All Countries
Weather & Climate in Tomamae, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Tomamae 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 250 sunny days per year, above the national average. Annual precipitation totals 47.5 inches (wetter than the 38-inch national average). The area receives 14.1 inches of snow annually. The city sits at an elevation of 115 feet.
Temperature
23°F Jan (-5°C)
67°F Jul (19°C)
| Annual Average | 45.0°F |
| 17% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 250 days/yr |
Geography
| Elevation | 115 ft (35 m) |
| Area | 175.5 sq mi (454.6 km²) |
| Population Density | 19/sq mi |
| Coordinates | 44.3053°N, 141.6544°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
248 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 | 49 km | 239 km |
| Oct 21, 2011 | 16 km NE of Asahikawa, Japan | M6.1 | 80 km | 187 km |
| Jan 12, 2021 | 84 km NW of Yoichi, Japan | M5.9 | 149 km | 214 km |
| Feb 19, 2003 | 26 km NNE of Rumoi, Japan | M5.9 | 21 km | 214 km |
| May 23, 1995 | Hokkaido, Japan region | M5.6 | 73 km | 17 km |
| Jan 22, 2013 | 77 km SSW of Rishiri Town, Japan | M5.4 | 59 km | 235 km |
| Aug 15, 1990 | 43 km ESE of Kamikawa, Japan | M5.3 | 145 km | 162 km |
| Jun 20, 2021 | 29 km NE of Shimo-furano, Japan | M5.3 | 113 km | 152 km |
| Feb 21, 1990 | 27 km SSW of Nayoro, Japan | M5.1 | 53 km | 33 km |
| May 21, 2013 | 83 km ESE of Makubetsu, Japan | M5.1 | 131 km | 273 km |
| Nov 10, 1990 | 23 km W of Nayoro, Japan | M5.1 | 41 km | 16 km |
| Aug 10, 2022 | 51 km SSE of Makubetsu, Japan | M5.1 | 79 km | 10 km |
| Jul 5, 2024 | 10 km WNW of Nayoro, Japan | M5.1 | 54 km | 232 km |
| Jul 20, 1993 | 33 km W of Nayoro, Japan | M5.0 | 31 km | 18 km |
| May 10, 2005 | 35 km E of Kamikawa, Japan | M5.0 | 137 km | 161 km |
| Oct 4, 1994 | 29 km E of Makubetsu, Japan | M5.0 | 131 km | 33 km |
| Feb 7, 2012 | 37 km ENE of Makubetsu, Japan | M5.0 | 146 km | 315 km |
| Jul 31, 2021 | 16 km NNE of T?betsu, Japan | M5.0 | 106 km | 168 km |
| May 18, 1990 | 4 km ENE of Rumoi, Japan | M4.9 | 40 km | 201 km |
| Feb 7, 2025 | 25 km NNW of Shintoku, Japan | M4.9 | 141 km | 160 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 | — | 77 km |
| 1863 | NW. HOKKAIDO ISLAND | Earthquake | — | — | 35 km |
| 1834 | W. HOKKAIDO ISLAND | Earthquake | — | — | 114 km |
| 1792 | W. HOKKAIDO ISLAND | Earthquake | — | — | 123 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
6 volcanoes within 200 km. Closest: Taisetsuzan (120 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Taisetsuzan | Stratovolcano(es) | 2,291 m (7,516 ft) | 1739 | 120 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 129 km |
| Maruyama | Stratovolcano(es) | 2,013 m (6,604 ft) | 1898 | 148 km |
| Yoteizan | Stratovolcano | 1,888 m (6,194 ft) | -1050 | 178 km |
| Niseko | Stratovolcano(es) | 1,308 m (4,291 ft) | -4900 | 178 km |
| Shikotsu | Caldera | 1,320 m (4,331 ft) | 1979 | 181 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 3.9 in | Coldest |
| February | 23°F (-5°C) | 2.8 in | |
| March | 30°F (-1°C) | 2.4 in | |
| April | 41°F (5°C) | 2.2 in | Driest |
| May | 50°F (10°C) | 2.5 in | |
| June | 58°F (15°C) | 2.7 in | |
| July | 67°F (19°C) | 3.8 in | |
| August | 69°F (21°C) | 5.5 in | Warmest |
| September | 61°F (16°C) | 5.7 in | Wettest |
| October | 51°F (10°C) | 5.4 in | |
| November | 39°F (4°C) | 5.6 in | |
| December | 29°F (-2°C) | 5.0 in |
Tomamae has a seasonal temperature swing of 47°F / from 23°F in January to 69°F in August. Total annual precipitation is 47.5 inches, with September being the wettest month (5.7") and April the driest (2.2").