km |
| 1597 | BEPPU BAY, JAPAN | Eruption + Earthquake | — | 40 | 91 km |
| 744 | SW. KYUSHU ISLAND | Earthquake | — | 1,520 | 71 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
9 volcanoes within 200 km. Closest: Asosan (41 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Asosan | Caldera | 1,592 m (5,223 ft) | 2020 | 41 km |
| Unzendake | Complex | 1,483 m (4,865 ft) | 1996 | 46 km |
| Kujusan | Stratovolcano(es) | 1,791 m (5,876 ft) | 1996 | 53 km |
| Yufu-Tsurumi | Lava dome(s) | 1,584 m (5,197 ft) | 867 | 72 km |
| Kirishimayama | Shield | 1,700 m (5,577 ft) | 2018 | 122 km |
| Yonemaru-Sumiyoshiike | Maar(s) | 40 m (131 ft) | -6200 | 139 km |
| Aira | Caldera | 1,117 m (3,665 ft) | 2020 | 158 km |
| Fukue | Shield(s) | 315 m (1,033 ft) | -400 | 177 km |
| Abu | Shield(s) | 641 m (2,103 ft) | -6850 | 185 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 38°F (3°C) | 2.7 in | Coldest |
| February | 40°F (4°C) | 3.5 in | |
| March | 46°F (8°C) | 5.2 in | |
| April | 55°F (13°C) | 6.7 in | |
| May | 63°F (17°C) | 7.9 in | |
| June | 70°F (21°C) | 15.0 in | |
| July | 77°F (25°C) | 15.8 in | Wettest |
| August | 78°F (26°C) | 8.4 in | Warmest |
| September | 72°F (22°C) | 7.7 in | |
| October | 62°F (17°C) | 4.1 in | |
| November | 52°F (11°C) | 2.9 in | |
| December | 42°F (6°C) | 2.3 in | Driest |
Yamaga has a seasonal temperature swing of 40°F / from 38°F in January to 78°F in August. Total annual precipitation is 82.2 inches, with July being the wettest month (15.8") and December the driest (2.3").