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Weather & Climate in Izumisano, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Izumisano enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 41°F in January while summers reach 81°F in July. The area gets 285 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 65.7 inches (wetter than the 38-inch national average). The area receives 4.5 inches of snow annually. The city sits at an elevation of 20 feet.
Temperature
41°F Jan (5°C)
81°F Jul (27°C)
| Annual Average | 61.2°F |
| 13% above US avg | |
| January Average | 41°F (5°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 285 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 147.0 sq mi (380.6 km²) |
| Population Density | 681/sq mi |
| Coordinates | 34.4167°N, 135.3167°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
358 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 | 33 km | 22 km |
| Apr 11, 1990 | 11 km ENE of Maizuru, Japan | M6.1 | 118 km | 362 km |
| Feb 26, 2025 | 38 km ESE of Shingū, Japan | M5.8 | 132 km | 388 km |
| Apr 12, 2013 | 6 km WNW of Sumoto, Japan | M5.8 | 45 km | 14 km |
| Jun 1, 1998 | 17 km SW of Owase, Japan | M5.8 | 88 km | 399 km |
| Aug 7, 1992 | 21 km N of Miyazu, Japan | M5.8 | 147 km | 358 km |
| Aug 20, 1999 | 22 km SE of Kainan, Japan | M5.7 | 44 km | 66 km |
| Apr 21, 2000 | 27 km NNE of Maizuru, Japan | M5.5 | 140 km | 347 km |
| Aug 1, 2007 | 42 km ESE of Owase, Japan | M5.5 | 132 km | 371 km |
| Oct 30, 2000 | western Honshu, Japan | M5.5 | 83 km | 35 km |
| Jun 17, 2018 | near the south coast of western Honshu, Japan | M5.5 | 54 km | 10 km |
| Sep 24, 2003 | 5 km WNW of Ayabe, Japan | M5.4 | 101 km | 372 km |
| Jan 11, 2001 | 15 km E of Tottori, Japan | M5.3 | 144 km | 33 km |
| Jan 6, 2004 | 36 km S of Ise, Japan | M5.3 | 128 km | 33 km |
| May 9, 2022 | 7 km NE of Toba, Japan | M5.3 | 145 km | 329 km |
| Apr 22, 1998 | 18 km SE of Hikone, Japan | M5.2 | 130 km | 33 km |
| Mar 13, 2019 | 22 km ESE of Anan, Japan | M5.2 | 80 km | 37 km |
| May 28, 1994 | 12 km WNW of Nagahama, Japan | M5.1 | 133 km | 49 km |
| Apr 14, 2000 | 10 km SSW of Tanabe, Japan | M5.1 | 85 km | 35 km |
| Oct 20, 1991 | 45 km SSW of Tanabe, Japan | M5.1 | 120 km | 41 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
51 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 | 87 km |
| 2019 | Hagibis | Category 2 | 92 mph | 277 km |
| 2018 | Jebi | Category 3 | 98 mph | 40 km |
| 2018 | Trami | Category 1 | 92 mph | 71 km |
| 2018 | Cimaron | Category 1 | 92 mph | 60 km |
| 2018 | Jongdari | Category 1 | 81 mph | 164 km |
| 2017 | Lan | Category 2 | 104 mph | 207 km |
| 2017 | Noru | Category 1 | 69 mph | 50 km |
| 2016 | Malakas | Category 1 | 86 mph | 246 km |
| 2015 | Nangka | Category 1 | 81 mph | 184 km |
| 2014 | Phanfone | Category 2 | 92 mph | 140 km |
| 2014 | Halong | Category 1 | 81 mph | 244 km |
| 2012 | Jelawat | Category 1 | 92 mph | 206 km |
| 2011 | Roke | Category 3 | 98 mph | 148 km |
| 2011 | Ma-on | Category 1 | 86 mph | 112 km |
| 2009 | Melor | Category 1 | 86 mph | 127 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 153 km |
| 2005 | Mawar | Category 2 | 92 mph | 242 km |
| 2004 | Ma-on | Category 4 | 92 mph | 228 km |
| 2004 | Chaba | Category 1 | 69 mph | 198 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
19 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 | 149 km |
| 1707 | NANKAIDO | Earthquake | 25.7 m | 5,000 | 144 km |
| 1927 | SW. HONSHU ISLAND | Eruption + Earthquake | 11.3 m | 3,022 | 133 km |
| 1711 | SEIONAIKAI, JAPAN | Earthquake | 2.0 m | 1,000 | 122 km |
| 1520 | KII, KUMANANONADA | Earthquake | 2.0 m | — | 128 km |
| 1510 | OSAKA BAY | Earthquake | 2.0 m | — | 22 km |
| 1403 | KUMANONADA | Earthquake | 2.0 m | — | 135 km |
| 922 | KUMANONADA | Earthquake | 2.0 m | — | 145 km |
| 1909 | ANEGAWA, JAPAN | Earthquake | 1.8 m | 41 | 141 km |
| 1808 | E. AWA, TOKUSHIMA PREFECTURE | Earthquake | 1.5 m | — | 75 km |
| 1948 | TOKAIDO | Earthquake | 0.6 m | — | 149 km |
| 1995 | KOBE, JAPAN | Earthquake | 0.3 m | 6,434 | 30 km |
| 1791 | OASAKA BAY | Earthquake | — | — | 12 km |
| 1498 | NANKAIDO | Earthquake | — | — | 103 km |
| 1360 | KUMANONADA | Earthquake | — | — | 139 km |
| 1331 | OFF TANABE, WAKAYAMA PREFECTURE | Earthquake | — | — | 80 km |
| 745 | OSAKA BAY, JAPAN | Earthquake | — | — | 20 km |
| 704 | KUMANONADA | Earthquake | — | — | 145 km |
| 701 | SEA OF JAPAN | Earthquake | — | — | 143 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 1.7 in | Coldest |
| February | 42°F (5°C) | 2.2 in | |
| March | 47°F (8°C) | 3.7 in | |
| April | 57°F (14°C) | 5.3 in | |
| May | 65°F (18°C) | 5.6 in | |
| June | 72°F (22°C) | 8.6 in | Wettest |
| July | 81°F (27°C) | 5.9 in | |
| August | 81°F (27°C) | 4.1 in | Warmest |
| September | 74°F (23°C) | 7.6 in | |
| October | 64°F (18°C) | 4.6 in | |
| November | 55°F (13°C) | 3.0 in | |
| December | 46°F (8°C) | 1.5 in | Driest |
Izumisano has a seasonal temperature swing of 40°F / from 41°F in January to 81°F in August. Total annual precipitation is 53.7 inches, with June being the wettest month (8.6") and December the driest (1.5").