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Weather & Climate in Ōmachi, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ōmachi experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 29°F in January while summers reach 72°F in July. The area gets 253 sunny days per year, above the national average. Annual precipitation totals 45.5 inches. The area receives 5.7 inches of snow annually. The city sits at an elevation of 2,343 feet.
Temperature
29°F Jan (-2°C)
72°F Jul (22°C)
| Annual Average | 51.1°F |
| 5% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 253 days/yr |
Geography
| Elevation | 2,343 ft (714 m) |
| Area | 312.6 sq mi (809.7 km²) |
| Population Density | 88/sq mi |
| Coordinates | 36.5000°N, 137.8667°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
694 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.5.
| Jan 1, 2024 | 2024 Noto Peninsula, Japan Earthquake | M7.5 | 122 km | 10 km |
| Mar 25, 2007 | 46 km NW of Nanao, Japan | M6.7 | 147 km | 8 km |
| Feb 7, 1993 | 69 km NNE of Nanao, Japan | M6.6 | 138 km | 11 km |
| Jul 16, 2007 | 20 km NNW of Kashiwazaki, Japan | M6.6 | 126 km | 12 km |
| Mar 11, 2011 | 13 km E of Arai, Japan | M6.2 | 73 km | 9 km |
| May 5, 2023 | 49 km NE of Anamizu, Japan | M6.2 | 127 km | 10 km |
| Jan 1, 2024 | 8 km SW of Anamizu, Japan | M6.2 | 120 km | 10 km |
| Feb 25, 2013 | 29 km NE of Numata, Japan | M5.8 | 129 km | 10 km |
| Jan 1, 2024 | 42 km NE of Anamizu, Japan | M5.8 | 123 km | 10 km |
| Mar 11, 2011 | eastern Honshu, Japan | M5.7 | 63 km | 12 km |
| Jun 2, 2024 | 40 km NE of Anamizu, Japan | M5.7 | 118 km | 9 km |
| Jul 16, 2007 | 16 km NNW of Kashiwazaki, Japan | M5.7 | 124 km | 15 km |
| May 5, 2023 | 43 km NE of Anamizu, Japan | M5.6 | 122 km | 10 km |
| Jan 1, 2024 | 7 km N of Anamizu, Japan | M5.6 | 125 km | 10 km |
| Jan 1, 2024 | 54 km NE of Anamizu, Japan | M5.6 | 120 km | 10 km |
| Aug 15, 1998 | 22 km WSW of Hotaka, Japan | M5.5 | 33 km | 10 km |
| Jan 1, 2024 | 56 km NE of Anamizu, Japan | M5.5 | 122 km | 10 km |
| Mar 15, 2012 | 3 km ENE of ?me, Japan | M5.5 | 149 km | 104 km |
| Apr 11, 2011 | 8 km WSW of Iiyama, Japan | M5.5 | 51 km | 17 km |
| Jan 2, 2024 | 11 km W of Anamizu, Japan | M5.4 | 128 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
29 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 | 212 km |
| 2019 | Hagibis | Category 1 | 92 mph | 170 km |
| 2018 | Jebi | Category 2 | 98 mph | 144 km |
| 2018 | Jongdari | Category 1 | 81 mph | 233 km |
| 2016 | Mindulle | Category 1 | 75 mph | 286 km |
| 2014 | Phanfone | Category 1 | 81 mph | 184 km |
| 2011 | Roke | Category 2 | 92 mph | 137 km |
| 2007 | Fitow | Category 1 | 81 mph | 156 km |
| 2005 | Mawar | Category 2 | 81 mph | 214 km |
| 2004 | Ma-on | Category 3 | 92 mph | 194 km |
| 2004 | Songda | Category 1 | 75 mph | 300 km |
| 2004 | Chaba | Category 1 | 69 mph | 188 km |
| 2003 | Etau | Category 1 | 58 mph | 180 km |
| 2002 | Higos | Category 2 | 86 mph | 194 km |
| 2001 | Danas | Category 1 | 81 mph | 199 km |
| 2000 | Kirogi | Category 1 | 86 mph | 288 km |
| 1998 | Vicki | Category 2 | 86 mph | 40 km |
| 1998 | Zeb | Category 1 | 58 mph | 194 km |
| 1998 | Stella | Category 1 | 69 mph | 168 km |
| 1996 | Kirk | Category 1 | 63 mph | 147 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
14 tsunamis recorded within 500 km. Highest wave on record: 11.3 m (37 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2024 | HONSHU: W COAST | Eruption + Earthquake | 11.3 m | 549 | 122 km |
| 1993 | HONSHU ISLAND | Earthquake | 0.5 m | - | 138 km |
| 1987 | HONSHU ISLAND | Earthquake | 0.2 m | - | 105 km |
| 2023 | NOTO PENINSULA, JAPAN | Earthquake | 0.1 m | 1 | 126 km |
| 2007 | HONSHU: W COAST | Earthquake | 0.1 m | 1 | 147 km |
| 2007 | HONSHU: W COAST | Earthquake | - | 15 | 131 km |
| 1892 | SW. HONSHU ISLAND | Earthquake | - | 1 | 110 km |
| 1802 | NW. HONSHU ISLAND | Earthquake | - | 19 | 139 km |
| 1799 | SW. HONSHU ISLAND | Earthquake | - | - | 114 km |
| 1751 | NW. HONSHU ISLAND | Eruption + Earthquake | - | 2,100 | 81 km |
| 1614 | NIIGATA PREFECTURE | Earthquake | - | - | 112 km |
| 1448 | SADO, JAPAN | Earthquake | - | - | 115 km |
| 887 | NIIGATA | Earthquake | - | 2,000 | 113 km |
| 863 | NW. HONSHU ISLAND | Eruption + Earthquake | - | - | 68 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Midagahara (26 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Midagahara | Stratovolcano | 2,621 m (8,599 ft) | 1839 | 26 km |
| Washiba-Kumonotaira | Shield(s) | 2,924 m (9,593 ft) | Unknown | 26 km |
| Yakedake | Stratovolcano(es) | 2,455 m (8,054 ft) | 1995 | 39 km |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 49 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 49 km |
| Norikuradake | Stratovolcano(es) | 3,026 m (9,928 ft) | -50 | 52 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 60 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 61 km |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 61 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 62 km |
| Ontakesan | Complex | 3,067 m (10,062 ft) | 2014 | 76 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 88 km |
| Hakusan | Stratovolcano | 2,702 m (8,865 ft) | 1659 | 105 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 119 km |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 136 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 2.0 in | Coldest |
| February | 30°F (-1°C) | 2.1 in | |
| March | 37°F (3°C) | 3.1 in | |
| April | 49°F (10°C) | 3.5 in | |
| May | 58°F (15°C) | 3.9 in | |
| June | 65°F (19°C) | 6.1 in | |
| July | 72°F (22°C) | 5.9 in | |
| August | 75°F (24°C) | 4.2 in | Warmest |
| September | 66°F (19°C) | 6.6 in | Wettest |
| October | 54°F (12°C) | 4.0 in | |
| November | 44°F (7°C) | 2.6 in | |
| December | 34°F (1°C) | 1.6 in | Driest |
Ōmachi has a seasonal temperature swing of 45°F / from 29°F in January to 75°F in August. Total annual precipitation is 45.5 inches, with September being the wettest month (6.6") and December the driest (1.6").