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Weather & Climate in Ishii, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ishii enjoys a temperate climate with an average annual temperature of 60°F (15°C). Winters average 40°F in January while summers reach 79°F in July. The area gets 216 sunny days per year. Annual precipitation totals 65.9 inches (wetter than the 38-inch national average). The city sits at an elevation of 33 feet.
Temperature
40°F Jan (5°C)
79°F Jul (26°C)
| Annual Average | 59.8°F |
| 11% above US avg | |
| January Average | 40°F (5°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 216 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 11.1 sq mi (28.8 km²) |
| Population Density | 2,252/sq mi |
| Coordinates | 34.0675°N, 134.4421°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
197 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.9.
| Jan 16, 1995 | 8 km S of Akashi, Japan | M6.9 | 78 km | 22 km |
| Apr 12, 2013 | 6 km WNW of Sumoto, Japan | M5.8 | 49 km | 14 km |
| Aug 20, 1999 | 22 km SE of Kainan, Japan | M5.7 | 89 km | 66 km |
| Jun 17, 2018 | near the south coast of western Honshu, Japan | M5.5 | 138 km | 10 km |
| Mar 13, 2019 | 22 km ESE of Anan, Japan | M5.2 | 48 km | 37 km |
| Apr 26, 2007 | 15 km ESE of Niihama, Japan | M5.1 | 93 km | 50 km |
| Apr 14, 2000 | 10 km SSW of Tanabe, Japan | M5.1 | 92 km | 35 km |
| Oct 20, 1991 | 45 km SSW of Tanabe, Japan | M5.1 | 110 km | 41 km |
| Jan 16, 1995 | 20 km SW of Akashi, Japan | M5.0 | 64 km | 10 km |
| Jul 5, 2011 | 12 km NNW of Gob?, Japan | M5.0 | 65 km | 16 km |
| Dec 22, 1994 | 6 km NNW of Takatsuki, Japan | M4.9 | 141 km | 370 km |
| Aug 22, 1994 | 39 km S of Anan, Japan | M4.9 | 58 km | 38 km |
| Sep 28, 1990 | 24 km NNW of Kariya, Japan | M4.9 | 99 km | 26 km |
| Feb 21, 2011 | 12 km NNW of Tanabe, Japan | M4.9 | 85 km | 55 km |
| Jun 16, 2022 | 5 km S of Komatsushimach?, Japan | M4.9 | 18 km | 40 km |
| Oct 13, 1995 | 10 km ESE of Akashi, Japan | M4.9 | 86 km | 18 km |
| Jul 20, 2010 | 8 km WSW of Hashimoto, Japan | M4.9 | 103 km | 66 km |
| Jan 8, 2012 | 29 km SSW of K?ya, Japan | M4.8 | 96 km | 55 km |
| May 26, 2005 | 6 km SSW of Kan’onjich?, Japan | M4.8 | 75 km | 38 km |
| Aug 9, 2011 | 19 km SSW of K?ya, Japan | M4.8 | 100 km | 63 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
54 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2023 | Lan | Category 2 | 81 mph | 123 km |
| 2018 | Jebi | Category 3 | 98 mph | 33 km |
| 2018 | Trami | Category 1 | 98 mph | 97 km |
| 2018 | Cimaron | Category 1 | 92 mph | 43 km |
| 2018 | Jongdari | Category 1 | 75 mph | 249 km |
| 2017 | Lan | Category 2 | 104 mph | 266 km |
| 2017 | Noru | Category 1 | 69 mph | 52 km |
| 2016 | Malakas | Category 1 | 86 mph | 166 km |
| 2015 | Nangka | Category 1 | 86 mph | 119 km |
| 2014 | Phanfone | Category 2 | 92 mph | 148 km |
| 2014 | Halong | Category 1 | 81 mph | 159 km |
| 2012 | Jelawat | Category 1 | 92 mph | 169 km |
| 2011 | Roke | Category 4 | 98 mph | 187 km |
| 2011 | Ma-on | Category 1 | 86 mph | 54 km |
| 2009 | Melor | Category 1 | 92 mph | 186 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 147 km |
| 2007 | Usagi | Category 2 | 92 mph | 280 km |
| 2007 | Man-yi | Category 1 | 81 mph | 215 km |
| 2005 | Mawar | Category 2 | 92 mph | 290 km |
| 2004 | Ma-on | Category 4 | 98 mph | 273 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
13 tsunamis recorded within 500 km. Highest wave on record: 28.0 m (92 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1854 | NANKAIDO | Earthquake | 28.0 m | 3,000 | 119 km |
| 1707 | NANKAIDO | Earthquake | 25.7 m | 5,000 | 102 km |
| 1605 | NANKAIDO | Earthquake | 10.0 m | 5,000 | 126 km |
| 1711 | SEIONAIKAI, JAPAN | Earthquake | 2.0 m | 1,000 | 48 km |
| 1510 | OSAKA BAY | Earthquake | 2.0 m | - | 106 km |
| 1808 | E. AWA, TOKUSHIMA PREFECTURE | Earthquake | 1.5 m | - | 38 km |
| 1995 | KOBE, JAPAN | Earthquake | 0.3 m | 6,434 | 82 km |
| 1791 | OASAKA BAY | Earthquake | - | - | 100 km |
| 1498 | NANKAIDO | Earthquake | - | - | 94 km |
| 1361 | NANKAIDO | Earthquake | - | 660 | 130 km |
| 1331 | OFF TANABE, WAKAYAMA PREFECTURE | Earthquake | - | - | 81 km |
| 887 | NANKAIDO | Earthquake | - | - | 143 km |
| 745 | OSAKA BAY, JAPAN | Earthquake | - | - | 99 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 1.9 in | Coldest |
| February | 41°F (5°C) | 2.4 in | |
| March | 47°F (8°C) | 3.7 in | |
| April | 57°F (14°C) | 6.0 in | |
| May | 65°F (18°C) | 6.3 in | |
| June | 72°F (22°C) | 9.9 in | |
| July | 79°F (26°C) | 7.4 in | |
| August | 81°F (27°C) | 6.5 in | Warmest |
| September | 74°F (23°C) | 11.1 in | Wettest |
| October | 64°F (18°C) | 5.6 in | |
| November | 54°F (12°C) | 3.7 in | |
| December | 45°F (7°C) | 1.6 in | Driest |
Ishii has a seasonal temperature swing of 40°F / from 40°F in January to 81°F in August. Total annual precipitation is 65.9 inches, with September being the wettest month (11.1") and December the driest (1.6").