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Weather & Climate in Kamaishi, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Kamaishi experiences four distinct seasons with an average annual temperature of 51°F (10°C). Winters average 32°F in January while summers reach 68°F in July. The area gets 234 sunny days per year, above the national average. Annual precipitation totals 56.2 inches (wetter than the 38-inch national average). The area receives 4.3 inches of snow annually. The city sits at an elevation of 82 feet.
Temperature
32°F Jan (0°C)
68°F Jul (20°C)
| Annual Average | 50.5°F |
| 6% below US avg | |
| January Average | 32°F (0°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 234 days/yr |
Geography
| Elevation | 82 ft (25 m) |
| Area | 170.0 sq mi (440.4 km²) |
| Population Density | 254/sq mi |
| Coordinates | 39.2769°N, 141.8680°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
2,855 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M9.1.
| Mar 11, 2011 | 2011 Great Tohoku Earthquake, Japan | M9.1 | 117 km | 29 km |
| Mar 9, 2011 | 120 km SE of ?funato, Japan | M7.3 | 126 km | 32 km |
| Apr 7, 2011 | 29 km ESE of Ishinomaki, Japan | M7.1 | 114 km | 42 km |
| Mar 20, 2021 | 30 km E of Ishinomaki, Japan | M7.0 | 94 km | 43 km |
| Jan 6, 1995 | 63 km ESE of Hachinohe, Japan | M7.0 | 111 km | 27 km |
| May 26, 2003 | 27 km SSW of ?funato, Japan | M7.0 | 54 km | 68 km |
| Jun 13, 2008 | 24 km WSW of Mizusawa, Japan | M6.9 | 89 km | 8 km |
| May 1, 2021 | 30 km SSE of Onagawa Ch?, Japan | M6.9 | 122 km | 43 km |
| Jul 18, 1992 | 118 km E of Yamada, Japan | M6.9 | 127 km | 29 km |
| May 12, 2015 | 32 km SE of ?funato, Japan | M6.8 | 44 km | 35 km |
| Jul 23, 2008 | 29 km ENE of Morioka, Japan | M6.8 | 68 km | 108 km |
| Feb 16, 2015 | 83 km ENE of Miyako, Japan | M6.7 | 108 km | 23 km |
| Jun 22, 2011 | 41 km NNE of Miyako, Japan | M6.7 | 81 km | 33 km |
| Mar 11, 2011 | 134 km ESE of Kamaishi, Japan | M6.7 | 134 km | 3 km |
| Sep 16, 2011 | 99 km NE of Miyako, Japan | M6.7 | 135 km | 30 km |
| Mar 11, 2011 | 50 km ESE of ?tsuchi, Japan | M6.6 | 51 km | 26 km |
| Mar 9, 2011 | 128 km SE of ?funato, Japan | M6.5 | 136 km | 15 km |
| Dec 2, 2001 | 3 km NW of Hanamaki, Japan | M6.5 | 68 km | 124 km |
| Jul 18, 1992 | 92 km E of Yamada, Japan | M6.4 | 101 km | 27 km |
| Nov 3, 2002 | 30 km SE of ?funato, Japan | M6.4 | 45 km | 39 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
11 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Jebi | Category 1 | 75 mph | 255 km |
| 2019 | Faxai | Category 1 | 81 mph | 227 km |
| 2019 | Hagibis | Category 1 | 75 mph | 120 km |
| 2004 | Ma-on | Category 2 | 63 mph | 215 km |
| 2002 | Higos | Category 1 | 75 mph | 142 km |
| 2000 | Kirogi | Category 1 | 63 mph | 83 km |
| 2000 | Sonamu | Category 1 | 63 mph | 225 km |
| 1998 | Vicki | Category 1 | 58 mph | 97 km |
| 1996 | Violet | Category 1 | 75 mph | 209 km |
| 1995 | Oscar | Category 3 | 92 mph | 243 km |
| 1993 | Vernon | Category 1 | 69 mph | 233 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 | 117 km |
| 1861 | OFF MIYAGI | Earthquake | 3.9 m | — | 87 km |
| 2008 | ARATOZAWA, JAPAN | Eruption + Earthquake | 2.5 m | 23 | 89 km |
| 1846 | SANRIKU | Earthquake | 2.0 m | — | 60 km |
| 1960 | SANRIKU | Earthquake | 1.0 m | — | 144 km |
| 1915 | SANRIKU | Earthquake | 1.0 m | — | 141 km |
| 1897 | SANRIKU | Earthquake | 1.0 m | — | 131 km |
| 1968 | SANRIKU | Earthquake | 1.0 m | — | 107 km |
| 1989 | JAPAN | Earthquake | 0.9 m | — | 99 km |
| 1936 | SANRIKU | Earthquake | 0.7 m | — | 123 km |
| 2011 | HONSHU ISLAND | Earthquake | 0.6 m | — | 126 km |
| 1978 | SANRIKU | Earthquake | 0.6 m | 28 | 122 km |
| 1901 | OFF NORTHEAST COAST HONSHU | Earthquake | 0.6 m | — | 146 km |
| 1912 | SANRIKU | Earthquake | 0.5 m | — | 137 km |
| 1928 | SANRIKU | Earthquake | 0.5 m | — | 140 km |
| 1981 | E. HONSHU ISLAND | Earthquake | 0.4 m | — | 104 km |
| 1992 | HONSHU ISLAND | Earthquake | 0.3 m | — | 127 km |
| 1960 | SANRIKU | Earthquake | 0.3 m | — | 126 km |
| 2015 | HONSHU | Earthquake | 0.3 m | — | 108 km |
| 2025 | SANRIKU | Earthquake | 0.2 m | — | 133 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
11 volcanoes within 200 km. Closest: Iwatesan (98 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Iwatesan | Complex | 2,038 m (6,686 ft) | 1919 | 98 km |
| Kurikomayama | Stratovolcano | 1,627 m (5,338 ft) | 1950 | 100 km |
| Akita-Komagatake | Stratovolcano(es) | 1,637 m (5,371 ft) | 1971 | 106 km |
| Hachimantai | Stratovolcano | 1,613 m (5,292 ft) | -5350 | 115 km |
| Naruko | Caldera | 470 m (1,542 ft) | 837 | 115 km |
| Akita-Yakeyama | Stratovolcano | 1,366 m (4,482 ft) | 1997 | 122 km |
| Chokaisan | Stratovolcano(es) | 2,236 m (7,336 ft) | 1974 | 158 km |
| Towada | Caldera | 1,011 m (3,317 ft) | 915 | 161 km |
| Hakkodasan | Stratovolcano(es) | 1,585 m (5,200 ft) | 1550 | 175 km |
| Zaozan [Zaosan] | Complex | 1,841 m (6,040 ft) | 1940 | 177 km |
| Megata | Maar(s) | 291 m (955 ft) | -2050 | 198 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 1.9 in | Driest |
| February | 32°F (0°C) | 2.4 in | Coldest |
| March | 37°F (3°C) | 3.3 in | |
| April | 47°F (8°C) | 4.7 in | |
| May | 55°F (13°C) | 5.2 in | |
| June | 61°F (16°C) | 5.8 in | |
| July | 68°F (20°C) | 6.5 in | |
| August | 72°F (22°C) | 6.5 in | Warmest |
| September | 65°F (18°C) | 8.3 in | Wettest |
| October | 55°F (13°C) | 6.1 in | |
| November | 46°F (8°C) | 3.3 in | |
| December | 37°F (3°C) | 2.2 in |
Kamaishi has a seasonal temperature swing of 40°F / from 32°F in February to 72°F in August. Total annual precipitation is 56.2 inches, with September being the wettest month (8.3") and January the driest (1.9").