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Oyama, Japan

Full City Profile

4.2 /5.0
A Great
18,568 Population 211/sq mi density
1,004 ft Elevation 306 meters
53°F Avg Temperature 11°C
A
Overall
4.2 / 5.0
Strong
B
Economy
3.3 / 5.0
$33,100 median income, 2.2% unemployment
A+
Affordability
5.0 / 5.0
$84,000 home value, $420/mo rent
Oyama experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 34°F in January while summers reach 70°F in July. The area gets 217 sunny days per year. Annual precipitation totals 65.6 inches. The area receives 4.3 inches of snow annually.

Temperature

34°F Jan (1°C) 70°F Jul (21°C)
Annual Average52.5°F
3% below US avg
January Average34°F (1°C)
July Average70°F (21°C)
Sunny Days217 days/yr

Geography

Elevation1,004 ft (306 m)
Area88.1 sq mi (228.3 km²)
Population Density211/sq mi
Coordinates35.3569°N, 138.9976°W
TimezoneAsia/Tokyo

Precipitation & Snow

Annual Rainfall 65.6"
73% above US avg
Snowfall 4.3"
Wettest Month (Aug) 10.04"
Driest Month (Dec) 1.69"

Air Quality

Earthquake History

1,949 earthquakes (M2.5+) within 150 km since 1990. Strongest: M6.4. Most recent: M4.3 on Aug 28, 2025.

Feb 20, 1990 28 km E of Shimoda, Japan M6.4 76 km
Jun 1, 1990 near the east coast of Honshu, Japan M6.3 123 km
Jun 3, 2000 6 km SE of Narut?, Japan M6.2 135 km
Apr 21, 2011 6 km WNW of T?gane, Japan M6.2 121 km
Apr 11, 2011 23 km SE of T?gane, Japan M6.2 143 km
Aug 10, 2009 8 km NE of Sagara, Japan M6.2 96 km
Jul 15, 2000 near the south coast of Honshu, Japan M6.1 118 km
May 26, 2023 12 km SE of Narutō, Japan M6.1 140 km
Jul 1, 2000 53 km SSE of Shimoda, Japan M6.1 127 km
May 4, 2014 31 km ESE of It?, Japan M6.0 63 km
Mar 15, 2011 6 km NNW of Fujinomiya, Japan M6.0 39 km
Jul 23, 2005 9 km WSW of Ichihara, Japan M5.9 91 km
Jan 15, 2007 15 km WSW of Heda, Japan M5.9 61 km
Jul 8, 2000 71 km SSE of Shimoda, Japan M5.9 146 km
Aug 1, 2011 20 km E of ?yama, Japan M5.9 96 km
Oct 6, 1995 68 km S of Shimoda, Japan M5.9 143 km
Apr 10, 2005 near the east coast of Honshu, Japan M5.9 130 km
Apr 29, 2012 5 km NNW of T?gane, Japan M5.8 125 km
Apr 16, 2011 6 km ENE of Tanuma, Japan M5.8 128 km
Feb 1, 1992 4 km SSE of Miura, Japan M5.8 65 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

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

Year Name Category Closest
2025 Nakri Category 1 278 km
2024 Ampil Category 3 238 km
2024 Jebi Category 1 298 km
2019 Faxai Category 4 62 km
2019 Hagibis Category 2 45 km
2018 Jongdari Category 2 144 km
2018 Shanshan Category 1 201 km
2017 Lan Category 1 273 km
2016 Mindulle Category 1 126 km
2014 Phanfone Category 1 74 km
2013 Wipha Category 1 285 km
2011 Roke Category 3 63 km
2009 Melor Category 1 266 km
2009 Krovanh Category 1 222 km
2008 Sinlaku Category 1 282 km
2007 Fitow Category 1 33 km
2005 Saola Category 2 297 km
2005 Mawar Category 2 54 km
2004 Ma-on Category 4 33 km
2003 Choi-wan Category 3 286 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 54 km
1703 OFF SW BOSO PENINSULA Earthquake 11.7 m 5,233 103 km
1495 KAMAKURA, SAGAMI BAY, TOKAIDO Earthquake 5.0 m 200 54 km
1433 OFF IZU-OSHIMA Earthquake 2.0 m 68 km
2009 HONSHU: S COAST Earthquake 0.6 m 1 96 km
1980 HONSHU ISLAND Earthquake 0.6 m 63 km
1978 TOKAIDO Earthquake 0.4 m 25 65 km
1923 RYUKYU ISLANDS Earthquake 0.3 m 121 km
1974 TOKAIDO Earthquake 0.2 m 30 88 km
1990 JAPAN Earthquake 0.2 m 76 km
2000 HONSHU: S COAST Earthquake 0.1 m 118 km
2000 KOZU-SHIMA ISLAND, HONSHU Earthquake 0.1 m 1 127 km
1857 TOKAIDO Earthquake 89 km
1855 TOKAIDO Earthquake 6,757 80 km
1782 ODAWARA, SAGAMI BAY Eruption + Earthquake 70 km
1642 BOSO, JAPAN Earthquake 147 km
1633 SAGAMI BAY Earthquake 150 25 km
1602 BOSO, JAPAN Eruption + Earthquake 139 km
1589 SURUGA, JAPAN Earthquake 95 km
1257 SAGAMI BAY, JAPAN Earthquake 49 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

15 volcanoes within 200 km. Closest: Hakoneyama (14 km).

Name Type Elevation Last Eruption Distance
Hakoneyama Complex 1,438 m (4,718 ft) 2015 14 km
Fujisan Stratovolcano 3,776 m (12,388 ft) 1708 25 km
Izu-Tobu Pyroclastic cone(s) 1,406 m (4,613 ft) 1989 52 km
Izu-Oshima Stratovolcano 758 m (2,487 ft) 1990 79 km
Toshima Stratovolcano 508 m (1,667 ft) -4550 97 km
Yokodake Stratovolcano(es) 2,480 m (8,136 ft) 1200 102 km
Niijima Lava dome(s) 432 m (1,417 ft) 886 110 km
Asamayama Complex 2,568 m (8,425 ft) 2019 124 km
Harunasan Stratovolcano 1,449 m (4,754 ft) 550 125 km
Kozushima Lava dome(s) 572 m (1,877 ft) 838 127 km
Akagisan Stratovolcano 1,828 m (5,997 ft) Unknown 135 km
Kusatsu-Shiranesan Stratovolcano(es) 2,165 m (7,103 ft) 2018 147 km
Miyakejima Stratovolcano 775 m (2,543 ft) 2010 149 km
Ontakesan Complex 3,067 m (10,062 ft) 2014 150 km
Shiga Shield(s) 2,041 m (6,696 ft) Unknown 154 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 34°F (1°C) 1.9 in Coldest
February 34°F (1°C) 2.4 in
March 39°F (4°C) 4.1 in
April 50°F (10°C) 5.0 in
May 58°F (14°C) 5.7 in
June 64°F (18°C) 8.2 in
July 70°F (21°C) 7.0 in
August 72°F (22°C) 10.0 in Warmest, Wettest
September 66°F (19°C) 9.5 in
October 56°F (13°C) 6.7 in
November 48°F (9°C) 3.3 in
December 39°F (4°C) 1.7 in Driest

Oyama has a seasonal temperature swing of 38°F / from 34°F in January to 72°F in August. Total annual precipitation is 65.6 inches, with August being the wettest month (10.0") and December the driest (1.7").

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