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Weather & Climate in Wassamu, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Wassamu has a cool climate with an average annual temperature of 42°F (5°C). Winters average 15°F in January while summers reach 66°F in July. The area gets 258 sunny days per year, above the national average. Annual precipitation totals 42.9 inches. The area receives 14.9 inches of snow annually. The city sits at an elevation of 466 feet.
Temperature
15°F Jan (-9°C)
66°F Jul (19°C)
| Annual Average | 41.8°F |
| 23% below US avg | |
| January Average | 15°F (-9°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 258 days/yr |
Geography
| Elevation | 466 ft (142 m) |
| Area | 50.6 sq mi (131.0 km²) |
| Population Density | 70/sq mi |
| Coordinates | 44.0208°N, 142.4178°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
309 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 | 130 km | 102 km |
| Feb 2, 2013 | 18 km SSW of Obihiro, Japan | M6.9 | 149 km | 107 km |
| Jan 11, 2016 | 74 km NW of Rumoi, Japan | M6.2 | 118 km | 239 km |
| Oct 21, 2011 | 16 km NE of Asahikawa, Japan | M6.1 | 15 km | 187 km |
| Feb 19, 2003 | 26 km NNE of Rumoi, Japan | M5.9 | 51 km | 214 km |
| May 23, 1995 | Hokkaido, Japan region | M5.6 | 68 km | 17 km |
| Jan 22, 2013 | 77 km SSW of Rishiri Town, Japan | M5.4 | 127 km | 235 km |
| Feb 21, 2019 | 25 km ESE of Chitose, Japan | M5.4 | 145 km | 28 km |
| Jun 20, 2021 | 29 km NE of Shimo-furano, Japan | M5.3 | 54 km | 152 km |
| Jul 1, 2017 | 22 km E of Chitose, Japan | M5.3 | 140 km | 37 km |
| Dec 22, 1997 | 17 km ENE of Otofuke, Japan | M5.3 | 131 km | 115 km |
| Aug 15, 1990 | 43 km ESE of Kamikawa, Japan | M5.3 | 76 km | 162 km |
| May 21, 2013 | 83 km ESE of Makubetsu, Japan | M5.1 | 128 km | 273 km |
| Feb 21, 1990 | 27 km SSW of Nayoro, Japan | M5.1 | 18 km | 33 km |
| Nov 10, 1990 | 23 km W of Nayoro, Japan | M5.1 | 44 km | 16 km |
| Jul 5, 2024 | 10 km WNW of Nayoro, Japan | M5.1 | 40 km | 232 km |
| Aug 13, 2013 | 35 km WSW of Kitami, Japan | M5.1 | 91 km | 178 km |
| Aug 10, 2022 | 51 km SSE of Makubetsu, Japan | M5.1 | 106 km | 10 km |
| May 10, 2005 | 35 km E of Kamikawa, Japan | M5.0 | 69 km | 161 km |
| Apr 29, 1994 | 29 km W of Otofuke, Japan | M5.0 | 122 km | 126 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
4 tsunamis recorded within 500 km. Highest wave on record: 2.0 m (7 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1947 | W. HOKKAIDO ISLAND | Earthquake | 2.0 m | — | 116 km |
| 1956 | NE. HOKKAIDO ISLAND | Earthquake | 0.4 m | — | 138 km |
| 1863 | NW. HOKKAIDO ISLAND | Earthquake | — | — | 97 km |
| 1834 | W. HOKKAIDO ISLAND | Earthquake | — | — | 115 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
10 volcanoes within 200 km. Closest: Taisetsuzan (53 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 53 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 70 km |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 83 km |
| Akan | Caldera | 1,499 m (4,918 ft) | 2008 | 147 km |
| Kussharo | Caldera | 574 m (1,883 ft) | 1320 | 167 km |
| Shikotsu | Caldera | 1,320 m (4,331 ft) | 1979 | 170 km |
| Mashu | Caldera | 857 m (2,812 ft) | 1080 | 179 km |
| Yoteizan | Stratovolcano | 1,888 m (6,194 ft) | -1050 | 186 km |
| Niseko | Stratovolcano(es) | 1,308 m (4,291 ft) | -4900 | 191 km |
| Kuttara | Stratovolcano(es) | 549 m (1,801 ft) | 1820 | 198 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 15°F (-9°C) | 2.8 in | Coldest |
| February | 16°F (-9°C) | 2.0 in | Driest |
| March | 25°F (-4°C) | 2.2 in | |
| April | 39°F (4°C) | 2.4 in | |
| May | 50°F (10°C) | 2.9 in | |
| June | 58°F (15°C) | 2.9 in | |
| July | 66°F (19°C) | 4.0 in | |
| August | 68°F (20°C) | 5.6 in | Warmest, Wettest |
| September | 59°F (15°C) | 5.5 in | |
| October | 47°F (8°C) | 4.8 in | |
| November | 34°F (1°C) | 4.5 in | |
| December | 23°F (-5°C) | 3.5 in |
Wassamu has a seasonal temperature swing of 52°F / from 15°F in January to 68°F in August. Total annual precipitation is 42.9 inches, with August being the wettest month (5.6") and February the driest (2.0").