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Weather & Climate in Onna, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Onna has a warm climate with an average annual temperature of 73°F (23°C). Winters average 62°F in January while summers reach 83°F in July. The area gets 187 sunny days per year. Annual precipitation totals 81.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 46 feet.
Temperature
62°F Jan (17°C)
83°F Jul (29°C)
| Annual Average | 72.8°F |
| 35% above US avg | |
| January Average | 62°F (17°C) |
| July Average | 83°F (29°C) |
| Sunny Days | 187 days/yr |
Geography
| Elevation | 46 ft (14 m) |
| Area | 93.5 sq mi (242.0 km²) |
| Population Density | 116/sq mi |
| Coordinates | 26.4954°N, 127.8510°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
945 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.0.
| Feb 26, 2010 | 70 km SE of Katsuren-haebaru, Japan | M7.0 | 85 km | 25 km |
| Mar 2, 2014 | 109 km NW of Nago, Japan | M6.5 | 115 km | 119 km |
| Jul 22, 2004 | 91 km E of Nago, Japan | M6.1 | 104 km | 21 km |
| Jul 8, 2008 | 107 km NNE of Nago, Japan | M6.0 | 125 km | 43 km |
| Aug 7, 2007 | 136 km WNW of Nago, Japan | M6.0 | 134 km | 18 km |
| Apr 14, 1991 | 82 km NW of Nago, Japan | M6.0 | 85 km | 83 km |
| Jul 31, 2007 | 134 km NW of Nago, Japan | M5.9 | 134 km | 10 km |
| May 1, 2023 | 69 km ESE of Katsuren-haebaru, Japan | M5.9 | 82 km | 9 km |
| May 17, 1990 | 13 km W of Nago, Japan | M5.8 | 14 km | 33 km |
| Jun 2, 1996 | 102 km NNE of Nago, Japan | M5.8 | 121 km | 42 km |
| Apr 20, 2007 | 102 km NNE of Nago, Japan | M5.7 | 120 km | 42 km |
| Sep 26, 2016 | 110 km NNE of Nago, Japan | M5.7 | 130 km | 38 km |
| Jun 13, 2013 | 90 km E of Nago, Japan | M5.6 | 103 km | 20 km |
| Feb 21, 2022 | 143 km WNW of Naha, Japan | M5.6 | 146 km | 11 km |
| Jun 3, 2022 | 140 km WNW of Naha, Japan | M5.6 | 146 km | 10 km |
| Apr 13, 2022 | 145 km WNW of Naha, Japan | M5.6 | 148 km | 8 km |
| Jan 15, 1995 | 109 km NNE of Nago, Japan | M5.6 | 128 km | 47 km |
| Feb 8, 2022 | Ryukyu Islands, Japan | M5.6 | 137 km | 10 km |
| May 7, 2022 | 137 km WNW of Naha, Japan | M5.5 | 142 km | 10 km |
| Apr 9, 1997 | 69 km ESE of Katsuren-haebaru, Japan | M5.5 | 80 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
103 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Bebinca | Category 1 | 75 mph | 269 km |
| 2023 | Khanun | Category 4 | 109 mph | 116 km |
| 2022 | Hinnamnor | Category 4 | 115 mph | 165 km |
| 2021 | In-fa | Category 2 | 92 mph | 250 km |
| 2020 | Maysak | Category 4 | 109 mph | 142 km |
| 2020 | Haishen | Category 3 | 109 mph | 288 km |
| 2020 | Bavi | Category 2 | 86 mph | 187 km |
| 2019 | Lingling | Category 4 | 109 mph | 266 km |
| 2019 | Neoguri | Category 2 | 81 mph | 234 km |
| 2019 | Tapah | Category 1 | 75 mph | 245 km |
| 2018 | Maria | Category 3 | 104 mph | 280 km |
| 2018 | Trami | Category 2 | 98 mph | 46 km |
| 2018 | Prapiroon | Category 1 | 75 mph | 107 km |
| 2018 | Kong-rey | Category 1 | 75 mph | 161 km |
| 2017 | Talim | Category 3 | 104 mph | 267 km |
| 2017 | Saola | Category 1 | 69 mph | 87 km |
| 2016 | Chaba | Category 5 | 132 mph | 127 km |
| 2016 | Namtheun | Category 3 | 81 mph | 266 km |
| 2016 | Malakas | Category 3 | 109 mph | 291 km |
| 2015 | Chan-hom | Category 4 | 104 mph | 199 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 1.2 m (4 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1768 | RYUKYU ISLANDS | Earthquake | 1.2 m | - | 48 km |
| 2010 | RYUKYU ISLANDS | Earthquake | 0.1 m | - | 85 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km. Closest: Io-Torishima (158 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Io-Torishima | Complex | 212 m (696 ft) | 1968 | 158 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 62°F (17°C) | 4.8 in | Coldest |
| February | 62°F (17°C) | 5.0 in | |
| March | 65°F (18°C) | 6.6 in | |
| April | 70°F (21°C) | 7.5 in | |
| May | 75°F (24°C) | 9.5 in | Wettest |
| June | 80°F (27°C) | 9.2 in | |
| July | 83°F (29°C) | 6.7 in | Warmest |
| August | 83°F (28°C) | 9.1 in | |
| September | 81°F (27°C) | 7.4 in | |
| October | 77°F (25°C) | 6.6 in | |
| November | 71°F (22°C) | 5.3 in | |
| December | 65°F (18°C) | 4.3 in | Driest |
Onna has a seasonal temperature swing of 22°F / from 62°F in January to 83°F in July. Total annual precipitation is 81.9 inches, with May being the wettest month (9.5") and December the driest (4.3").