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Weather & Climate in Yoichi, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Yoichi has a cool climate with an average annual temperature of 45°F (7°C). Winters average 23°F in January while summers reach 67°F in July. The area gets 240 sunny days per year, above the national average. Annual precipitation totals 52.8 inches (wetter than the 38-inch national average). The area receives 19.9 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 7 feet.
Temperature
23°F Jan (-5°C)
67°F Jul (19°C)
| Annual Average | 44.9°F |
| 17% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 240 days/yr |
Geography
| Elevation | 7 ft (2 m) |
| Area | 54.3 sq mi (140.6 km²) |
| Population Density | 350/sq mi |
| Coordinates | 43.2039°N, 140.7703°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
437 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.7.
| Jul 12, 1993 | 107 km W of Iwanai, Japan | M7.7 | 134 km | 17 km |
| Dec 22, 1996 | 131 km W of Iwanai, Japan | M6.5 | 150 km | 227 km |
| Jul 12, 1993 | 109 km W of Iwanai, Japan | M6.3 | 129 km | 33 km |
| Jun 11, 2023 | 20 km WSW of Biratori, Japan | M6.2 | 119 km | 121 km |
| Jan 11, 2016 | 74 km NW of Rumoi, Japan | M6.2 | 144 km | 239 km |
| Aug 24, 1992 | 9 km NNW of Honch?, Japan | M6.2 | 137 km | 121 km |
| Jul 12, 1993 | 101 km W of Iwanai, Japan | M6.0 | 128 km | 29 km |
| Jan 12, 2021 | 84 km NW of Yoichi, Japan | M5.9 | 84 km | 214 km |
| Feb 19, 2003 | 26 km NNE of Rumoi, Japan | M5.9 | 134 km | 214 km |
| May 23, 1995 | Hokkaido, Japan region | M5.6 | 93 km | 17 km |
| Feb 28, 2009 | 37 km NW of Shizunai-furukawach?, Japan | M5.5 | 127 km | 105 km |
| Sep 19, 1993 | 111 km W of Iwanai, Japan | M5.5 | 132 km | 19 km |
| Apr 18, 2007 | 21 km E of Tomakomai, Japan | M5.5 | 108 km | 120 km |
| Jul 8, 2014 | 13 km N of Shiraoi, Japan | M5.5 | 76 km | 10 km |
| Feb 21, 2019 | 25 km ESE of Chitose, Japan | M5.4 | 108 km | 28 km |
| Jul 12, 1993 | 88 km W of Iwanai, Japan | M5.4 | 112 km | 33 km |
| Jan 22, 2013 | 77 km SSW of Rishiri Town, Japan | M5.4 | 143 km | 235 km |
| Jul 1, 2017 | 22 km E of Chitose, Japan | M5.3 | 104 km | 37 km |
| Nov 3, 2001 | 115 km NW of Yoichi, Japan | M5.3 | 115 km | 221 km |
| Jul 16, 1993 | 94 km WNW of Iwanai, Japan | M5.3 | 110 km | 25 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
5 tsunamis recorded within 500 km. Highest wave on record: 32.0 m (105 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1993 | SEA OF JAPAN | Earthquake | 32.0 m | 231 | 134 km |
| 1640 | SE. HOKKAIDO ISLAND | Explosion | 8.0 m | 700 | 126 km |
| 1947 | W. HOKKAIDO ISLAND | Earthquake | 2.0 m | - | 69 km |
| 1834 | W. HOKKAIDO ISLAND | Earthquake | - | - | 52 km |
| 1792 | W. HOKKAIDO ISLAND | Earthquake | - | - | 36 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
10 volcanoes within 200 km. Closest: Niseko (38 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Niseko | Stratovolcano(es) | 1,308 m (4,291 ft) | -4900 | 38 km |
| Yoteizan | Stratovolcano | 1,888 m (6,194 ft) | -1050 | 42 km |
| Toya | Stratovolcano | 733 m (2,405 ft) | 2001 | 74 km |
| Shikotsu | Caldera | 1,320 m (4,331 ft) | 1979 | 76 km |
| Kuttara | Stratovolcano(es) | 549 m (1,801 ft) | 1820 | 85 km |
| Hokkaido-Komagatake | Stratovolcano | 1,131 m (3,711 ft) | 2000 | 127 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 157 km |
| Esan | Lava dome(s) | 618 m (2,028 ft) | 1874 | 159 km |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 176 km |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 185 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 6.3 in | Coldest, Wettest |
| February | 24°F (-5°C) | 4.5 in | |
| March | 30°F (-1°C) | 3.2 in | |
| April | 41°F (5°C) | 2.6 in | |
| May | 51°F (10°C) | 2.6 in | Driest |
| June | 58°F (15°C) | 2.7 in | |
| July | 67°F (19°C) | 3.8 in | |
| August | 69°F (21°C) | 5.2 in | Warmest |
| September | 61°F (16°C) | 5.5 in | |
| October | 50°F (10°C) | 4.8 in | |
| November | 38°F (3°C) | 5.7 in | |
| December | 28°F (-2°C) | 5.9 in |
Yoichi has a seasonal temperature swing of 46°F / from 23°F in January to 69°F in August. Total annual precipitation is 52.9 inches, with January being the wettest month (6.3") and May the driest (2.6").