All Countries
Weather & Climate in Rumoi, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Rumoi 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 249 sunny days per year, above the national average. Annual precipitation totals 48.2 inches (wetter than the 38-inch national average). The area receives 15.0 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 115 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 | 249 days/yr |
Geography
| Elevation | 115 ft (35 m) |
| Area | 115.0 sq mi (297.9 km²) |
| Population Density | 230/sq mi |
| Coordinates | 43.9344°N, 141.6428°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
317 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.2.
| Jan 11, 2016 | 74 km NW of Rumoi, Japan | M6.2 | 75 km | 239 km |
| Oct 21, 2011 | 16 km NE of Asahikawa, Japan | M6.1 | 67 km | 187 km |
| Jan 12, 2021 | 84 km NW of Yoichi, Japan | M5.9 | 135 km | 214 km |
| Feb 19, 2003 | 26 km NNE of Rumoi, Japan | M5.9 | 27 km | 214 km |
| May 23, 1995 | Hokkaido, Japan region | M5.6 | 32 km | 17 km |
| Apr 18, 2007 | 21 km E of Tomakomai, Japan | M5.5 | 143 km | 120 km |
| Jul 8, 2014 | 13 km N of Shiraoi, Japan | M5.5 | 143 km | 10 km |
| Jan 22, 2013 | 77 km SSW of Rishiri Town, Japan | M5.4 | 82 km | 235 km |
| Feb 21, 2019 | 25 km ESE of Chitose, Japan | M5.4 | 133 km | 28 km |
| Jun 20, 2021 | 29 km NE of Shimo-furano, Japan | M5.3 | 89 km | 152 km |
| Jul 1, 2017 | 22 km E of Chitose, Japan | M5.3 | 127 km | 37 km |
| Aug 15, 1990 | 43 km ESE of Kamikawa, Japan | M5.3 | 134 km | 162 km |
| Jan 27, 2021 | 27 km ESE of Chitose, Japan | M5.2 | 138 km | 116 km |
| Jul 5, 2024 | 10 km WNW of Nayoro, Japan | M5.1 | 73 km | 232 km |
| Feb 21, 1990 | 27 km SSW of Nayoro, Japan | M5.1 | 56 km | 33 km |
| Nov 10, 1990 | 23 km W of Nayoro, Japan | M5.1 | 63 km | 16 km |
| Aug 10, 2022 | 51 km SSE of Makubetsu, Japan | M5.1 | 118 km | 10 km |
| Aug 13, 2013 | 35 km WSW of Kitami, Japan | M5.1 | 149 km | 178 km |
| May 10, 2005 | 35 km E of Kamikawa, Japan | M5.0 | 126 km | 161 km |
| Apr 29, 1994 | 29 km W of Otofuke, Japan | M5.0 | 145 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 | — | 54 km |
| 1863 | NW. HOKKAIDO ISLAND | Earthquake | — | — | 75 km |
| 1834 | W. HOKKAIDO ISLAND | Earthquake | — | — | 73 km |
| 1792 | W. HOKKAIDO ISLAND | Earthquake | — | — | 97 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
8 volcanoes within 200 km. Closest: Tokachidake (102 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 102 km |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 102 km |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 126 km |
| Shikotsu | Caldera | 1,320 m (4,331 ft) | 1979 | 140 km |
| Yoteizan | Stratovolcano | 1,888 m (6,194 ft) | -1050 | 140 km |
| Niseko | Stratovolcano(es) | 1,308 m (4,291 ft) | -4900 | 142 km |
| Kuttara | Stratovolcano(es) | 549 m (1,801 ft) | 1820 | 165 km |
| Toya | Stratovolcano | 733 m (2,405 ft) | 2001 | 168 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 4.3 in | Coldest |
| February | 23°F (-5°C) | 3.0 in | |
| March | 29°F (-2°C) | 2.5 in | |
| April | 41°F (5°C) | 2.2 in | Driest |
| May | 51°F (10°C) | 2.4 in | |
| June | 59°F (15°C) | 2.7 in | |
| July | 67°F (19°C) | 3.8 in | |
| August | 69°F (21°C) | 5.7 in | Warmest, Wettest |
| September | 61°F (16°C) | 5.6 in | |
| October | 50°F (10°C) | 5.2 in | |
| November | 39°F (4°C) | 5.5 in | |
| December | 29°F (-2°C) | 5.3 in |
Rumoi has a seasonal temperature swing of 46°F / from 23°F in January to 69°F in August. Total annual precipitation is 48.2 inches, with August being the wettest month (5.7") and April the driest (2.2").