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Weather & Climate in Mombetsu, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Mombetsu has a cool climate with an average annual temperature of 42°F (6°C). Winters average 20°F in January while summers reach 62°F in July. The area gets 275 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 33.7 inches. The area receives 7.6 inches of snow annually. The city sits at an elevation of 52 feet.
Temperature
20°F Jan (-7°C)
62°F Jul (17°C)
| Annual Average | 42.3°F |
| 22% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 62°F (17°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 52 ft (16 m) |
| Area | 320.7 sq mi (830.7 km²) |
| Population Density | 72/sq mi |
| Coordinates | 44.3525°N, 143.3525°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
230 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.6.
| Jan 15, 1993 | 52 km NE of Otofuke, Japan | M7.6 | 120 km | 102 km |
| Oct 21, 2011 | 16 km NE of Asahikawa, Japan | M6.1 | 87 km | 187 km |
| Nov 15, 1997 | 19 km NNW of Shibetsu, Japan | M6.1 | 146 km | 161 km |
| Feb 19, 2003 | 26 km NNE of Rumoi, Japan | M5.9 | 126 km | 214 km |
| Jul 1, 2007 | 32 km W of Shibetsu, Japan | M5.8 | 135 km | 130 km |
| Oct 25, 1991 | 36 km N of Kushiro, Japan | M5.5 | 142 km | 98 km |
| Dec 22, 1997 | 17 km ENE of Otofuke, Japan | M5.3 | 142 km | 115 km |
| Jun 20, 2021 | 29 km NE of Shimo-furano, Japan | M5.3 | 106 km | 152 km |
| Aug 15, 1990 | 43 km ESE of Kamikawa, Japan | M5.3 | 66 km | 162 km |
| Jan 8, 2015 | 21 km W of Shibetsu, Japan | M5.3 | 142 km | 132 km |
| Sep 15, 1995 | 48 km WNW of Kushiro, Japan | M5.2 | 148 km | 106 km |
| Aug 13, 2013 | 35 km WSW of Kitami, Japan | M5.1 | 71 km | 178 km |
| Apr 10, 2006 | 30 km W of Shibetsu, Japan | M5.1 | 134 km | 120 km |
| May 21, 2013 | 83 km ESE of Makubetsu, Japan | M5.1 | 96 km | 273 km |
| Aug 10, 2022 | 51 km SSE of Makubetsu, Japan | M5.1 | 120 km | 10 km |
| Feb 21, 1990 | 27 km SSW of Nayoro, Japan | M5.1 | 89 km | 33 km |
| Jul 5, 2024 | 10 km WNW of Nayoro, Japan | M5.1 | 82 km | 232 km |
| Nov 10, 1990 | 23 km W of Nayoro, Japan | M5.1 | 95 km | 16 km |
| Jul 20, 1993 | 33 km W of Nayoro, Japan | M5.0 | 104 km | 18 km |
| May 10, 2005 | 35 km E of Kamikawa, Japan | M5.0 | 65 km | 161 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 0.9 m (3 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1938 | E. HOKKAIDO ISLAND | Earthquake | 0.9 m | 1 | 113 km |
| 1956 | NE. HOKKAIDO ISLAND | Earthquake | 0.4 m | — | 60 km |
| 1863 | NW. HOKKAIDO ISLAND | Earthquake | — | — | 150 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
9 volcanoes within 200 km. Closest: Taisetsuzan (86 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 86 km |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 107 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 117 km |
| Kussharo | Caldera | 574 m (1,883 ft) | 1320 | 119 km |
| Akan | Caldera | 1,499 m (4,918 ft) | 2008 | 120 km |
| Mashu | Caldera | 857 m (2,812 ft) | 1080 | 130 km |
| Shiretoko-Iozan | Stratovolcano | 1,562 m (5,125 ft) | 1936 | 146 km |
| Tomariyama [Golovnin] | Caldera | 535 m (1,755 ft) | 1848 | 181 km |
| Raususan [Mendeleev] | Stratovolcano | 882 m (2,894 ft) | 1880 | 194 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 2.1 in | |
| February | 19°F (-7°C) | 1.4 in | Coldest, Driest |
| March | 27°F (-3°C) | 2.0 in | |
| April | 39°F (4°C) | 2.0 in | |
| May | 48°F (9°C) | 2.6 in | |
| June | 54°F (12°C) | 2.8 in | |
| July | 62°F (17°C) | 3.6 in | |
| August | 66°F (19°C) | 4.8 in | Warmest, Wettest |
| September | 60°F (16°C) | 4.7 in | |
| October | 49°F (10°C) | 3.3 in | |
| November | 37°F (3°C) | 2.4 in | |
| December | 26°F (-3°C) | 2.1 in |
Mombetsu has a seasonal temperature swing of 47°F / from 19°F in February to 66°F in August. Total annual precipitation is 33.7 inches, with August being the wettest month (4.8") and February the driest (1.4").