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Weather & Climate in Tōma, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Tōma has a cool climate with an average annual temperature of 41°F (5°C). Winters average 16°F in January while summers reach 65°F in July. The area gets 261 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 41.4 inches. The area receives 13.4 inches of snow annually. The city sits at an elevation of 489 feet.
Temperature
16°F Jan (-9°C)
65°F Jul (19°C)
| Annual Average | 41.3°F |
| 24% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 65°F (19°C) |
| Sunny Days | 261 days/yr |
Geography
| Elevation | 489 ft (149 m) |
| Area | 79.1 sq mi (204.9 km²) |
| Population Density | 80/sq mi |
| Coordinates | 43.8211°N, 142.5175°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
393 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 | 111 km | 102 km |
| Feb 2, 2013 | 18 km SSW of Obihiro, Japan | M6.9 | 126 km | 107 km |
| May 12, 1999 | 44 km W of Kushiro, Japan | M6.2 | 138 km | 103 km |
| Jan 11, 2016 | 74 km NW of Rumoi, Japan | M6.2 | 135 km | 239 km |
| Oct 21, 2011 | 16 km NE of Asahikawa, Japan | M6.1 | 9 km | 187 km |
| Feb 19, 2003 | 26 km NNE of Rumoi, Japan | M5.9 | 68 km | 214 km |
| Jun 12, 1991 | 17 km SE of Obihiro, Japan | M5.8 | 132 km | 109 km |
| May 23, 1995 | Hokkaido, Japan region | M5.6 | 65 km | 17 km |
| Apr 18, 2007 | 21 km E of Tomakomai, Japan | M5.5 | 140 km | 120 km |
| Feb 28, 2009 | 37 km NW of Shizunai-furukawach?, Japan | M5.5 | 139 km | 105 km |
| Feb 21, 2019 | 25 km ESE of Chitose, Japan | M5.4 | 127 km | 28 km |
| Jan 22, 2013 | 77 km SSW of Rishiri Town, Japan | M5.4 | 144 km | 235 km |
| Jun 20, 2021 | 29 km NE of Shimo-furano, Japan | M5.3 | 30 km | 152 km |
| Jul 1, 2017 | 22 km E of Chitose, Japan | M5.3 | 122 km | 37 km |
| Aug 15, 1990 | 43 km ESE of Kamikawa, Japan | M5.3 | 63 km | 162 km |
| Dec 22, 1997 | 17 km ENE of Otofuke, Japan | M5.3 | 108 km | 115 km |
| Jan 27, 2021 | 27 km ESE of Chitose, Japan | M5.2 | 131 km | 116 km |
| Aug 14, 2015 | 30 km S of Obihiro, Japan | M5.2 | 141 km | 87 km |
| Sep 15, 1995 | 48 km WNW of Kushiro, Japan | M5.2 | 133 km | 106 km |
| Jul 22, 2012 | 46 km ENE of Shizunai-furukawach?, Japan | M5.1 | 144 km | 57 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
5 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 | — | 122 km |
| 1938 | E. HOKKAIDO ISLAND | Earthquake | 0.9 m | 1 | 145 km |
| 1956 | NE. HOKKAIDO ISLAND | Earthquake | 0.4 m | — | 137 km |
| 1863 | NW. HOKKAIDO ISLAND | Earthquake | — | — | 119 km |
| 1834 | W. HOKKAIDO ISLAND | Earthquake | — | — | 107 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
11 volcanoes within 200 km. Closest: Taisetsuzan (32 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 32 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 47 km |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 61 km |
| Akan | Caldera | 1,499 m (4,918 ft) | 2008 | 130 km |
| Kussharo | Caldera | 574 m (1,883 ft) | 1320 | 155 km |
| Shikotsu | Caldera | 1,320 m (4,331 ft) | 1979 | 156 km |
| Mashu | Caldera | 857 m (2,812 ft) | 1080 | 167 km |
| Yoteizan | Stratovolcano | 1,888 m (6,194 ft) | -1050 | 177 km |
| Niseko | Stratovolcano(es) | 1,308 m (4,291 ft) | -4900 | 183 km |
| Kuttara | Stratovolcano(es) | 549 m (1,801 ft) | 1820 | 184 km |
| Toya | Stratovolcano | 733 m (2,405 ft) | 2001 | 197 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 16°F (-9°C) | 2.4 in | Coldest |
| February | 16°F (-9°C) | 1.7 in | Driest |
| March | 25°F (-4°C) | 2.1 in | |
| April | 39°F (4°C) | 2.4 in | |
| May | 50°F (10°C) | 3.0 in | |
| June | 58°F (14°C) | 3.0 in | |
| July | 65°F (19°C) | 4.1 in | |
| August | 67°F (19°C) | 5.6 in | Warmest, Wettest |
| September | 58°F (14°C) | 5.5 in | |
| October | 46°F (8°C) | 4.5 in | |
| November | 34°F (1°C) | 4.0 in | |
| December | 23°F (-5°C) | 3.0 in |
Tōma has a seasonal temperature swing of 51°F / from 16°F in January to 67°F in August. Total annual precipitation is 41.4 inches, with August being the wettest month (5.6") and February the driest (1.7").