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Weather & Climate in Ōmu, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ōmu has a cool climate with an average annual temperature of 41°F (5°C). Winters average 17°F in January while summers reach 62°F in July. The area gets 266 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 38.4 inches. The area receives 12.6 inches of snow annually. The city sits at an elevation of 85 feet.
Temperature
17°F Jan (-8°C)
62°F Jul (17°C)
| Annual Average | 41.1°F |
| 24% below US avg | |
| January Average | 17°F (-8°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 266 days/yr |
Geography
| Elevation | 85 ft (26 m) |
| Area | 604.4 sq mi (1,565.5 km²) |
| Population Density | 8/sq mi |
| Coordinates | 44.5778°N, 142.9613°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
249 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.2.
| Jan 11, 2016 | 74 km NW of Rumoi, Japan | M6.2 | 149 km | 239 km |
| Oct 21, 2011 | 16 km NE of Asahikawa, Japan | M6.1 | 85 km | 187 km |
| Jun 16, 1992 | 50 km NE of Makubetsu, Japan | M6.0 | 137 km | 317 km |
| Feb 19, 2003 | 26 km NNE of Rumoi, Japan | M5.9 | 104 km | 214 km |
| Jun 23, 2023 | 94 km NE of Hamatonbetsu, Japan | M5.6 | 138 km | 314 km |
| May 23, 1995 | Hokkaido, Japan region | M5.6 | 142 km | 17 km |
| Feb 9, 1993 | 38 km NNE of Makubetsu, Japan | M5.6 | 149 km | 307 km |
| Jan 24, 1993 | 51 km NNE of Makubetsu, Japan | M5.3 | 146 km | 306 km |
| Jun 20, 2021 | 29 km NE of Shimo-furano, Japan | M5.3 | 117 km | 152 km |
| Aug 15, 1990 | 43 km ESE of Kamikawa, Japan | M5.3 | 95 km | 162 km |
| Aug 13, 2013 | 35 km WSW of Kitami, Japan | M5.1 | 104 km | 178 km |
| Aug 10, 2022 | 51 km SSE of Makubetsu, Japan | M5.1 | 80 km | 10 km |
| May 21, 2013 | 83 km ESE of Makubetsu, Japan | M5.1 | 63 km | 273 km |
| Nov 10, 1990 | 23 km W of Nayoro, Japan | M5.1 | 68 km | 16 km |
| Feb 21, 1990 | 27 km SSW of Nayoro, Japan | M5.1 | 73 km | 33 km |
| Jul 5, 2024 | 10 km WNW of Nayoro, Japan | M5.1 | 56 km | 232 km |
| Feb 7, 2012 | 37 km ENE of Makubetsu, Japan | M5.0 | 124 km | 315 km |
| Oct 4, 1994 | 29 km E of Makubetsu, Japan | M5.0 | 112 km | 33 km |
| May 10, 2005 | 35 km E of Kamikawa, Japan | M5.0 | 91 km | 161 km |
| Jul 20, 1993 | 33 km W of Nayoro, Japan | M5.0 | 78 km | 18 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 0.4 m (1 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1956 | NE. HOKKAIDO ISLAND | Earthquake | 0.4 m | — | 96 km |
| 1863 | NW. HOKKAIDO ISLAND | Earthquake | — | — | 116 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
7 volcanoes within 200 km. Closest: Taisetsuzan (102 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 102 km |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 129 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 131 km |
| Akan | Caldera | 1,499 m (4,918 ft) | 2008 | 157 km |
| Kussharo | Caldera | 574 m (1,883 ft) | 1320 | 159 km |
| Mashu | Caldera | 857 m (2,812 ft) | 1080 | 170 km |
| Shiretoko-Iozan | Stratovolcano | 1,562 m (5,125 ft) | 1936 | 182 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 17°F (-8°C) | 2.5 in | |
| February | 17°F (-9°C) | 1.7 in | Coldest, Driest |
| March | 25°F (-4°C) | 2.2 in | |
| April | 39°F (4°C) | 2.2 in | |
| May | 48°F (9°C) | 2.8 in | |
| June | 54°F (12°C) | 2.8 in | |
| July | 62°F (17°C) | 3.7 in | |
| August | 66°F (19°C) | 5.2 in | Warmest, Wettest |
| September | 59°F (15°C) | 5.1 in | |
| October | 48°F (9°C) | 4.0 in | |
| November | 35°F (2°C) | 3.4 in | |
| December | 24°F (-5°C) | 2.8 in |
Ōmu has a seasonal temperature swing of 50°F / from 17°F in February to 66°F in August. Total annual precipitation is 38.4 inches, with August being the wettest month (5.2") and February the driest (1.7").