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Weather & Climate in Komagane, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Komagane experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 27°F in January while summers reach 69°F in July. The area gets 224 sunny days per year, above the national average. Annual precipitation totals 61.9 inches (wetter than the 38-inch national average). The area receives 9.8 inches of snow annually. The city sits at an elevation of 2,100 feet.
Temperature
27°F Jan (-3°C)
69°F Jul (20°C)
| Annual Average | 48.5°F |
| 10% below US avg | |
| January Average | 27°F (-3°C) |
| July Average | 69°F (20°C) |
| Sunny Days | 224 days/yr |
Geography
| Elevation | 2,100 ft (640 m) |
| Area | 64.0 sq mi (165.9 km²) |
| Population Density | 503/sq mi |
| Coordinates | 35.7166°N, 137.9375°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
550 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.2.
| Mar 11, 2011 | 13 km E of Arai, Japan | M6.2 | 150 km | 9 km |
| Aug 10, 2009 | 8 km NE of Sagara, Japan | M6.2 | 112 km | 40 km |
| Mar 15, 2011 | 6 km NNW of Fujinomiya, Japan | M6.0 | 77 km | 9 km |
| Jan 15, 2007 | 15 km WSW of Heda, Japan | M5.9 | 112 km | 170 km |
| Aug 1, 2011 | 20 km E of ?yama, Japan | M5.9 | 129 km | 13 km |
| Mar 11, 2011 | eastern Honshu, Japan | M5.7 | 140 km | 12 km |
| Mar 4, 1997 | 9 km SSW of It?, Japan | M5.6 | 136 km | 10 km |
| Mar 16, 1997 | 5 km NE of Toyokawa, Japan | M5.6 | 106 km | 36 km |
| Apr 20, 2006 | 16 km SE of It?, Japan | M5.6 | 150 km | 23 km |
| Mar 6, 1996 | 13 km NNE of Gotenba, Japan | M5.6 | 100 km | 33 km |
| May 3, 1998 | 14 km SW of It?, Japan | M5.6 | 134 km | 34 km |
| Apr 11, 2011 | 8 km WSW of Iiyama, Japan | M5.5 | 125 km | 17 km |
| Aug 15, 1998 | 22 km WSW of Hotaka, Japan | M5.5 | 67 km | 10 km |
| Mar 15, 2012 | 3 km ENE of ?me, Japan | M5.5 | 121 km | 104 km |
| Aug 26, 2010 | 25 km ENE of Katsuyama, Japan | M5.4 | 114 km | 278 km |
| Apr 3, 2001 | 10 km NE of Mori, Japan | M5.4 | 91 km | 33 km |
| Jun 26, 1990 | near the south coast of Honshu, Japan | M5.4 | 135 km | 150 km |
| Oct 5, 2011 | 24 km W of ?machi, Japan | M5.3 | 90 km | 10 km |
| Jun 5, 1990 | 13 km NE of Gotenba, Japan | M5.3 | 106 km | 122 km |
| Apr 23, 2020 | 18 km WNW of Shiojiri, Japan | M5.2 | 52 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
35 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2019 | Faxai | Category 3 | 98 mph | 166 km |
| 2019 | Hagibis | Category 2 | 92 mph | 133 km |
| 2018 | Jebi | Category 2 | 98 mph | 213 km |
| 2018 | Jongdari | Category 1 | 81 mph | 155 km |
| 2017 | Lan | Category 1 | 98 mph | 266 km |
| 2016 | Mindulle | Category 1 | 75 mph | 212 km |
| 2014 | Phanfone | Category 1 | 81 mph | 100 km |
| 2011 | Roke | Category 2 | 92 mph | 92 km |
| 2009 | Melor | Category 1 | 86 mph | 227 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 264 km |
| 2007 | Fitow | Category 1 | 81 mph | 115 km |
| 2005 | Mawar | Category 2 | 81 mph | 147 km |
| 2004 | Ma-on | Category 3 | 92 mph | 123 km |
| 2004 | Chaba | Category 1 | 69 mph | 247 km |
| 2003 | Etau | Category 1 | 58 mph | 158 km |
| 2002 | Higos | Category 2 | 86 mph | 161 km |
| 2001 | Danas | Category 1 | 81 mph | 149 km |
| 2000 | Kirogi | Category 1 | 86 mph | 254 km |
| 1998 | Vicki | Category 2 | 86 mph | 116 km |
| 1998 | Zeb | Category 1 | 58 mph | 219 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
11 tsunamis recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1855 | ENSHUNADA | Earthquake | 3.0 m | — | 139 km |
| 1945 | TOKAIDO | Earthquake | 1.0 m | 2,306 | 131 km |
| 2009 | HONSHU: S COAST | Earthquake | 0.6 m | 1 | 112 km |
| 1974 | TOKAIDO | Earthquake | 0.2 m | 30 | 142 km |
| 1857 | TOKAIDO | Earthquake | — | — | 107 km |
| 1666 | AICHI PREFECTURE | Earthquake | — | — | 130 km |
| 1633 | SAGAMI BAY | Earthquake | — | 150 | 128 km |
| 1589 | SURUGA, JAPAN | Earthquake | — | — | 105 km |
| 1586 | ISE BAY | Earthquake | — | 8,000 | 130 km |
| 1241 | KAMAKURA, SAGAMI BAY | Earthquake | — | — | 144 km |
| 818 | TOKAIDO | Eruption + Earthquake | — | — | 136 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Ontakesan (46 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Ontakesan | Complex | 3,067 m (10,062 ft) | 2014 | 46 km |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 54 km |
| Norikuradake | Stratovolcano(es) | 3,026 m (9,928 ft) | -50 | 55 km |
| Yakedake | Stratovolcano(es) | 2,455 m (8,054 ft) | 1995 | 65 km |
| Fujisan | Stratovolcano | 3,776 m (12,388 ft) | 1708 | 82 km |
| Washiba-Kumonotaira | Shield(s) | 2,924 m (9,593 ft) | Unknown | 83 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 93 km |
| Midagahara | Stratovolcano | 2,621 m (8,599 ft) | 1839 | 100 km |
| Hakoneyama | Complex | 1,438 m (4,718 ft) | 2015 | 112 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 113 km |
| Hakusan | Stratovolcano | 2,702 m (8,865 ft) | 1659 | 116 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 118 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 120 km |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 132 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 134 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 27°F (-3°C) | 1.8 in | Coldest |
| February | 28°F (-2°C) | 2.4 in | |
| March | 35°F (1°C) | 4.1 in | |
| April | 46°F (8°C) | 5.4 in | |
| May | 55°F (13°C) | 5.6 in | |
| June | 62°F (17°C) | 8.7 in | |
| July | 69°F (20°C) | 8.2 in | |
| August | 71°F (22°C) | 7.5 in | Warmest |
| September | 63°F (17°C) | 8.9 in | Wettest |
| October | 52°F (11°C) | 5.0 in | |
| November | 42°F (6°C) | 2.8 in | |
| December | 32°F (0°C) | 1.6 in | Driest |
Komagane has a seasonal temperature swing of 44°F / from 27°F in January to 71°F in August. Total annual precipitation is 61.8 inches, with September being the wettest month (8.9") and December the driest (1.6").