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Weather & Climate in Minami-Sōma, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Minami-Sōma experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 35°F in January while summers reach 71°F in July. The area gets 246 sunny days per year, above the national average. Annual precipitation totals 49.8 inches (wetter than the 38-inch national average). The area receives 3.2 inches of snow annually. The city sits at an elevation of 89 feet.
Temperature
35°F Jan (1°C)
71°F Jul (22°C)
| Annual Average | 53.3°F |
| 1% below US avg | |
| January Average | 35°F (1°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 89 ft (27 m) |
| Area | 153.9 sq mi (398.6 km²) |
| Population Density | 383/sq mi |
| Coordinates | 37.6291°N, 140.9787°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
3,620 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M9.1.
| Mar 11, 2011 | 2011 Great Tohoku Earthquake, Japan | M9.1 | 143 km | 29 km |
| Mar 16, 2022 | 57 km ENE of Namie, Japan | M7.3 | 54 km | 41 km |
| Feb 13, 2021 | 73 km ENE of Namie, Japan | M7.1 | 71 km | 44 km |
| Apr 7, 2011 | 29 km ESE of Ishinomaki, Japan | M7.1 | 90 km | 42 km |
| Oct 31, 2003 | 133 km ESE of Ishinomaki, Japan | M7.0 | 146 km | 10 km |
| Jul 19, 2008 | 107 km E of Namie, Japan | M7.0 | 109 km | 22 km |
| May 26, 2003 | 27 km SSW of ?funato, Japan | M7.0 | 145 km | 68 km |
| Mar 20, 2021 | 30 km E of Ishinomaki, Japan | M7.0 | 109 km | 43 km |
| May 1, 2021 | 30 km SSE of Onagawa Ch?, Japan | M6.9 | 84 km | 43 km |
| Feb 16, 1996 | 123 km E of Namie, Japan | M6.7 | 127 km | 41 km |
| Apr 11, 2011 | 17 km SSW of Ishikawa, Japan | M6.6 | 87 km | 11 km |
| Mar 12, 2011 | 146 km E of Namie, Japan | M6.5 | 147 km | 20 km |
| Jul 11, 2014 | 139 km ESE of Namie, Japan | M6.5 | 148 km | 20 km |
| Mar 14, 2010 | 59 km ENE of Namie, Japan | M6.5 | 55 km | 32 km |
| Mar 11, 2011 | near the east coast of Honshu, Japan | M6.3 | 138 km | 25 km |
| Jul 24, 2011 | 43 km NE of Namie, Japan | M6.3 | 38 km | 40 km |
| Mar 11, 2011 | 30 km NNE of Namie, Japan | M6.3 | 20 km | 32 km |
| Aug 4, 2019 | 61 km ENE of Namie, Japan | M6.3 | 57 km | 38 km |
| Jul 30, 2011 | 13 km SSE of Iwaki, Japan | M6.3 | 76 km | 38 km |
| Mar 11, 2011 | 103 km E of Namie, Japan | M6.3 | 104 km | 51 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
21 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Ampil | Category 3 | 98 mph | 257 km |
| 2024 | Jebi | Category 1 | 75 mph | 217 km |
| 2019 | Faxai | Category 2 | 92 mph | 112 km |
| 2019 | Hagibis | Category 1 | 81 mph | 92 km |
| 2016 | Lionrock | Category 1 | 75 mph | 241 km |
| 2011 | Roke | Category 1 | 81 mph | 249 km |
| 2007 | Fitow | Category 1 | 75 mph | 276 km |
| 2005 | Mawar | Category 2 | 75 mph | 165 km |
| 2004 | Ma-on | Category 3 | 81 mph | 103 km |
| 2002 | Higos | Category 1 | 81 mph | 65 km |
| 2001 | Danas | Category 1 | 63 mph | 146 km |
| 2000 | Sonamu | Category 1 | 63 mph | 234 km |
| 2000 | Kirogi | Category 1 | 81 mph | 92 km |
| 1998 | Vicki | Category 1 | 58 mph | 169 km |
| 1998 | Stella | Category 1 | 63 mph | 195 km |
| 1996 | Violet | Category 1 | 81 mph | 173 km |
| 1996 | Dan | Category 1 | 58 mph | 280 km |
| 1995 | Oscar | Category 3 | 98 mph | 213 km |
| 1993 | Vernon | Category 1 | 75 mph | 66 km |
| 1981 | Thad | Category 1 | — | 197 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
20 tsunamis recorded within 500 km. Highest wave on record: 39.3 m (129 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2011 | HONSHU ISLAND | Earthquake | 39.3 m | 18,423 | 143 km |
| 1835 | SANRIKU | Earthquake | 5.0 m | — | 86 km |
| 1861 | OFF MIYAGI | Earthquake | 3.9 m | — | 132 km |
| 2016 | E. COAST HONSHU ISLAND | Earthquake | 1.4 m | — | 45 km |
| 1938 | OFF FUKUSHIMA PREFECTURE | Earthquake | 1.3 m | — | 74 km |
| 1938 | OFF FUKUSHIMA PREFECTURE | Earthquake | 1.3 m | — | 95 km |
| 1897 | SANRIKU | Earthquake | 1.0 m | — | 96 km |
| 1938 | JAPAN TRENCH | Earthquake | 0.8 m | — | 110 km |
| 1959 | SANRIKU | Earthquake | 0.8 m | — | 109 km |
| 1938 | SANRIKU | Earthquake | 0.8 m | — | 84 km |
| 1936 | SANRIKU | Earthquake | 0.7 m | — | 125 km |
| 1978 | SANRIKU | Earthquake | 0.6 m | 28 | 111 km |
| 1938 | SANRIKU | Earthquake | 0.6 m | 1 | 87 km |
| 1938 | SANRIKU | Earthquake | 0.6 m | — | 80 km |
| 2003 | E. HONSHU ISLAND | Earthquake | 0.3 m | — | 146 km |
| 2022 | OFF FUKUSHIMA PREFECTURE | Earthquake | 0.3 m | 4 | 54 km |
| 1938 | SANRIKU | Earthquake | 0.3 m | — | 143 km |
| 1896 | KASHIMA, JAPAN | Earthquake | 0.3 m | — | 126 km |
| 2014 | SANRIKU | Earthquake | 0.2 m | — | 148 km |
| 2008 | OFF EAST COAST OF HONSHU ISLAND | Earthquake | 0.2 m | — | 109 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Adatarayama (62 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Adatarayama | Stratovolcano(es) | 1,728 m (5,669 ft) | 1996 | 62 km |
| Azumayama | Stratovolcano(es) | 1,949 m (6,394 ft) | 1977 | 66 km |
| Zaozan [Zaosan] | Complex | 1,841 m (6,040 ft) | 1940 | 74 km |
| Bandaisan | Stratovolcano | 1,816 m (5,958 ft) | 1888 | 80 km |
| Nasudake | Stratovolcano(es) | 1,915 m (6,283 ft) | 1963 | 106 km |
| Naruko | Caldera | 470 m (1,542 ft) | 837 | 124 km |
| Numazawa | Shield | 835 m (2,740 ft) | -3400 | 126 km |
| Takaharayama | Stratovolcano | 1,795 m (5,889 ft) | -4570 | 134 km |
| Kurikomayama | Stratovolcano | 1,627 m (5,338 ft) | 1950 | 149 km |
| Omanago Group | Lava dome(s) | 2,341 m (7,680 ft) | -3050 | 160 km |
| Nantaisan | Stratovolcano | 2,486 m (8,156 ft) | -9540 | 163 km |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 168 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 169 km |
| Chokaisan | Stratovolcano(es) | 2,236 m (7,336 ft) | 1974 | 182 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 198 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (1°C) | 1.2 in | Coldest, Driest |
| February | 35°F (2°C) | 2.0 in | |
| March | 40°F (4°C) | 2.9 in | |
| April | 50°F (10°C) | 4.1 in | |
| May | 58°F (15°C) | 4.3 in | |
| June | 64°F (18°C) | 6.0 in | |
| July | 71°F (22°C) | 5.7 in | |
| August | 74°F (23°C) | 6.0 in | Warmest |
| September | 68°F (20°C) | 7.5 in | Wettest |
| October | 58°F (14°C) | 5.9 in | |
| November | 48°F (9°C) | 2.7 in | |
| December | 39°F (4°C) | 1.5 in |
Minami-Sōma has a seasonal temperature swing of 40°F / from 35°F in January to 74°F in August. Total annual precipitation is 49.8 inches, with September being the wettest month (7.5") and January the driest (1.2").