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Weather & Climate in Toyokoro, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Toyokoro has a cool climate with an average annual temperature of 43°F (6°C). Winters average 16°F in January while summers reach 64°F in July. The area gets 263 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 40.5 inches. The area receives 8.2 inches of snow annually. The city sits at an elevation of 141 feet.
Temperature
16°F Jan (-9°C)
64°F Jul (18°C)
| Annual Average | 42.7°F |
| 21% below US avg | |
| January Average | 16°F (-9°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 263 days/yr |
Geography
| Elevation | 141 ft (43 m) |
| Area | 281.8 sq mi (729.9 km²) |
| Population Density | 12/sq mi |
| Coordinates | 42.8257°N, 143.5518°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
1,389 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M8.2.
| Sep 25, 2003 | 2003 Tokachi-Oki Earthquake | M8.2 | 116 km | 27 km |
| Jan 15, 1993 | 52 km NE of Otofuke, Japan | M7.6 | 54 km | 102 km |
| Sep 25, 2003 | 119 km ESE of Shizunai-furukawach?, Japan | M7.4 | 117 km | 33 km |
| Feb 2, 2013 | 18 km SSW of Obihiro, Japan | M6.9 | 38 km | 107 km |
| Jan 14, 2016 | 52 km SE of Shizunai-furukawach?, Japan | M6.7 | 114 km | 46 km |
| Oct 8, 2003 | 39 km SSE of Kushiro, Japan | M6.7 | 86 km | 32 km |
| Sep 29, 2003 | 58 km S of Kushiro, Japan | M6.5 | 80 km | 25 km |
| Jun 5, 2009 | 105 km ESE of Shizunai-furukawach?, Japan | M6.4 | 112 km | 29 km |
| Nov 26, 1991 | 33 km SSE of Shizunai-furukawach?, Japan | M6.4 | 121 km | 56 km |
| Jan 18, 2005 | 40 km E of Kushiro, Japan | M6.3 | 108 km | 42 km |
| Jun 11, 2023 | 20 km WSW of Biratori, Japan | M6.2 | 139 km | 121 km |
| May 12, 1999 | 44 km W of Kushiro, Japan | M6.2 | 33 km | 103 km |
| Jan 15, 1993 | 17 km W of Kushiro, Japan | M6.1 | 53 km | 112 km |
| Apr 11, 2004 | 38 km E of Kushiro, Japan | M6.1 | 105 km | 42 km |
| Oct 21, 2011 | 16 km NE of Asahikawa, Japan | M6.1 | 147 km | 187 km |
| Feb 17, 2007 | 115 km ESE of Shizunai-furukawach?, Japan | M6.0 | 115 km | 31 km |
| May 31, 2025 | 78 km S of Kushiro, Japan | M6.0 | 99 km | 21 km |
| Sep 26, 2003 | 110 km S of Kushiro, Japan | M6.0 | 126 km | 33 km |
| Feb 20, 1997 | 61 km SSE of Shizunai-furukawach?, Japan | M6.0 | 126 km | 33 km |
| Mar 25, 1993 | 108 km ESE of Shizunai-furukawach?, Japan | M6.0 | 114 km | 34 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
1 hurricane (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2000 | Sonamu | Category 1 | 58 mph | 256 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
8 tsunamis recorded within 500 km. Highest wave on record: 6.5 m (21 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1952 | SE. HOKKAIDO ISLAND | Earthquake | 6.5 m | 33 | 79 km |
| 2003 | HOKKAIDO ISLAND | Earthquake | 4.4 m | 2 | 116 km |
| 1982 | HOKKAIDO ISLAND | Earthquake | 1.3 m | 110 | 123 km |
| 1938 | E. HOKKAIDO ISLAND | Earthquake | 0.9 m | 1 | 105 km |
| 1952 | SE. HOKKAIDO ISLAND | Earthquake | 0.3 m | — | 125 km |
| 2004 | HOKKAIDO ISLAND | Earthquake | 0.1 m | — | 129 km |
| 1962 | SE. HOKKAIDO ISLAND | Earthquake | 0.1 m | — | 75 km |
| 2008 | HOKKAIDO ISLAND | Earthquake | 0.1 m | 6 | 105 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
10 volcanoes within 200 km. Closest: Akan (73 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Akan | Caldera | 1,499 m (4,918 ft) | 2008 | 73 km |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 78 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 96 km |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 109 km |
| Kussharo | Caldera | 574 m (1,883 ft) | 1320 | 113 km |
| Mashu | Caldera | 857 m (2,812 ft) | 1080 | 117 km |
| Shikotsu | Caldera | 1,320 m (4,331 ft) | 1979 | 178 km |
| Tomariyama [Golovnin] | Caldera | 535 m (1,755 ft) | 1848 | 194 km |
| Shiretoko-Iozan | Stratovolcano | 1,562 m (5,125 ft) | 1936 | 195 km |
| Kuttara | Stratovolcano(es) | 549 m (1,801 ft) | 1820 | 199 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 16°F (-9°C) | 2.2 in | Coldest |
| February | 18°F (-8°C) | 1.5 in | Driest |
| March | 28°F (-2°C) | 2.6 in | |
| April | 41°F (5°C) | 2.8 in | |
| May | 50°F (10°C) | 3.5 in | |
| June | 57°F (14°C) | 3.6 in | |
| July | 64°F (18°C) | 4.2 in | |
| August | 67°F (20°C) | 4.8 in | Warmest |
| September | 61°F (16°C) | 6.4 in | Wettest |
| October | 49°F (10°C) | 4.3 in | |
| November | 37°F (3°C) | 2.8 in | |
| December | 24°F (-4°C) | 1.9 in |
Toyokoro has a seasonal temperature swing of 51°F / from 16°F in January to 67°F in August. Total annual precipitation is 40.5 inches, with September being the wettest month (6.4") and February the driest (1.5").