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Weather & Climate in Gero, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Gero experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 31°F in January while summers reach 72°F in July. The area gets 188 sunny days per year. Annual precipitation totals 81.5 inches (wetter than the 38-inch national average). The area receives 6.4 inches of snow annually. The city sits at an elevation of 2,562 feet.
Temperature
31°F Jan (-0°C)
72°F Jul (22°C)
| Annual Average | 52.1°F |
| 4% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 188 days/yr |
Geography
| Elevation | 2,562 ft (781 m) |
| Area | 328.7 sq mi (851.2 km²) |
| Population Density | 107/sq mi |
| Coordinates | 35.8000°N, 137.2333°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
379 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.
| Mar 15, 2011 | 6 km NNW of Fujinomiya, Japan | M6.0 | 135 km | 9 km |
| Mar 16, 1997 | 5 km NE of Toyokawa, Japan | M5.6 | 107 km | 36 km |
| Apr 11, 2011 | 8 km WSW of Iiyama, Japan | M5.5 | 147 km | 17 km |
| Aug 15, 1998 | 22 km WSW of Hotaka, Japan | M5.5 | 64 km | 10 km |
| May 17, 1990 | 7 km W of Nanao, Japan | M5.4 | 144 km | 267 km |
| Apr 3, 2001 | 10 km NE of Mori, Japan | M5.4 | 123 km | 33 km |
| Aug 26, 2010 | 25 km ENE of Katsuyama, Japan | M5.4 | 54 km | 278 km |
| Oct 5, 2011 | 24 km W of ?machi, Japan | M5.3 | 82 km | 10 km |
| May 9, 2022 | 7 km NE of Toba, Japan | M5.3 | 144 km | 329 km |
| Oct 5, 1996 | 12 km NW of Kanaya, Japan | M5.2 | 123 km | 48 km |
| Oct 5, 2011 | eastern Honshu, Japan | M5.2 | 78 km | 13 km |
| Apr 23, 2020 | 18 km WNW of Shiojiri, Japan | M5.2 | 64 km | 10 km |
| Jun 24, 2017 | 31 km ENE of Gero, Japan | M5.2 | 31 km | 10 km |
| May 19, 2020 | 18 km WSW of Hotaka, Japan | M5.2 | 68 km | 10 km |
| Apr 22, 1998 | 18 km SE of Hikone, Japan | M5.2 | 103 km | 33 km |
| Jul 14, 1991 | 5 km E of Ueda, Japan | M5.2 | 120 km | 188 km |
| Mar 16, 1999 | 10 km WNW of Kitahama, Japan | M5.1 | 144 km | 33 km |
| May 29, 2020 | 15 km WSW of Toyoshina, Japan | M5.1 | 67 km | 10 km |
| May 12, 2018 | 7 km SSE of Hakuba, Japan | M5.1 | 111 km | 10 km |
| Feb 26, 2011 | 9 km E of Takayama, Japan | M5.1 | 37 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
40 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 | 272 km |
| 2019 | Faxai | Category 3 | 98 mph | 224 km |
| 2019 | Hagibis | Category 2 | 92 mph | 189 km |
| 2018 | Jebi | Category 2 | 98 mph | 151 km |
| 2018 | Trami | Category 1 | 92 mph | 273 km |
| 2018 | Cimaron | Category 1 | 86 mph | 266 km |
| 2018 | Jongdari | Category 1 | 81 mph | 145 km |
| 2017 | Lan | Category 1 | 98 mph | 267 km |
| 2017 | Noru | Category 1 | 69 mph | 279 km |
| 2016 | Mindulle | Category 1 | 75 mph | 265 km |
| 2014 | Phanfone | Category 1 | 81 mph | 140 km |
| 2011 | Roke | Category 2 | 92 mph | 113 km |
| 2009 | Melor | Category 1 | 86 mph | 208 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 258 km |
| 2007 | Fitow | Category 1 | 81 mph | 179 km |
| 2005 | Mawar | Category 2 | 81 mph | 199 km |
| 2004 | Ma-on | Category 3 | 92 mph | 173 km |
| 2004 | Chaba | Category 1 | 69 mph | 200 km |
| 2003 | Etau | Category 2 | 86 mph | 96 km |
| 2002 | Higos | Category 2 | 86 mph | 224 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
10 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 | - | 148 km |
| 1909 | ANEGAWA, JAPAN | Earthquake | 1.8 m | 41 | 95 km |
| 1945 | TOKAIDO | Earthquake | 1.0 m | 2,306 | 122 km |
| 1892 | SW. HONSHU ISLAND | Earthquake | - | 1 | 139 km |
| 1857 | TOKAIDO | Earthquake | - | - | 147 km |
| 1799 | SW. HONSHU ISLAND | Earthquake | - | - | 106 km |
| 1726 | KATSUYAMA | Earthquake | - | - | 124 km |
| 1666 | AICHI PREFECTURE | Earthquake | - | - | 97 km |
| 1589 | SURUGA, JAPAN | Earthquake | - | - | 142 km |
| 1586 | ISE BAY | Earthquake | - | 8,000 | 97 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Ontakesan (25 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Ontakesan | Complex | 3,067 m (10,062 ft) | 2014 | 25 km |
| Norikuradake | Stratovolcano(es) | 3,026 m (9,928 ft) | -50 | 45 km |
| Yakedake | Stratovolcano(es) | 2,455 m (8,054 ft) | 1995 | 57 km |
| Hakusan | Stratovolcano | 2,702 m (8,865 ft) | 1659 | 57 km |
| Washiba-Kumonotaira | Shield(s) | 2,924 m (9,593 ft) | Unknown | 75 km |
| Midagahara | Stratovolcano | 2,621 m (8,599 ft) | 1839 | 92 km |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 103 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 134 km |
| Fujisan | Stratovolcano | 3,776 m (12,388 ft) | 1708 | 144 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 144 km |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 145 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 148 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 152 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 164 km |
| Hakoneyama | Complex | 1,438 m (4,718 ft) | 2015 | 174 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 3.1 in | Coldest |
| February | 32°F (0°C) | 3.3 in | |
| March | 38°F (3°C) | 5.4 in | |
| April | 50°F (10°C) | 7.2 in | |
| May | 58°F (14°C) | 7.1 in | |
| June | 65°F (19°C) | 10.4 in | |
| July | 72°F (22°C) | 11.3 in | Wettest |
| August | 74°F (24°C) | 9.7 in | Warmest |
| September | 67°F (19°C) | 11.2 in | |
| October | 56°F (13°C) | 5.9 in | |
| November | 46°F (8°C) | 3.8 in | |
| December | 36°F (2°C) | 3.0 in | Driest |
Gero has a seasonal temperature swing of 43°F / from 31°F in January to 74°F in August. Total annual precipitation is 81.5 inches, with July being the wettest month (11.3") and December the driest (3.0").