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Weather & Climate in Okugano, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Okugano experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 36°F in January while summers reach 74°F in July. The area gets 195 sunny days per year. Annual precipitation totals 78.0 inches (wetter than the 38-inch national average). The city sits at an elevation of 1,512 feet.
Temperature
36°F Jan (2°C)
74°F Jul (24°C)
| Annual Average | 55.1°F |
| 2% above US avg | |
| January Average | 36°F (2°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 195 days/yr |
Geography
| Elevation | 1,512 ft (461 m) |
| Area | 136.4 sq mi (353.1 km²) |
| Population Density | 45/sq mi |
| Coordinates | 34.4167°N, 131.8333°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
125 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.8.
| Mar 24, 2001 | 16 km SSW of Kure, Japan | M6.8 | 74 km | 50 km |
| Apr 17, 2024 | 18 km W of Uwajima, Japan | M6.3 | 139 km | 32 km |
| Mar 13, 2014 | 32 km SSW of Hikari, Japan | M6.3 | 82 km | 79 km |
| Jun 25, 1997 | 17 km E of Hagi, Japan | M5.9 | 21 km | 10 km |
| Apr 8, 2018 | 8 km NNE of ?dach?-?da, Japan | M5.7 | 114 km | 10 km |
| May 22, 1998 | 9 km NE of Bungo-Takada-shi, Japan | M5.5 | 93 km | 81 km |
| Oct 8, 2000 | 32 km N of Sh?bara, Japan | M5.4 | 137 km | 10 km |
| Oct 28, 1991 | 13 km SSW of Ube, Japan | M5.2 | 86 km | 17 km |
| Jul 17, 2021 | 29 km NE of Kitsuki, Japan | M5.2 | 89 km | 64 km |
| Mar 25, 2001 | 22 km WNW of H?j?, Japan | M5.2 | 79 km | 43 km |
| Apr 15, 2016 | 11 km WSW of Beppu, Japan | M5.1 | 136 km | 10 km |
| Apr 2, 1997 | 34 km WSW of ?zu, Japan | M5.1 | 123 km | 46 km |
| Aug 14, 1993 | 19 km SW of ?zu, Japan | M5.0 | 128 km | 41 km |
| Jan 3, 1991 | 22 km W of ?zu, Japan | M5.0 | 112 km | 63 km |
| Jun 3, 2011 | 9 km ENE of G?tsuch?, Japan | M5.0 | 81 km | 10 km |
| Aug 15, 2016 | 26 km ENE of Kitsuki, Japan | M4.9 | 105 km | 72 km |
| Jan 9, 2001 | 40 km W of ?zu, Japan | M4.9 | 98 km | 49 km |
| Mar 8, 2020 | 28 km NE of Usuki, Japan | M4.9 | 122 km | 58 km |
| Jul 1, 2016 | 17 km NE of Kitsuki, Japan | M4.9 | 99 km | 79 km |
| Feb 26, 2024 | 18 km N of Yawatahama, Japan | M4.9 | 103 km | 42 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
47 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Shanshan | Category 1 | 86 mph | 256 km |
| 2022 | Nanmadol | Category 1 | 86 mph | 146 km |
| 2022 | Hinnamnor | Category 1 | 81 mph | 252 km |
| 2020 | Haishen | Category 2 | 98 mph | 254 km |
| 2020 | Maysak | Category 1 | 86 mph | 293 km |
| 2019 | Francisco | Category 1 | 81 mph | 204 km |
| 2018 | Jebi | Category 3 | 98 mph | 259 km |
| 2018 | Trami | Category 1 | 92 mph | 259 km |
| 2018 | Cimaron | Category 1 | 92 mph | 264 km |
| 2018 | Prapiroon | Category 1 | 69 mph | 252 km |
| 2017 | Noru | Category 1 | 69 mph | 231 km |
| 2016 | Malakas | Category 1 | 86 mph | 237 km |
| 2015 | Goni | Category 3 | 98 mph | 106 km |
| 2015 | Nangka | Category 1 | 81 mph | 277 km |
| 2014 | Halong | Category 1 | 81 mph | 208 km |
| 2011 | Ma-on | Category 1 | 86 mph | 229 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 299 km |
| 2007 | Usagi | Category 2 | 92 mph | 60 km |
| 2007 | Man-yi | Category 1 | 81 mph | 211 km |
| 2006 | Shanshan | Category 1 | 92 mph | 140 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
6 tsunamis recorded within 500 km. Highest wave on record: 10.0 m (33 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1026 | OFF MASUDA, SHIMANE PREFECTURE | Earthquake | 10.0 m | 1,001 | 43 km |
| 1596 | BEPPU BAY, KYUSHU | Eruption + Earthquake | 8.0 m | 708 | 125 km |
| 1872 | SW. HONSHU ISLAND | Earthquake | 3.0 m | 804 | 56 km |
| 1715 | SEIKAIDO | Earthquake | - | - | 125 km |
| 1698 | SEIKAIDO-NANKAIDO | Earthquake | - | - | 125 km |
| 1597 | BEPPU BAY, JAPAN | Eruption + Earthquake | - | 40 | 126 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Abu (23 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Abu | Shield(s) | 641 m (2,103 ft) | -6850 | 23 km |
| Sanbesan | Stratovolcano | 1,126 m (3,694 ft) | 650 | 108 km |
| Yufu-Tsurumi | Lava dome(s) | 1,584 m (5,197 ft) | 867 | 133 km |
| Kujusan | Stratovolcano(es) | 1,791 m (5,876 ft) | 1996 | 158 km |
| Asosan | Caldera | 1,592 m (5,223 ft) | 2020 | 183 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 36°F (2°C) | 3.4 in | Coldest |
| February | 37°F (3°C) | 3.7 in | |
| March | 42°F (6°C) | 5.4 in | |
| April | 52°F (11°C) | 7.4 in | |
| May | 60°F (16°C) | 7.4 in | |
| June | 67°F (19°C) | 12.1 in | |
| July | 74°F (24°C) | 12.9 in | Wettest |
| August | 76°F (24°C) | 6.9 in | Warmest |
| September | 69°F (20°C) | 8.2 in | |
| October | 59°F (15°C) | 4.5 in | |
| November | 49°F (10°C) | 3.5 in | |
| December | 40°F (5°C) | 2.8 in | Driest |
Okugano has a seasonal temperature swing of 40°F / from 36°F in January to 76°F in August. Total annual precipitation is 78.0 inches, with July being the wettest month (12.9") and December the driest (2.8").