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. 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) |
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°E |
| 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").