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Yōkaichiba, Japan

Full City Profile

4.2 /5.0
A Great
32,651 Population 1,047/sq mi density
33 ft Elevation 10 meters
58°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
Yōkaichiba enjoys a temperate climate with an average annual temperature of 58°F (14°C). Winters average 39°F in January while summers reach 75°F in July. The area gets 232 sunny days per year. Annual precipitation totals 57.3 inches. The area receives 0.0 inches of snow annually.

Temperature

39°F Jan (4°C) 75°F Jul (24°C)
Annual Average58.4°F
8% above US avg
January Average39°F (4°C)
July Average75°F (24°C)
Sunny Days232 days/yr

Geography

Elevation33 ft (10 m)
Area31.2 sq mi (80.8 km²)
Population Density1,047/sq mi
Coordinates35.7000°N, 140.5500°W
TimezoneAsia/Tokyo

Precipitation & Snow

Annual Rainfall 57.3"
51% above US avg
Snowfall 0.0"
Wettest Month (Sep) 7.95"
Driest Month (Jan) 2.17"

Air Quality

Earthquake History

3,700 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 82 km
May 7, 2008 78 km NE of Hasaki, Japan M6.9 102 km
Apr 11, 2011 17 km SSW of Ishikawa, Japan M6.6 145 km
Mar 11, 2011 115 km ENE of Hasaki, Japan M6.5 141 km
Mar 11, 2011 81 km NE of Hasaki, Japan M6.5 105 km
Mar 11, 2011 108 km ESE of Kitaibaraki, Japan M6.4 144 km
Jun 1, 1990 near the east coast of Honshu, Japan M6.3 28 km
Jul 30, 2011 13 km SSE of Iwaki, Japan M6.3 143 km
Mar 11, 2011 92 km ENE of Hasaki, Japan M6.3 118 km
Jun 3, 2000 6 km SE of Narut?, Japan M6.2 18 km
Apr 11, 2011 23 km SE of T?gane, Japan M6.2 32 km
Sep 11, 1996 23 km SSE of Hasaki, Japan M6.2 40 km
Mar 11, 2011 70 km ESE of Kitaibaraki, Japan M6.2 128 km
May 7, 2008 80 km NE of Hasaki, Japan M6.2 104 km
Apr 21, 2011 6 km WNW of T?gane, Japan M6.2 26 km
May 26, 2023 12 km SE of Narutō, Japan M6.1 19 km
Sep 15, 2011 68 km E of ?arai, Japan M6.1 94 km
Jun 5, 2012 75 km ESE of ?hara, Japan M6.1 99 km
Aug 5, 1990 43 km E of ?arai, Japan M6.1 83 km
May 7, 2008 95 km ENE of Hasaki, Japan M6.1 120 km
Source: USGS (M2.5+, 1990–2025)

Hurricane History

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

Year Name Category Closest
2025 Nakri Category 1 260 km
2024 Ampil Category 3 153 km
2024 Jebi Category 1 180 km
2021 Mindulle Category 1 249 km
2019 Faxai Category 4 25 km
2019 Hagibis Category 2 105 km
2018 Jongdari Category 2 211 km
2018 Shanshan Category 1 112 km
2016 Mindulle Category 1 183 km
2016 Lionrock Category 1 186 km
2014 Phanfone Category 1 214 km
2011 Roke Category 1 124 km
2009 Krovanh Category 1 252 km
2007 Fitow Category 1 123 km
2005 Saola Category 2 221 km
2005 Mawar Category 2 23 km
2004 Ma-on Category 3 69 km
2003 Choi-wan Category 3 240 km
2002 Higos Category 2 63 km
2002 Phanfone Category 1 270 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 105,385 116 km
1703 OFF SW BOSO PENINSULA Earthquake 11.7 m 5,233 130 km
1677 OFF SE. BOSO PENINSULA Earthquake 8.0 m 500 116 km
1495 KAMAKURA, SAGAMI BAY, TOKAIDO Earthquake 5.0 m 200 116 km
1732 KUJUKURI BEACH, JAPAN Earthquake 2.0 m 60 km
1670 BOSO, JAPAN Earthquake 2.0 m 46 km
1433 OFF IZU-OSHIMA Earthquake 2.0 m 130 km
1938 JAPAN TRENCH Earthquake 0.8 m 135 km
1982 IBARAKI, JAPAN Earthquake 0.4 m 117 km
1961 KASHIMA, JAPAN Earthquake 0.4 m 126 km
1961 KASHIMA, JAPAN Earthquake 0.4 m 134 km
1923 KASHIMA, JAPAN Earthquake 0.4 m 118 km
1923 RYUKYU ISLANDS Earthquake 0.3 m 95 km
1896 KASHIMA, JAPAN Earthquake 0.3 m 98 km
1935 JAPAN Earthquake 0.2 m 126 km
1855 TOKAIDO Earthquake 6,757 68 km
1782 ODAWARA, SAGAMI BAY Eruption + Earthquake 102 km
1642 BOSO, JAPAN Earthquake 56 km
1633 SAGAMI BAY Earthquake 150 134 km
1602 BOSO, JAPAN Eruption + Earthquake 67 km
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.

Nearby Volcanoes

15 volcanoes within 200 km. Closest: Hakoneyama (148 km).

Name Type Elevation Last Eruption Distance
Hakoneyama Complex 1,438 m (4,718 ft) 2015 148 km
Takaharayama Stratovolcano 1,795 m (5,889 ft) -4570 150 km
Izu-Oshima Stratovolcano 758 m (2,487 ft) 1990 151 km
Nantaisan Stratovolcano 2,486 m (8,156 ft) -9540 152 km
Omanago Group Lava dome(s) 2,341 m (7,680 ft) -3050 154 km
Akagisan Stratovolcano 1,828 m (5,997 ft) Unknown 155 km
Izu-Tobu Pyroclastic cone(s) 1,406 m (4,613 ft) 1989 159 km
Nikko-Shiranesan Shield 2,578 m (8,458 ft) 1952 161 km
Nasudake Stratovolcano(es) 1,915 m (6,283 ft) 1963 167 km
Fujisan Stratovolcano 3,776 m (12,388 ft) 1708 169 km
Toshima Stratovolcano 508 m (1,667 ft) -4550 175 km
Harunasan Stratovolcano 1,449 m (4,754 ft) 550 175 km
Hiuchigatake Stratovolcano 2,356 m (7,730 ft) 1544 180 km
Niijima Lava dome(s) 432 m (1,417 ft) 886 186 km
Asamayama Complex 2,568 m (8,425 ft) 2019 198 km
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.

Monthly Weather

Month Avg Temperature Precipitation Summary
January 39°F (4°C) 2.2 in Coldest, Driest
February 41°F (5°C) 3.0 in
March 46°F (8°C) 4.5 in
April 56°F (13°C) 4.7 in
May 63°F (17°C) 4.8 in
June 69°F (20°C) 6.5 in
July 75°F (24°C) 5.0 in
August 78°F (26°C) 5.0 in Warmest
September 73°F (23°C) 8.0 in Wettest
October 63°F (17°C) 7.4 in
November 54°F (12°C) 4.1 in
December 44°F (7°C) 2.2 in

Yōkaichiba has a seasonal temperature swing of 39°F / from 39°F in January to 78°F in August. Total annual precipitation is 57.3 inches, with September being the wettest month (8.0") and January the driest (2.2").

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