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Weather & Climate in Kōya, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Kōya enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 36°F in January while summers reach 75°F in July. The area gets 208 sunny days per year. Annual precipitation totals 70.4 inches (wetter than the 38-inch national average). The city sits at an elevation of 2,602 feet.
Temperature
36°F Jan (2°C)
75°F Jul (24°C)
| Annual Average | 55.5°F |
| 3% above US avg | |
| January Average | 36°F (2°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 208 days/yr |
Geography
| Elevation | 2,602 ft (793 m) |
| Area | 52.9 sq mi (137.0 km²) |
| Population Density | 62/sq mi |
| Coordinates | 34.2129°N, 135.6224°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
472 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.9.
| Jan 16, 1995 | 8 km S of Akashi, Japan | M6.9 | 69 km | 22 km |
| Apr 11, 1990 | 11 km ENE of Maizuru, Japan | M6.1 | 141 km | 362 km |
| Jul 7, 1995 | 62 km SSE of Toba, Japan | M6.0 | 141 km | 333 km |
| Apr 1, 2016 | 54 km SE of Shing?, Japan | M5.9 | 117 km | 14 km |
| Jun 1, 1998 | 17 km SW of Owase, Japan | M5.8 | 52 km | 399 km |
| Feb 26, 2025 | 38 km ESE of Shingū, Japan | M5.8 | 96 km | 388 km |
| Apr 12, 2013 | 6 km WNW of Sumoto, Japan | M5.8 | 75 km | 14 km |
| Aug 20, 1999 | 22 km SE of Kainan, Japan | M5.7 | 29 km | 66 km |
| Nov 18, 2013 | 25 km SE of Toba, Japan | M5.6 | 132 km | 328 km |
| Jun 17, 2018 | near the south coast of western Honshu, Japan | M5.5 | 68 km | 10 km |
| Aug 1, 2007 | 42 km ESE of Owase, Japan | M5.5 | 98 km | 371 km |
| Oct 30, 2000 | western Honshu, Japan | M5.5 | 55 km | 35 km |
| Jan 18, 2003 | 67 km SSE of Toba, Japan | M5.5 | 147 km | 33 km |
| Sep 24, 2003 | 5 km WNW of Ayabe, Japan | M5.4 | 129 km | 372 km |
| May 9, 2022 | 7 km NE of Toba, Japan | M5.3 | 122 km | 329 km |
| Jan 6, 2004 | 36 km S of Ise, Japan | M5.3 | 97 km | 33 km |
| Apr 22, 1998 | 18 km SE of Hikone, Japan | M5.2 | 128 km | 33 km |
| Mar 13, 2019 | 22 km ESE of Anan, Japan | M5.2 | 84 km | 37 km |
| Jun 10, 2009 | 7 km WSW of Ise, Japan | M5.1 | 96 km | 352 km |
| Apr 15, 2007 | 11 km ENE of Ueno-ebisumachi, Japan | M5.1 | 87 km | 16 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
53 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Nakri | Category 1 | - | 291 km |
| 2023 | Lan | Category 2 | 81 mph | 58 km |
| 2019 | Hagibis | Category 2 | 92 mph | 245 km |
| 2018 | Jebi | Category 3 | 98 mph | 67 km |
| 2018 | Trami | Category 1 | 92 mph | 47 km |
| 2018 | Cimaron | Category 1 | 92 mph | 95 km |
| 2018 | Jongdari | Category 1 | 81 mph | 139 km |
| 2017 | Lan | Category 2 | 104 mph | 172 km |
| 2017 | Noru | Category 1 | 69 mph | 54 km |
| 2016 | Malakas | Category 1 | 86 mph | 252 km |
| 2015 | Nangka | Category 1 | 81 mph | 182 km |
| 2014 | Phanfone | Category 2 | 92 mph | 105 km |
| 2014 | Halong | Category 1 | 81 mph | 254 km |
| 2012 | Jelawat | Category 1 | 92 mph | 192 km |
| 2011 | Roke | Category 4 | 98 mph | 114 km |
| 2011 | Ma-on | Category 1 | 86 mph | 116 km |
| 2010 | Chaba | Category 1 | 75 mph | 292 km |
| 2009 | Melor | Category 1 | 92 mph | 93 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 125 km |
| 2007 | Fitow | Category 1 | 81 mph | 283 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
20 tsunamis recorded within 500 km. Highest wave on record: 28.0 m (92 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1854 | NANKAIDO | Earthquake | 28.0 m | 3,000 | 137 km |
| 1707 | NANKAIDO | Earthquake | 25.7 m | 5,000 | 136 km |
| 1944 | OFF SOUTHEAST COAST KII PENINSULA | Earthquake | 10.0 m | 1,223 | 138 km |
| 1946 | HONSHU: S COAST | Earthquake | 6.6 m | 1,362 | 124 km |
| 1711 | SEIONAIKAI, JAPAN | Earthquake | 2.0 m | 1,000 | 149 km |
| 1520 | KII, KUMANANONADA | Earthquake | 2.0 m | - | 93 km |
| 1510 | OSAKA BAY | Earthquake | 2.0 m | - | 48 km |
| 1408 | KUMANONADA | Earthquake | 2.0 m | - | 126 km |
| 1403 | KUMANONADA | Earthquake | 2.0 m | - | 99 km |
| 922 | KUMANONADA | Earthquake | 2.0 m | - | 109 km |
| 1909 | ANEGAWA, JAPAN | Earthquake | 1.8 m | 41 | 146 km |
| 1808 | E. AWA, TOKUSHIMA PREFECTURE | Earthquake | 1.5 m | - | 83 km |
| 1948 | TOKAIDO | Earthquake | 0.6 m | - | 124 km |
| 1995 | KOBE, JAPAN | Earthquake | 0.3 m | 6,434 | 66 km |
| 1791 | OASAKA BAY | Earthquake | - | - | 38 km |
| 1708 | TOKAIDO | Earthquake | - | - | 129 km |
| 1666 | AICHI PREFECTURE | Earthquake | - | - | 139 km |
| 1586 | ISE BAY | Earthquake | - | 8,000 | 139 km |
| 1498 | NANKAIDO | Earthquake | - | - | 88 km |
| 1361 | NANKAIDO | Earthquake | - | 660 | 147 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 36°F (2°C) | 2.3 in | Coldest |
| February | 37°F (3°C) | 2.8 in | |
| March | 42°F (6°C) | 4.7 in | |
| April | 53°F (12°C) | 6.7 in | |
| May | 61°F (16°C) | 7.1 in | |
| June | 68°F (20°C) | 10.6 in | Wettest |
| July | 75°F (24°C) | 8.4 in | |
| August | 76°F (25°C) | 6.9 in | Warmest |
| September | 70°F (21°C) | 9.5 in | |
| October | 59°F (15°C) | 5.9 in | |
| November | 50°F (10°C) | 3.7 in | |
| December | 41°F (5°C) | 1.9 in | Driest |
Kōya has a seasonal temperature swing of 40°F / from 36°F in January to 76°F in August. Total annual precipitation is 70.4 inches, with June being the wettest month (10.6") and December the driest (1.9").