All Countries
Weather & Climate in Ijūin, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ijūin enjoys a temperate climate with an average annual temperature of 62°F (16°C). Winters average 43°F in January while summers reach 79°F in July. The area gets 179 sunny days per year. Annual precipitation totals 90.8 inches (wetter than the 38-inch national average). The city sits at an elevation of 305 feet.
Temperature
43°F Jan (6°C)
79°F Jul (26°C)
| Annual Average | 61.6°F |
| 14% above US avg | |
| January Average | 43°F (6°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 179 days/yr |
Geography
| Elevation | 305 ft (93 m) |
| Area | 316.1 sq mi (818.7 km²) |
| Population Density | 80/sq mi |
| Coordinates | 31.6167°N, 130.4000°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
668 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.1.
| Aug 8, 2024 | 2024 Hyuganada Sea, Japan Earthquake | M7.1 | 106 km | 24 km |
| Apr 15, 2016 | 6 km ESE of Kumamoto, Japan | M7.0 | 135 km | 10 km |
| Jan 13, 2025 | 15 km SE of Miyazaki, Japan | M6.8 | 112 km | 39 km |
| Oct 19, 1996 | 5 km SE of Miyazaki, Japan | M6.7 | 105 km | 22 km |
| Dec 2, 1996 | 17 km SW of Miyazaki, Japan | M6.7 | 89 km | 49 km |
| Oct 18, 1996 | 20 km SSE of Nishinoomote, Japan | M6.6 | 134 km | 10 km |
| Jan 24, 1999 | 15 km SSE of Nishinoomote, Japan | M6.4 | 129 km | 33 km |
| Jan 8, 2019 | 16 km SSE of Nishinoomote, Japan | M6.3 | 130 km | 35 km |
| Apr 14, 2016 | 2 km SSE of Kumamoto, Japan | M6.2 | 133 km | 9 km |
| Sep 3, 2009 | 32 km WSW of Makurazaki, Japan | M6.2 | 64 km | 163 km |
| May 9, 2019 | 43 km ESE of Miyazaki, Japan | M6.2 | 138 km | 22 km |
| Apr 2, 2025 | 56 km ENE of Nishinoomote, Japan | M6.1 | 128 km | 29 km |
| May 13, 1997 | 1 km WNW of Satsumasendai, Japan | M6.1 | 26 km | 33 km |
| Mar 26, 1997 | 16 km NE of Satsumasendai, Japan | M6.1 | 34 km | 10 km |
| Apr 14, 2016 | 5 km ENE of Uto, Japan | M6.0 | 124 km | 8 km |
| Dec 16, 1998 | 22 km S of Kushima, Japan | M6.0 | 92 km | 42 km |
| Jun 25, 2000 | 33 km S of Kushima, Japan | M6.0 | 90 km | 10 km |
| May 3, 2020 | 139 km WSW of Kushikino, Japan | M5.9 | 150 km | 10 km |
| Apr 30, 1994 | 8 km SSE of Kushima, Japan | M5.9 | 87 km | 26 km |
| Sep 23, 1992 | 17 km SSW of Makurazaki, Japan | M5.8 | 57 km | 161 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
74 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 | 30 km |
| 2022 | Nanmadol | Category 3 | 109 mph | 23 km |
| 2020 | Haishen | Category 3 | 104 mph | 117 km |
| 2020 | Maysak | Category 2 | 92 mph | 287 km |
| 2019 | Francisco | Category 1 | 81 mph | 107 km |
| 2018 | Jebi | Category 3 | 98 mph | 270 km |
| 2018 | Trami | Category 2 | 98 mph | 133 km |
| 2018 | Soulik | Category 2 | 98 mph | 272 km |
| 2018 | Prapiroon | Category 1 | 75 mph | 210 km |
| 2017 | Noru | Category 1 | 81 mph | 110 km |
| 2016 | Malakas | Category 3 | 109 mph | 47 km |
| 2016 | Namtheun | Category 2 | 81 mph | 103 km |
| 2015 | Goni | Category 3 | 104 mph | 38 km |
| 2014 | Phanfone | Category 3 | 98 mph | 207 km |
| 2014 | Halong | Category 1 | 86 mph | 202 km |
| 2013 | Danas | Category 1 | 75 mph | 290 km |
| 2012 | Sanba | Category 3 | 104 mph | 248 km |
| 2012 | Damrey | Category 1 | 63 mph | 172 km |
| 2012 | Guchol | Category 1 | 81 mph | 248 km |
| 2011 | Ma-on | Category 1 | 86 mph | 228 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
17 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 | 126 km |
| 1780 | SW. KYUSHU ISLAND | Astronomical | 6.0 m | - | 29 km |
| 1914 | SEIKAIDO | Eruption | 3.0 m | 63 | 26 km |
| 1961 | SEIKAIDO | Earthquake | 0.7 m | 2 | 133 km |
| 1996 | KYUSHU ISLAND | Earthquake | 0.6 m | - | 105 km |
| 2024 | HYUGANADA SEA | Earthquake | 0.5 m | - | 107 km |
| 1970 | SEIKAIDO | Earthquake | 0.3 m | - | 139 km |
| 2025 | HYUGANADA SEA | Earthquake | 0.2 m | - | 112 km |
| 1996 | SEA OF JAPAN | Earthquake | 0.2 m | - | 89 km |
| 1996 | KYUSHU ISLAND | Earthquake | 0.2 m | - | 134 km |
| 1987 | KYUSHU ISLAND | Earthquake | 0.0 m | 2 | 144 km |
| 1828 | AMAKUSA SEA | Earthquake | - | - | 119 km |
| 1781 | SW. KYUSHU ISLAND | Astronomical | - | 38 | 26 km |
| 1780 | SW. KYUSHU ISLAND | Astronomical | - | - | 29 km |
| 1619 | YATSUSHIRO, JAPAN | Earthquake | - | - | 100 km |
| 766 | N. KAGOSHIMA BAY | Astronomical | - | - | 29 km |
| 744 | SW. KYUSHU ISLAND | Earthquake | - | 1,520 | 88 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
11 volcanoes within 200 km. Closest: Aira (25 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Aira | Caldera | 1,117 m (3,665 ft) | 2020 | 25 km |
| Yonemaru-Sumiyoshiike | Maar(s) | 40 m (131 ft) | -6200 | 25 km |
| Ata | Caldera(s) | 924 m (3,031 ft) | 885 | 47 km |
| Kirishimayama | Shield | 1,700 m (5,577 ft) | 2018 | 56 km |
| Kikai | Caldera | 704 m (2,310 ft) | 2020 | 92 km |
| Unzendake | Complex | 1,483 m (4,865 ft) | 1996 | 128 km |
| Kuchinoerabujima | Stratovolcano(es) | 657 m (2,156 ft) | 2020 | 132 km |
| Asosan | Caldera | 1,592 m (5,223 ft) | 2020 | 156 km |
| Kujusan | Stratovolcano(es) | 1,791 m (5,876 ft) | 1996 | 182 km |
| Fukue | Shield(s) | 315 m (1,033 ft) | -400 | 186 km |
| Kuchinoshima | Stratovolcano(es) | 628 m (2,060 ft) | 1190 | 189 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 3.5 in | Coldest |
| February | 45°F (7°C) | 4.3 in | |
| March | 51°F (10°C) | 6.4 in | |
| April | 59°F (15°C) | 8.7 in | |
| May | 66°F (19°C) | 9.7 in | |
| June | 72°F (22°C) | 16.7 in | Wettest |
| July | 79°F (26°C) | 12.9 in | |
| August | 80°F (27°C) | 8.9 in | Warmest |
| September | 75°F (24°C) | 8.5 in | |
| October | 66°F (19°C) | 4.4 in | |
| November | 56°F (14°C) | 3.6 in | |
| December | 47°F (8°C) | 3.2 in | Driest |
Ijūin has a seasonal temperature swing of 37°F / from 43°F in January to 80°F in August. Total annual precipitation is 90.8 inches, with June being the wettest month (16.7") and December the driest (3.2").