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Weather & Climate in Kōzan, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Kōzan enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 37°F in January while summers reach 77°F in July. The area gets 222 sunny days per year, above the national average. Annual precipitation totals 62.6 inches (wetter than the 38-inch national average). The city sits at an elevation of 1,106 feet.
Temperature
37°F Jan (3°C)
77°F Jul (25°C)
| Annual Average | 56.9°F |
| 5% above US avg | |
| January Average | 37°F (3°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 222 days/yr |
Geography
| Elevation | 1,106 ft (337 m) |
| Area | 110.9 sq mi (287.1 km²) |
| Population Density | 136/sq mi |
| Coordinates | 34.5833°N, 133.0500°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
101 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 |
| Oct 6, 2000 | 8 km ESE of Matsue, Japan | M6.7 | 97 km | 10 km |
| Jun 25, 1997 | 17 km E of Hagi, Japan | M5.9 | 134 km | 10 km |
| Apr 8, 2018 | 8 km NNE of ?dach?-?da, Japan | M5.7 | 88 km | 10 km |
| Aug 28, 1991 | 9 km SSW of Yasugich?, Japan | M5.5 | 85 km | 13 km |
| Oct 8, 2000 | 32 km N of Sh?bara, Japan | M5.4 | 63 km | 10 km |
| Sep 16, 2002 | 24 km SW of Kurayoshi, Japan | M5.3 | 93 km | 10 km |
| Sep 3, 1997 | 21 km S of Yasugich?, Japan | M5.3 | 73 km | 10 km |
| Mar 25, 2001 | 22 km WNW of H?j?, Japan | M5.2 | 78 km | 43 km |
| Oct 8, 2000 | 8 km SSW of Yonago, Japan | M5.2 | 90 km | 10 km |
| Apr 26, 2007 | 15 km ESE of Niihama, Japan | M5.1 | 84 km | 50 km |
| Aug 14, 1993 | 19 km SW of ?zu, Japan | M5.0 | 148 km | 41 km |
| Jun 3, 2011 | 9 km ENE of G?tsuch?, Japan | M5.0 | 83 km | 10 km |
| Jan 3, 1991 | 22 km W of ?zu, Japan | M5.0 | 139 km | 63 km |
| Jun 18, 2021 | 1 km ENE of ?zu, Japan | M4.9 | 128 km | 42 km |
| Jan 9, 2001 | 40 km W of ?zu, Japan | M4.9 | 141 km | 49 km |
| Aug 30, 1993 | 16 km WSW of ?zu, Japan | M4.9 | 142 km | 47 km |
| Feb 26, 2024 | 18 km N of Yawatahama, Japan | M4.9 | 122 km | 42 km |
| Sep 28, 1990 | 24 km NNW of Kariya, Japan | M4.9 | 117 km | 26 km |
| May 26, 2005 | 6 km SSW of Kan’onjich?, Japan | M4.8 | 78 km | 38 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 |
| 2023 | Lan | Category 1 | 69 mph | 263 km |
| 2022 | Nanmadol | Category 1 | 86 mph | 251 km |
| 2019 | Francisco | Category 1 | 81 mph | 294 km |
| 2018 | Jebi | Category 3 | 98 mph | 167 km |
| 2018 | Trami | Category 1 | 92 mph | 198 km |
| 2018 | Cimaron | Category 1 | 86 mph | 151 km |
| 2017 | Noru | Category 1 | 69 mph | 173 km |
| 2016 | Malakas | Category 1 | 86 mph | 203 km |
| 2015 | Goni | Category 3 | 98 mph | 199 km |
| 2015 | Nangka | Category 1 | 81 mph | 211 km |
| 2014 | Phanfone | Category 2 | 92 mph | 280 km |
| 2014 | Halong | Category 1 | 81 mph | 178 km |
| 2012 | Jelawat | Category 1 | 92 mph | 279 km |
| 2011 | Ma-on | Category 1 | 86 mph | 167 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 251 km |
| 2007 | Usagi | Category 2 | 92 mph | 140 km |
| 2007 | Man-yi | Category 1 | 81 mph | 211 km |
| 2006 | Shanshan | Category 1 | 81 mph | 252 km |
| 2005 | Nabi | Category 2 | 86 mph | 170 km |
| 2004 | Songda | Category 2 | 86 mph | 111 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
3 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 | 117 km |
| 1872 | SW. HONSHU ISLAND | Earthquake | 3.0 m | 804 | 102 km |
| 1711 | SEIONAIKAI, JAPAN | Earthquake | 2.0 m | 1,000 | 93 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Sanbesan (73 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Sanbesan | Stratovolcano | 1,126 m (3,694 ft) | 650 | 73 km |
| Abu | Shield(s) | 641 m (2,103 ft) | -6850 | 133 km |
| Oki-Dogo | Shield | 151 m (495 ft) | Unknown | 179 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 37°F (3°C) | 2.2 in | Coldest |
| February | 38°F (3°C) | 2.8 in | |
| March | 44°F (7°C) | 3.9 in | |
| April | 54°F (12°C) | 5.6 in | |
| May | 62°F (17°C) | 5.8 in | |
| June | 69°F (21°C) | 10.0 in | Wettest |
| July | 77°F (25°C) | 9.7 in | |
| August | 79°F (26°C) | 5.6 in | Warmest |
| September | 71°F (22°C) | 7.8 in | |
| October | 60°F (16°C) | 4.4 in | |
| November | 50°F (10°C) | 2.7 in | |
| December | 42°F (5°C) | 1.9 in | Driest |
Kōzan has a seasonal temperature swing of 42°F / from 37°F in January to 79°F in August. Total annual precipitation is 62.6 inches, with June being the wettest month (10.0") and December the driest (1.9").