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Weather & Climate in Yachimata, Japan

Temperature, precipitation, air quality, natural hazards, and monthly weather data.

Yachimata enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 41°F in January while summers reach 76°F in July. The area gets 234 sunny days per year, above the national average. Annual precipitation totals 56.3 inches (wetter than the 38-inch national average). The city sits at an elevation of 154 feet.

Temperature

41°F Jan (5°C) 76°F Jul (24°C)
Annual Average59.1°F
9% above US avg
January Average41°F (5°C)
July Average76°F (24°C)
Sunny Days234 days/yr

Geography

Elevation154 ft (47 m)
Area28.9 sq mi (74.9 km²)
Population Density2,377/sq mi
Coordinates35.6500°N, 140.3167°W
TimezoneAsia/Tokyo

Precipitation & Snow

Annual Rainfall 56.3"
48% above US avg
Snowfall 0.0"
Wettest Month (Sep) 7.64"
Driest Month (Dec) 2.09"

Air Quality

Earthquake History

3,286 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.9.

Mar 11, 2011 47 km E of ?arai, Japan M7.9 100 km 43 km
May 7, 2008 78 km NE of Hasaki, Japan M6.9 123 km 27 km
Mar 11, 2011 81 km NE of Hasaki, Japan M6.5 126 km 7 km
Feb 20, 1990 28 km E of Shimoda, Japan M6.4 143 km 14 km
Mar 11, 2011 92 km ENE of Hasaki, Japan M6.3 140 km 21 km
Jun 1, 1990 near the east coast of Honshu, Japan M6.3 14 km 67 km
Jun 3, 2000 6 km SE of Narut?, Japan M6.2 17 km 62 km
Apr 21, 2011 6 km WNW of T?gane, Japan M6.2 8 km 43 km
Sep 11, 1996 23 km SSE of Hasaki, Japan M6.2 58 km 55 km
Mar 11, 2011 70 km ESE of Kitaibaraki, Japan M6.2 147 km 40 km
Apr 11, 2011 23 km SE of T?gane, Japan M6.2 35 km 15 km
May 7, 2008 80 km NE of Hasaki, Japan M6.2 125 km 19 km
May 26, 2023 12 km SE of Narutō, Japan M6.1 23 km 42 km
Sep 15, 2011 68 km E of ?arai, Japan M6.1 114 km 28 km
Jun 5, 2012 75 km ESE of ?hara, Japan M6.1 108 km 15 km
May 7, 2008 95 km ENE of Hasaki, Japan M6.1 141 km 23 km
Mar 13, 2011 72 km E of Hasaki, Japan M6.1 120 km 8 km
Aug 5, 1990 43 km E of ?arai, Japan M6.1 100 km 27 km
Apr 3, 2004 37 km ESE of Hitachi, Japan M6.0 107 km 31 km
Aug 6, 1991 19 km E of Hasaki, Japan M6.0 66 km 29 km
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.

Hurricane History

41 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.

Year Name Category Max Wind Closest
2025 Nakri Category 1 — 263 km
2024 Ampil Category 3 98 mph 167 km
2024 Jebi Category 1 75 mph 195 km
2021 Mindulle Category 1 86 mph 266 km
2019 Faxai Category 4 98 mph 17 km
2019 Hagibis Category 2 92 mph 83 km
2018 Jongdari Category 2 86 mph 202 km
2018 Shanshan Category 1 81 mph 118 km
2016 Mindulle Category 1 75 mph 168 km
2016 Lionrock Category 1 81 mph 208 km
2014 Phanfone Category 1 75 mph 193 km
2011 Roke Category 1 92 mph 105 km
2009 Krovanh Category 1 69 mph 242 km
2007 Fitow Category 1 81 mph 101 km
2005 Saola Category 2 86 mph 228 km
2005 Mawar Category 2 86 mph 6 km
2004 Ma-on Category 4 92 mph 47 km
2003 Choi-wan Category 3 81 mph 246 km
2002 Higos Category 2 86 mph 47 km
2002 Phanfone Category 1 75 mph 269 km
Source: NOAA IBTrACS (Category 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 96 km
1703 OFF SW BOSO PENINSULA Earthquake 11.7 m 5,233 116 km
1677 OFF SE. BOSO PENINSULA Earthquake 8.0 m 500 129 km
1495 KAMAKURA, SAGAMI BAY, TOKAIDO Earthquake 5.0 m 200 96 km
1732 KUJUKURI BEACH, JAPAN Earthquake 2.0 m — 67 km
1670 BOSO, JAPAN Earthquake 2.0 m — 64 km
1433 OFF IZU-OSHIMA Earthquake 2.0 m — 112 km
1980 HONSHU ISLAND Earthquake 0.6 m — 139 km
1982 IBARAKI, JAPAN Earthquake 0.4 m — 139 km
1961 KASHIMA, JAPAN Earthquake 0.4 m — 148 km
1923 KASHIMA, JAPAN Earthquake 0.4 m — 137 km
1978 TOKAIDO Earthquake 0.4 m 25 134 km
1923 RYUKYU ISLANDS Earthquake 0.3 m — 84 km
1896 KASHIMA, JAPAN Earthquake 0.3 m — 113 km
1935 JAPAN Earthquake 0.2 m — 144 km
1990 JAPAN Earthquake 0.2 m — 143 km
1855 TOKAIDO Earthquake — 6,757 47 km
1782 ODAWARA, SAGAMI BAY Eruption + Earthquake — — 83 km
1642 BOSO, JAPAN Earthquake — — 56 km
1633 SAGAMI BAY Earthquake — 150 113 km
Source: NOAA/NCEI Historical Tsunami Database.

Nearby Volcanoes

15 volcanoes within 200 km. Closest: Hakoneyama (126 km).

Name Type Elevation Last Eruption Distance
Hakoneyama Complex 1,438 m (4,718 ft) 2015 126 km
Izu-Oshima Stratovolcano 758 m (2,487 ft) 1990 133 km
Izu-Tobu Pyroclastic cone(s) 1,406 m (4,613 ft) 1989 139 km
Akagisan Stratovolcano 1,828 m (5,997 ft) Unknown 143 km
Nantaisan Stratovolcano 2,486 m (8,156 ft) -9540 144 km
Omanago Group Lava dome(s) 2,341 m (7,680 ft) -3050 147 km
Takaharayama Stratovolcano 1,795 m (5,889 ft) -4570 147 km
Fujisan Stratovolcano 3,776 m (12,388 ft) 1708 147 km
Nikko-Shiranesan Shield 2,578 m (8,458 ft) 1952 153 km
Toshima Stratovolcano 508 m (1,667 ft) -4550 157 km
Harunasan Stratovolcano 1,449 m (4,754 ft) 550 161 km
Nasudake Stratovolcano(es) 1,915 m (6,283 ft) 1963 167 km
Niijima Lava dome(s) 432 m (1,417 ft) 886 169 km
Hiuchigatake Stratovolcano 2,356 m (7,730 ft) 1544 172 km
Asamayama Complex 2,568 m (8,425 ft) 2019 182 km
Source: Smithsonian Institution Global Volcanism Program (GVP).

Monthly Weather

Month Avg Temperature Precipitation Summary
January 41°F (5°C) 2.1 in Coldest
February 42°F (5°C) 2.9 in
March 47°F (8°C) 4.4 in
April 56°F (14°C) 4.8 in
May 64°F (18°C) 4.7 in
June 70°F (21°C) 6.5 in
July 76°F (24°C) 4.7 in
August 79°F (26°C) 5.1 in Warmest
September 73°F (23°C) 7.6 in Wettest
October 63°F (17°C) 7.3 in
November 54°F (12°C) 4.0 in
December 45°F (7°C) 2.1 in Driest

Yachimata has a seasonal temperature swing of 39°F / from 41°F in January to 79°F in August. Total annual precipitation is 56.4 inches, with September being the wettest month (7.6") and December the driest (2.1").

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