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Weather & Climate in Isen, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Isen has a warm climate with an average annual temperature of 71°F (22°C). Winters average 58°F in January while summers reach 83°F in July. The area gets 173 sunny days per year. Annual precipitation totals 90.0 inches (wetter than the 38-inch national average). The city sits at an elevation of 253 feet.
Temperature
58°F Jan (15°C)
83°F Jul (28°C)
| Annual Average | 70.7°F |
| 31% above US avg | |
| January Average | 58°F (15°C) |
| July Average | 83°F (28°C) |
| Sunny Days | 173 days/yr |
Geography
| Elevation | 253 ft (77 m) |
| Area | 467.0 sq mi (1,209.6 km²) |
| Population Density | 14/sq mi |
| Coordinates | 27.6761°N, 128.9372°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
873 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.1.
| Oct 18, 1995 | 83 km SE of Naze, Japan | M7.1 | 125 km | 28 km |
| Oct 19, 1995 | 71 km ESE of Naze, Japan | M6.8 | 128 km | 20 km |
| Jun 13, 2020 | 130 km WNW of Naze, Japan | M6.6 | 147 km | 165 km |
| Oct 19, 1995 | 69 km ESE of Naze, Japan | M6.3 | 132 km | 33 km |
| Dec 8, 2001 | 15 km SE of Naze, Japan | M6.2 | 89 km | 33 km |
| Oct 18, 1995 | 73 km ESE of Naze, Japan | M6.1 | 138 km | 28 km |
| Jul 22, 2004 | 91 km E of Nago, Japan | M6.1 | 132 km | 21 km |
| Jun 16, 1990 | 153 km N of Nago, Japan | M6.0 | 101 km | 27 km |
| Jul 8, 2008 | 107 km NNE of Nago, Japan | M6.0 | 62 km | 43 km |
| Jun 4, 1992 | 145 km WSW of Naze, Japan | M6.0 | 95 km | 17 km |
| May 27, 2016 | 165 km SSE of Naze, Japan | M5.9 | 141 km | 10 km |
| Sep 28, 2009 | 146 km N of Nago, Japan | M5.8 | 113 km | 9 km |
| Jun 2, 1996 | 102 km NNE of Nago, Japan | M5.8 | 53 km | 42 km |
| Apr 20, 2007 | 102 km NNE of Nago, Japan | M5.7 | 60 km | 42 km |
| Sep 27, 2003 | 118 km WNW of Naze, Japan | M5.7 | 139 km | 10 km |
| Aug 16, 1995 | 139 km W of Naze, Japan | M5.7 | 122 km | 21 km |
| Sep 26, 2016 | 110 km NNE of Nago, Japan | M5.7 | 43 km | 38 km |
| Oct 19, 1995 | 79 km SE of Naze, Japan | M5.7 | 104 km | 29 km |
| Aug 3, 2014 | 143 km WSW of Naze, Japan | M5.7 | 95 km | 10 km |
| Nov 1, 1995 | 59 km ESE of Naze, Japan | M5.7 | 123 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
98 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Shanshan | Category 4 | 109 mph | 169 km |
| 2024 | Bebinca | Category 1 | 86 mph | 159 km |
| 2023 | Khanun | Category 4 | 109 mph | 280 km |
| 2022 | Nanmadol | Category 4 | 115 mph | 258 km |
| 2022 | Hinnamnor | Category 4 | 121 mph | 229 km |
| 2020 | Haishen | Category 4 | 115 mph | 154 km |
| 2020 | Maysak | Category 4 | 109 mph | 271 km |
| 2020 | Bavi | Category 2 | 86 mph | 241 km |
| 2019 | Neoguri | Category 1 | 75 mph | 264 km |
| 2018 | Soulik | Category 3 | 98 mph | 170 km |
| 2018 | Trami | Category 2 | 98 mph | 55 km |
| 2018 | Prapiroon | Category 1 | 75 mph | 171 km |
| 2017 | Saola | Category 1 | 69 mph | 19 km |
| 2017 | Noru | Category 1 | 86 mph | 227 km |
| 2016 | Chaba | Category 5 | 132 mph | 264 km |
| 2016 | Malakas | Category 3 | 109 mph | 263 km |
| 2016 | Namtheun | Category 3 | 81 mph | 180 km |
| 2015 | Goni | Category 4 | 115 mph | 140 km |
| 2015 | Halola | Category 1 | 81 mph | 195 km |
| 2014 | Phanfone | Category 4 | 109 mph | 235 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
5 tsunamis recorded within 500 km. Highest wave on record: 2.6 m (8 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1995 | RYUKYU ISLANDS | Earthquake | 2.6 m | - | 125 km |
| 1995 | RYUKYU ISLANDS | Eruption + Earthquake | 1.5 m | - | 128 km |
| 1901 | RYUKYU ISLANDS | Earthquake | 0.3 m | - | 139 km |
| 1911 | RYUKYU ISLANDS | Earthquake | - | 12 | 111 km |
| 1664 | TORISHIMA, RYUKYU ISLANDS | Astronomical | - | - | 70 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Io-Torishima (74 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Io-Torishima | Complex | 212 m (696 ft) | 1968 | 74 km |
| Yokoate-jima | Stratovolcano(es) | 495 m (1,624 ft) | 1835 | 125 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 58°F (15°C) | 5.1 in | Coldest |
| February | 59°F (15°C) | 5.5 in | |
| March | 63°F (17°C) | 6.6 in | |
| April | 68°F (20°C) | 9.0 in | |
| May | 73°F (23°C) | 10.6 in | |
| June | 78°F (25°C) | 12.4 in | Wettest |
| July | 83°F (28°C) | 8.1 in | Warmest |
| August | 82°F (28°C) | 8.4 in | |
| September | 80°F (27°C) | 6.8 in | |
| October | 75°F (24°C) | 6.6 in | |
| November | 69°F (20°C) | 6.5 in | |
| December | 62°F (17°C) | 4.7 in | Driest |
Isen has a seasonal temperature swing of 24°F / from 58°F in January to 83°F in July. Total annual precipitation is 90.0 inches, with June being the wettest month (12.4") and December the driest (4.7").