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Weather & Climate in Shonai, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Shonai experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 33°F in January while summers reach 74°F in July. The area gets 208 sunny days per year. Annual precipitation totals 70.8 inches (wetter than the 38-inch national average). The area receives 10.9 inches of snow annually. The city sits at an elevation of 23 feet.
Temperature
33°F Jan (1°C)
74°F Jul (23°C)
| Annual Average | 53.4°F |
| 1% below US avg | |
| January Average | 33°F (1°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 208 days/yr |
Geography
| Elevation | 23 ft (7 m) |
| Area | 234.0 sq mi (606.0 km²) |
| Population Density | 90/sq mi |
| Coordinates | 38.8485°N, 139.9031°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
506 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.0.
| May 26, 2003 | 27 km SSW of ?funato, Japan | M7.0 | 144 km | 68 km |
| Jun 13, 2008 | 24 km WSW of Mizusawa, Japan | M6.9 | 87 km | 8 km |
| Dec 2, 2001 | 3 km NW of Hanamaki, Japan | M6.5 | 119 km | 124 km |
| Jun 18, 2019 | 31 km WSW of Tsuruoka, Japan | M6.4 | 44 km | 12 km |
| Jul 25, 2003 | 7 km NW of Matsushima, Japan | M6.1 | 107 km | 6 km |
| Aug 10, 1996 | 25 km NE of Shinj?, Japan | M6.0 | 55 km | 10 km |
| Sep 3, 1998 | 19 km W of Shizukuishi, Japan | M5.9 | 121 km | 38 km |
| Apr 11, 2011 | 14 km SSE of Marumori, Japan | M5.8 | 142 km | 10 km |
| Nov 27, 1993 | 9 km NNE of Wakuya, Japan | M5.8 | 112 km | 104 km |
| Apr 16, 2008 | 6 km ENE of Yuza, Japan | M5.8 | 22 km | 166 km |
| Aug 10, 1996 | 31 km ENE of Shinj?, Japan | M5.7 | 63 km | 10 km |
| Jan 22, 1992 | 8 km WNW of Higashine, Japan | M5.7 | 55 km | 116 km |
| Oct 26, 1997 | 8 km WSW of Yokote, Japan | M5.6 | 69 km | 134 km |
| Aug 10, 1996 | 26 km S of Yuzawa, Japan | M5.5 | 57 km | 10 km |
| Jul 25, 2003 | 8 km NW of Matsushima, Japan | M5.5 | 106 km | 10 km |
| Jun 14, 2014 | 12 km WNW of Hanamaki, Japan | M5.5 | 114 km | 92 km |
| Jun 14, 2008 | 35 km SSE of Yuzawa, Japan | M5.5 | 67 km | 6 km |
| May 12, 2002 | 12 km WSW of Kitakami, Japan | M5.4 | 103 km | 96 km |
| Jun 14, 2008 | 27 km WSW of Mizusawa, Japan | M5.4 | 84 km | 10 km |
| Apr 1, 1995 | 8 km NE of Kameda-honch?, Japan | M5.4 | 120 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
10 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2019 | Faxai | Category 1 | 86 mph | 277 km |
| 2019 | Hagibis | Category 1 | 75 mph | 180 km |
| 2004 | Ma-on | Category 2 | 63 mph | 268 km |
| 2002 | Higos | Category 1 | 75 mph | 106 km |
| 2001 | Danas | Category 1 | 58 mph | 276 km |
| 2000 | Kirogi | Category 1 | 69 mph | 217 km |
| 1998 | Vicki | Category 2 | 63 mph | 58 km |
| 1998 | Stella | Category 1 | 63 mph | 295 km |
| 1995 | Ryan | Category 1 | 40 mph | 188 km |
| 1993 | Vernon | Category 1 | 69 mph | 231 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
11 tsunamis recorded within 500 km. Highest wave on record: 9.0 m (30 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1833 | NW. HONSHU ISLAND | Earthquake | 9.0 m | 85 | 65 km |
| 1964 | NW. HONSHU ISLAND | Earthquake | 5.8 m | 36 | 78 km |
| 2008 | ARATOZAWA, JAPAN | Eruption + Earthquake | 2.5 m | 23 | 87 km |
| 1939 | NW. HONSHU ISLAND | Earthquake | 1.2 m | 27 | 143 km |
| 1810 | NW. HONSHU ISLAND | Earthquake | 1.0 m | 57 | 117 km |
| 1804 | NW. HONSHU ISLAND | Earthquake | 1.0 m | 450 | 23 km |
| 2019 | NIIGATA | Earthquake | 0.1 m | — | 44 km |
| 1894 | YAMAGATA, JAPAN | Earthquake | — | 726 | 11 km |
| 1762 | NW. HONSHU ISLAND | Earthquake | — | — | 134 km |
| 1644 | HONJO, AKITA | Earthquake | — | 117 | 64 km |
| 850 | NW. HONSHU ISLAND | Eruption + Earthquake | — | — | 17 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
14 volcanoes within 200 km. Closest: Chokaisan (31 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Chokaisan | Stratovolcano(es) | 2,236 m (7,336 ft) | 1974 | 31 km |
| Naruko | Caldera | 470 m (1,542 ft) | 837 | 73 km |
| Kurikomayama | Stratovolcano | 1,627 m (5,338 ft) | 1950 | 78 km |
| Zaozan [Zaosan] | Complex | 1,841 m (6,040 ft) | 1940 | 91 km |
| Megata | Maar(s) | 291 m (955 ft) | -2050 | 123 km |
| Azumayama | Stratovolcano(es) | 1,949 m (6,394 ft) | 1977 | 127 km |
| Akita-Komagatake | Stratovolcano(es) | 1,637 m (5,371 ft) | 1971 | 127 km |
| Adatarayama | Stratovolcano(es) | 1,728 m (5,669 ft) | 1996 | 138 km |
| Bandaisan | Stratovolcano | 1,816 m (5,958 ft) | 1888 | 140 km |
| Akita-Yakeyama | Stratovolcano | 1,366 m (4,482 ft) | 1997 | 144 km |
| Iwatesan | Complex | 2,038 m (6,686 ft) | 1919 | 146 km |
| Hachimantai | Stratovolcano | 1,613 m (5,292 ft) | -5350 | 148 km |
| Numazawa | Shield | 835 m (2,740 ft) | -3400 | 159 km |
| Nasudake | Stratovolcano(es) | 1,915 m (6,283 ft) | 1963 | 192 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (1°C) | 6.3 in | Coldest |
| February | 33°F (1°C) | 4.7 in | |
| March | 38°F (3°C) | 4.1 in | |
| April | 49°F (10°C) | 4.2 in | |
| May | 59°F (15°C) | 3.9 in | Driest |
| June | 67°F (19°C) | 4.8 in | |
| July | 74°F (23°C) | 6.9 in | |
| August | 77°F (25°C) | 6.8 in | Warmest |
| September | 69°F (20°C) | 6.8 in | |
| October | 58°F (14°C) | 6.3 in | |
| November | 47°F (8°C) | 8.2 in | Wettest |
| December | 38°F (3°C) | 7.9 in |
Shonai has a seasonal temperature swing of 44°F / from 33°F in January to 77°F in August. Total annual precipitation is 70.8 inches, with November being the wettest month (8.2") and May the driest (3.9").