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Weather & Climate in Itogawa, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Itogawa enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 40°F in January while summers reach 77°F in July. The area gets 218 sunny days per year. Annual precipitation totals 65.2 inches (wetter than the 38-inch national average). The city sits at an elevation of 423 feet.
Temperature
40°F Jan (4°C)
77°F Jul (25°C)
| Annual Average | 58.8°F |
| 9% above US avg | |
| January Average | 40°F (4°C) |
| July Average | 77°F (25°C) |
| Sunny Days | 218 days/yr |
Geography
| Elevation | 423 ft (129 m) |
| Area | 143.8 sq mi (372.5 km²) |
| Population Density | 176/sq mi |
| Coordinates | 34.0262°N, 135.2528°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
333 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 | 66 km | 22 km |
| Apr 1, 2016 | 54 km SE of Shing?, Japan | M5.9 | 127 km | 14 km |
| Feb 26, 2025 | 38 km ESE of Shingū, Japan | M5.8 | 113 km | 388 km |
| Jun 1, 1998 | 17 km SW of Owase, Japan | M5.8 | 78 km | 399 km |
| Apr 12, 2013 | 6 km WNW of Sumoto, Japan | M5.8 | 55 km | 14 km |
| Aug 20, 1999 | 22 km SE of Kainan, Japan | M5.7 | 14 km | 66 km |
| Aug 1, 2007 | 42 km ESE of Owase, Japan | M5.5 | 126 km | 371 km |
| Oct 30, 2000 | western Honshu, Japan | M5.5 | 94 km | 35 km |
| Jun 17, 2018 | near the south coast of western Honshu, Japan | M5.5 | 96 km | 10 km |
| Sep 24, 2003 | 5 km WNW of Ayabe, Japan | M5.4 | 144 km | 372 km |
| Jan 6, 2004 | 36 km S of Ise, Japan | M5.3 | 131 km | 33 km |
| Mar 13, 2019 | 22 km ESE of Anan, Japan | M5.2 | 44 km | 37 km |
| Apr 14, 2000 | 10 km SSW of Tanabe, Japan | M5.1 | 42 km | 35 km |
| Sep 5, 2004 | 63 km SE of Shing?, Japan | M5.1 | 135 km | 10 km |
| Apr 15, 2007 | 11 km ENE of Ueno-ebisumachi, Japan | M5.1 | 125 km | 16 km |
| Jun 10, 2009 | 7 km WSW of Ise, Japan | M5.1 | 135 km | 352 km |
| Oct 20, 1991 | 45 km SSW of Tanabe, Japan | M5.1 | 77 km | 41 km |
| Mar 16, 1999 | 10 km WNW of Kitahama, Japan | M5.1 | 142 km | 33 km |
| Jul 5, 2011 | 12 km NNW of Gob?, Japan | M5.0 | 12 km | 16 km |
| Jun 20, 2023 | 8 km E of Shingū, Japan | M5.0 | 83 km | 410 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
53 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Nakri | Category 1 | - | 284 km |
| 2023 | Lan | Category 2 | 81 mph | 55 km |
| 2019 | Hagibis | Category 3 | 98 mph | 265 km |
| 2018 | Jebi | Category 3 | 98 mph | 45 km |
| 2018 | Trami | Category 1 | 92 mph | 34 km |
| 2018 | Cimaron | Category 1 | 92 mph | 70 km |
| 2018 | Jongdari | Category 1 | 81 mph | 178 km |
| 2017 | Lan | Category 2 | 104 mph | 193 km |
| 2017 | Noru | Category 1 | 69 mph | 14 km |
| 2016 | Malakas | Category 1 | 86 mph | 212 km |
| 2015 | Nangka | Category 1 | 86 mph | 144 km |
| 2014 | Phanfone | Category 2 | 92 mph | 115 km |
| 2014 | Halong | Category 1 | 81 mph | 214 km |
| 2012 | Jelawat | Category 1 | 92 mph | 162 km |
| 2011 | Roke | Category 4 | 98 mph | 134 km |
| 2011 | Ma-on | Category 1 | 86 mph | 77 km |
| 2009 | Melor | Category 1 | 92 mph | 124 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 115 km |
| 2007 | Man-yi | Category 1 | 81 mph | 271 km |
| 2005 | Mawar | Category 2 | 92 mph | 221 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
20 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 | 106 km |
| 1707 | NANKAIDO | Earthquake | 25.7 m | 5,000 | 101 km |
| 1605 | NANKAIDO | Earthquake | 10.0 m | 5,000 | 119 km |
| 1946 | HONSHU: S COAST | Earthquake | 6.6 m | 1,362 | 117 km |
| 1711 | SEIONAIKAI, JAPAN | Earthquake | 2.0 m | 1,000 | 119 km |
| 1520 | KII, KUMANANONADA | Earthquake | 2.0 m | - | 108 km |
| 1510 | OSAKA BAY | Earthquake | 2.0 m | - | 65 km |
| 1403 | KUMANONADA | Earthquake | 2.0 m | - | 121 km |
| 922 | KUMANONADA | Earthquake | 2.0 m | - | 136 km |
| 1808 | E. AWA, TOKUSHIMA PREFECTURE | Earthquake | 1.5 m | - | 44 km |
| 1948 | TOKAIDO | Earthquake | 0.6 m | - | 108 km |
| 1995 | KOBE, JAPAN | Earthquake | 0.3 m | 6,434 | 65 km |
| 1791 | OASAKA BAY | Earthquake | - | - | 54 km |
| 1498 | NANKAIDO | Earthquake | - | - | 59 km |
| 1361 | NANKAIDO | Earthquake | - | 660 | 117 km |
| 1360 | KUMANONADA | Earthquake | - | - | 112 km |
| 1331 | OFF TANABE, WAKAYAMA PREFECTURE | Earthquake | - | - | 37 km |
| 1099 | NANKAIDO | Earthquake | - | - | 116 km |
| 887 | NANKAIDO | Earthquake | - | - | 114 km |
| 745 | OSAKA BAY, JAPAN | Earthquake | - | - | 64 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 2.2 in | Coldest |
| February | 40°F (5°C) | 2.6 in | |
| March | 46°F (8°C) | 4.3 in | |
| April | 56°F (13°C) | 6.2 in | |
| May | 64°F (18°C) | 6.6 in | |
| June | 70°F (21°C) | 10.0 in | Wettest |
| July | 77°F (25°C) | 7.1 in | |
| August | 79°F (26°C) | 5.8 in | Warmest |
| September | 73°F (23°C) | 9.4 in | |
| October | 63°F (17°C) | 5.5 in | |
| November | 54°F (12°C) | 3.7 in | |
| December | 44°F (7°C) | 1.9 in | Driest |
Itogawa has a seasonal temperature swing of 39°F / from 40°F in January to 79°F in August. Total annual precipitation is 65.2 inches, with June being the wettest month (10.0") and December the driest (1.9").