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Ōamishirasato, Japan

Full City Profile

4.2 /5.0
A Great
48,129 Population 318/sq mi density
23 ft Elevation 7 meters
59°F Avg Temperature 15°C
A
Overall
4.2 / 5.0
Strong
B
Economy
3.3 / 5.0
$35,400 median income, 2.5% unemployment
A+
Affordability
5.0 / 5.0
$102,000 home value, $510/mo rent
Ōamishirasato enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 40°F in January while summers reach 75°F in July. The area gets 231 sunny days per year. Annual precipitation totals 58.1 inches. The area receives 0.0 inches of snow annually.

Temperature

40°F Jan (5°C) 75°F Jul (24°C)
Annual Average59.0°F
9% above US avg
January Average40°F (5°C)
July Average75°F (24°C)
Sunny Days231 days/yr

Geography

Elevation23 ft (7 m)
Area151.4 sq mi (392.2 km²)
Population Density318/sq mi
Coordinates35.5118°N, 140.3526°W
TimezoneAsia/Tokyo

Precipitation & Snow

Annual Rainfall 58.1"
53% above US avg
Snowfall 0.0"
Wettest Month (Sep) 7.87"
Driest Month (Jan) 2.24"

Air Quality

Earthquake History

3,104 earthquakes (M2.5+) within 150 km since 1990. Strongest: M7.9. Most recent: M4.2 on Aug 29, 2025.

Mar 11, 2011 47 km E of ?arai, Japan M7.9 110 km
May 7, 2008 78 km NE of Hasaki, Japan M6.9 128 km
Mar 11, 2011 81 km NE of Hasaki, Japan M6.5 131 km
Feb 20, 1990 28 km E of Shimoda, Japan M6.4 134 km
Jun 1, 1990 near the east coast of Honshu, Japan M6.3 2 km
Mar 11, 2011 92 km ENE of Hasaki, Japan M6.3 142 km
Jun 3, 2000 6 km SE of Narut?, Japan M6.2 11 km
Apr 11, 2011 23 km SE of T?gane, Japan M6.2 23 km
Sep 11, 1996 23 km SSE of Hasaki, Japan M6.2 54 km
May 7, 2008 80 km NE of Hasaki, Japan M6.2 131 km
Apr 21, 2011 6 km WNW of T?gane, Japan M6.2 9 km
Nov 20, 1996 115 km SE of Katsuura, Japan M6.1 147 km
May 26, 2023 12 km SE of Narutō, Japan M6.1 16 km
Aug 5, 1990 43 km E of ?arai, Japan M6.1 110 km
Jun 5, 2012 75 km ESE of ?hara, Japan M6.1 95 km
Sep 15, 2011 68 km E of ?arai, Japan M6.1 121 km
Mar 13, 2011 72 km E of Hasaki, Japan M6.1 119 km
May 7, 2008 95 km ENE of Hasaki, Japan M6.1 145 km
Aug 6, 1991 19 km E of Hasaki, Japan M6.0 67 km
Mar 11, 2011 4 km ESE of Hasaki, Japan M6.0 52 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

43 hurricanes (Cat 1+) within 500 km since 1980. Strongest: Category 4. Most recent: Halong (2025).

Year Name Category Closest
2025 Halong Category 3 288 km
2025 Nakri Category 1 247 km
2024 Ampil Category 3 154 km
2024 Jebi Category 1 186 km
2021 Mindulle Category 1 257 km
2019 Faxai Category 4 32 km
2019 Hagibis Category 2 87 km
2018 Jongdari Category 2 189 km
2018 Shanshan Category 1 104 km
2016 Mindulle Category 1 156 km
2016 Lionrock Category 1 208 km
2014 Phanfone Category 1 190 km
2011 Roke Category 1 113 km
2009 Krovanh Category 1 228 km
2007 Fitow Category 1 105 km
2005 Saola Category 2 214 km
2005 Mawar Category 2 22 km
2004 Ma-on Category 4 51 km
2003 Choi-wan Category 3 232 km
2002 Higos Category 2 59 km
Source: NOAA IBTrACS (Cat 1+, 1980–2026)

Tsunami History

20 tsunamis recorded within 500 km. Highest wave on record: 13.0 m (43 ft).

Year Location Cause Max Wave Deaths Distance
1923 SAGAMI BAY Earthquake 13.0 m 105,385 90 km
1703 OFF SW BOSO PENINSULA Earthquake 11.7 m 5,233 103 km
1677 OFF SE. BOSO PENINSULA Earthquake 8.0 m 500 119 km
1495 KAMAKURA, SAGAMI BAY, TOKAIDO Earthquake 5.0 m 200 90 km
1732 KUJUKURI BEACH, JAPAN Earthquake 2.0 m 53 km
1670 BOSO, JAPAN Earthquake 2.0 m 59 km
1433 OFF IZU-OSHIMA Earthquake 2.0 m 103 km
1980 HONSHU ISLAND Earthquake 0.6 m 132 km
1982 IBARAKI, JAPAN Earthquake 0.4 m 143 km
1961 KASHIMA, JAPAN Earthquake 0.4 m 150 km
1923 KASHIMA, JAPAN Earthquake 0.4 m 132 km
1978 TOKAIDO Earthquake 0.4 m 25 127 km
1923 RYUKYU ISLANDS Earthquake 0.3 m 69 km
1896 KASHIMA, JAPAN Earthquake 0.3 m 124 km
1990 JAPAN Earthquake 0.2 m 134 km
1855 TOKAIDO Earthquake 6,757 52 km
1782 ODAWARA, SAGAMI BAY Eruption + Earthquake 75 km
1642 BOSO, JAPAN Earthquake 41 km
1633 SAGAMI BAY Earthquake 150 110 km
1602 BOSO, JAPAN Eruption + Earthquake 48 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

15 volcanoes within 200 km. Closest: Izu-Oshima (124 km).

Name Type Elevation Last Eruption Distance
Izu-Oshima Stratovolcano 758 m (2,487 ft) 1990 124 km
Hakoneyama Complex 1,438 m (4,718 ft) 2015 125 km
Izu-Tobu Pyroclastic cone(s) 1,406 m (4,613 ft) 1989 133 km
Toshima Stratovolcano 508 m (1,667 ft) -4550 147 km
Fujisan Stratovolcano 3,776 m (12,388 ft) 1708 148 km
Akagisan Stratovolcano 1,828 m (5,997 ft) Unknown 156 km
Niijima Lava dome(s) 432 m (1,417 ft) 886 158 km
Nantaisan Stratovolcano 2,486 m (8,156 ft) -9540 159 km
Omanago Group Lava dome(s) 2,341 m (7,680 ft) -3050 162 km
Takaharayama Stratovolcano 1,795 m (5,889 ft) -4570 163 km
Nikko-Shiranesan Shield 2,578 m (8,458 ft) 1952 168 km
Harunasan Stratovolcano 1,449 m (4,754 ft) 550 173 km
Miyakejima Stratovolcano 775 m (2,543 ft) 2010 175 km
Kozushima Lava dome(s) 572 m (1,877 ft) 838 181 km
Nasudake Stratovolcano(es) 1,915 m (6,283 ft) 1963 183 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 40°F (5°C) 2.2 in Coldest, Driest
February 42°F (5°C) 3.1 in
March 47°F (8°C) 4.6 in
April 57°F (14°C) 4.8 in
May 64°F (18°C) 4.9 in
June 69°F (21°C) 6.6 in
July 75°F (24°C) 4.8 in
August 79°F (26°C) 5.1 in Warmest
September 73°F (23°C) 7.9 in Wettest
October 64°F (18°C) 7.6 in
November 54°F (12°C) 4.2 in
December 45°F (7°C) 2.2 in

Ōamishirasato has a seasonal temperature swing of 38°F / from 40°F in January to 79°F in August. Total annual precipitation is 58.1 inches, with September being the wettest month (7.9") and January the driest (2.2").

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