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Weather & Climate in Semboku, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Semboku 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 224 sunny days per year, above the national average. Annual precipitation totals 61.6 inches (wetter than the 38-inch national average). The area receives 16.3 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 1,276 feet.
Temperature
23°F Jan (-5°C)
67°F Jul (20°C)
| Annual Average | 45.2°F |
| 16% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 67°F (20°C) |
| Sunny Days | 224 days/yr |
Geography
| Elevation | 1,276 ft (389 m) |
| Area | 446.0 sq mi (1,155.1 km²) |
| Population Density | 58/sq mi |
| Coordinates | 39.7093°N, 140.7465°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
1,085 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.0.
| Jan 6, 1995 | 63 km ESE of Hachinohe, Japan | M7.0 | 136 km | 27 km |
| May 26, 2003 | 27 km SSW of ?funato, Japan | M7.0 | 119 km | 68 km |
| Jun 13, 2008 | 24 km WSW of Mizusawa, Japan | M6.9 | 76 km | 8 km |
| Jul 23, 2008 | 29 km ENE of Morioka, Japan | M6.8 | 62 km | 108 km |
| May 12, 2015 | 32 km SE of ?funato, Japan | M6.8 | 142 km | 35 km |
| Jun 22, 2011 | 41 km NNE of Miyako, Japan | M6.7 | 128 km | 33 km |
| Dec 2, 2001 | 3 km NW of Hanamaki, Japan | M6.5 | 45 km | 124 km |
| Nov 3, 2002 | 30 km SE of ?funato, Japan | M6.4 | 140 km | 39 km |
| Jul 23, 2011 | 21 km SSE of ?funato, Japan | M6.3 | 129 km | 41 km |
| Apr 19, 2020 | 31 km SE of ?funato, Japan | M6.3 | 141 km | 38 km |
| Jun 17, 2012 | 19 km SSE of ?funato, Japan | M6.3 | 128 km | 36 km |
| Jul 4, 2010 | 37 km E of Miyako, Japan | M6.3 | 139 km | 27 km |
| Mar 17, 2011 | 57 km NNE of Miyako, Japan | M6.2 | 130 km | 29 km |
| Mar 25, 2011 | 36 km SSE of ?funato, Japan | M6.2 | 143 km | 39 km |
| Jul 25, 2003 | 7 km NW of Matsushima, Japan | M6.1 | 146 km | 6 km |
| Mar 27, 2012 | 24 km NNE of Miyako, Japan | M6.1 | 110 km | 15 km |
| Aug 10, 1996 | 25 km NE of Shinj?, Japan | M6.0 | 91 km | 10 km |
| Mar 31, 2011 | 18 km SSE of ?funato, Japan | M6.0 | 127 km | 42 km |
| Sep 3, 1998 | 19 km W of Shizukuishi, Japan | M5.9 | 1 km | 38 km |
| Apr 1, 2011 | 6 km SE of ?tsuchi, Japan | M5.9 | 112 km | 41 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
6 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2019 | Hagibis | Category 1 | 69 mph | 191 km |
| 2002 | Higos | Category 1 | 75 mph | 104 km |
| 2000 | Kirogi | Category 1 | 63 mph | 189 km |
| 1998 | Vicki | Category 1 | 58 mph | 78 km |
| 1995 | Ryan | Category 1 | 40 mph | 227 km |
| 1993 | Vernon | Category 1 | 69 mph | 287 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
11 tsunamis recorded within 500 km. Highest wave on record: 2.5 m (8 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2008 | ARATOZAWA, JAPAN | Eruption + Earthquake | 2.5 m | 23 | 76 km |
| 1793 | W. OFF AOMORI | Earthquake | 1.8 m | 12 | 144 km |
| 1939 | NW. HONSHU ISLAND | Earthquake | 1.2 m | 27 | 115 km |
| 1810 | NW. HONSHU ISLAND | Earthquake | 1.0 m | 57 | 75 km |
| 1804 | NW. HONSHU ISLAND | Earthquake | 1.0 m | 450 | 100 km |
| 1912 | SANRIKU | Earthquake | 0.5 m | - | 138 km |
| 1894 | YAMAGATA, JAPAN | Earthquake | - | 726 | 121 km |
| 1766 | SANRIKU | Earthquake | - | 1,700 | 133 km |
| 1644 | HONJO, AKITA | Earthquake | - | 117 | 65 km |
| 1088 | MIYAKO, IWATE PREFECTURE | Earthquake | - | - | 104 km |
| 850 | NW. HONSHU ISLAND | Eruption + Earthquake | - | - | 107 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
13 volcanoes within 200 km. Closest: Akita-Komagatake (7 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Akita-Komagatake | Stratovolcano(es) | 1,637 m (5,371 ft) | 1971 | 7 km |
| Iwatesan | Complex | 2,038 m (6,686 ft) | 1919 | 27 km |
| Akita-Yakeyama | Stratovolcano | 1,366 m (4,482 ft) | 1997 | 28 km |
| Hachimantai | Stratovolcano | 1,613 m (5,292 ft) | -5350 | 29 km |
| Kurikomayama | Stratovolcano | 1,627 m (5,338 ft) | 1950 | 83 km |
| Towada | Caldera | 1,011 m (3,317 ft) | 915 | 90 km |
| Chokaisan | Stratovolcano(es) | 2,236 m (7,336 ft) | 1974 | 91 km |
| Megata | Maar(s) | 291 m (955 ft) | -2050 | 91 km |
| Hakkodasan | Stratovolcano(es) | 1,585 m (5,200 ft) | 1550 | 106 km |
| Naruko | Caldera | 470 m (1,542 ft) | 837 | 109 km |
| Iwakisan | Stratovolcano | 1,625 m (5,331 ft) | 1863 | 112 km |
| Zaozan [Zaosan] | Complex | 1,841 m (6,040 ft) | 1940 | 176 km |
| Osorezan | Stratovolcano | 878 m (2,881 ft) | 1787 | 177 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 23°F (-5°C) | 4.2 in | Coldest |
| February | 23°F (-5°C) | 3.5 in | Driest |
| March | 29°F (-2°C) | 3.8 in | |
| April | 41°F (5°C) | 4.4 in | |
| May | 51°F (11°C) | 4.1 in | |
| June | 60°F (15°C) | 5.1 in | |
| July | 67°F (20°C) | 7.4 in | Wettest |
| August | 70°F (21°C) | 7.2 in | Warmest |
| September | 61°F (16°C) | 6.9 in | |
| October | 50°F (10°C) | 5.1 in | |
| November | 39°F (4°C) | 5.0 in | |
| December | 29°F (-2°C) | 4.8 in |
Semboku has a seasonal temperature swing of 47°F / from 23°F in January to 70°F in August. Total annual precipitation is 61.6 inches, with July being the wettest month (7.4") and February the driest (3.5").