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Weather & Climate in Ashiya, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ashiya 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 46 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 | 46 ft (14 m) |
| Area | 7.1 sq mi (18.5 km²) |
| Population Density | 13,173/sq mi |
| Coordinates | 34.7281°N, 135.3026°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
343 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 | 31 km | 22 km |
| Apr 11, 1990 | 11 km ENE of Maizuru, Japan | M6.1 | 84 km | 362 km |
| Jun 1, 1998 | 17 km SW of Owase, Japan | M5.8 | 113 km | 399 km |
| Apr 12, 2013 | 6 km WNW of Sumoto, Japan | M5.8 | 59 km | 14 km |
| Aug 7, 1992 | 21 km N of Miyazu, Japan | M5.8 | 112 km | 358 km |
| Aug 20, 1999 | 22 km SE of Kainan, Japan | M5.7 | 79 km | 66 km |
| Oct 30, 2000 | western Honshu, Japan | M5.5 | 96 km | 35 km |
| Jun 17, 2018 | near the south coast of western Honshu, Japan | M5.5 | 33 km | 10 km |
| Apr 21, 2000 | 27 km NNE of Maizuru, Japan | M5.5 | 106 km | 347 km |
| Sep 24, 2003 | 5 km WNW of Ayabe, Japan | M5.4 | 66 km | 372 km |
| May 9, 2022 | 7 km NE of Toba, Japan | M5.3 | 147 km | 329 km |
| Jan 6, 2004 | 36 km S of Ise, Japan | M5.3 | 141 km | 33 km |
| Jan 11, 2001 | 15 km E of Tottori, Japan | M5.3 | 117 km | 33 km |
| Apr 22, 1998 | 18 km SE of Hikone, Japan | M5.2 | 112 km | 33 km |
| Mar 13, 2019 | 22 km ESE of Anan, Japan | M5.2 | 110 km | 37 km |
| Apr 14, 2000 | 10 km SSW of Tanabe, Japan | M5.1 | 119 km | 35 km |
| May 28, 1994 | 12 km WNW of Nagahama, Japan | M5.1 | 107 km | 49 km |
| Jun 10, 2009 | 7 km WSW of Ise, Japan | M5.1 | 125 km | 352 km |
| Apr 15, 2007 | 11 km ENE of Ueno-ebisumachi, Japan | M5.1 | 86 km | 16 km |
| Mar 16, 1999 | 10 km WNW of Kitahama, Japan | M5.1 | 72 km | 33 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
50 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 | 120 km |
| 2019 | Hagibis | Category 2 | 92 mph | 290 km |
| 2018 | Jebi | Category 3 | 98 mph | 60 km |
| 2018 | Trami | Category 1 | 92 mph | 105 km |
| 2018 | Cimaron | Category 1 | 86 mph | 57 km |
| 2018 | Jongdari | Category 1 | 81 mph | 166 km |
| 2017 | Lan | Category 2 | 104 mph | 229 km |
| 2017 | Noru | Category 1 | 69 mph | 83 km |
| 2016 | Malakas | Category 1 | 86 mph | 272 km |
| 2015 | Nangka | Category 1 | 81 mph | 213 km |
| 2014 | Phanfone | Category 2 | 92 mph | 158 km |
| 2014 | Halong | Category 1 | 81 mph | 267 km |
| 2012 | Jelawat | Category 1 | 92 mph | 240 km |
| 2011 | Roke | Category 3 | 98 mph | 166 km |
| 2011 | Ma-on | Category 1 | 86 mph | 141 km |
| 2009 | Melor | Category 1 | 86 mph | 144 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 187 km |
| 2005 | Mawar | Category 2 | 92 mph | 266 km |
| 2004 | Ma-on | Category 4 | 92 mph | 254 km |
| 2004 | Songda | Category 2 | 86 mph | 273 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
13 tsunamis recorded within 500 km. Highest wave on record: 11.3 m (37 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1927 | SW. HONSHU ISLAND | Eruption + Earthquake | 11.3 m | 3,022 | 99 km |
| 1711 | SEIONAIKAI, JAPAN | Earthquake | 2.0 m | 1,000 | 129 km |
| 1510 | OSAKA BAY | Earthquake | 2.0 m | - | 17 km |
| 1909 | ANEGAWA, JAPAN | Earthquake | 1.8 m | 41 | 118 km |
| 1808 | E. AWA, TOKUSHIMA PREFECTURE | Earthquake | 1.5 m | - | 103 km |
| 1995 | KOBE, JAPAN | Earthquake | 0.3 m | 6,434 | 26 km |
| 1791 | OASAKA BAY | Earthquake | - | - | 27 km |
| 1666 | AICHI PREFECTURE | Earthquake | - | - | 140 km |
| 1586 | ISE BAY | Earthquake | - | 8,000 | 140 km |
| 1498 | NANKAIDO | Earthquake | - | - | 137 km |
| 1331 | OFF TANABE, WAKAYAMA PREFECTURE | Earthquake | - | - | 115 km |
| 745 | OSAKA BAY, JAPAN | Earthquake | - | - | 14 km |
| 701 | SEA OF JAPAN | Earthquake | - | - | 108 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 1.9 in | |
| February | 38°F (4°C) | 2.5 in | Coldest |
| March | 44°F (7°C) | 4.0 in | |
| April | 54°F (12°C) | 5.5 in | |
| May | 63°F (17°C) | 5.9 in | |
| June | 70°F (21°C) | 8.9 in | Wettest |
| July | 81°F (27°C) | 7.1 in | Warmest |
| August | 79°F (26°C) | 4.7 in | |
| September | 72°F (22°C) | 7.7 in | |
| October | 61°F (16°C) | 4.5 in | |
| November | 52°F (11°C) | 2.9 in | |
| December | 42°F (6°C) | 1.6 in | Driest |
Ashiya has a seasonal temperature swing of 42°F / from 38°F in February to 81°F in July. Total annual precipitation is 57.1 inches, with June being the wettest month (8.9") and December the driest (1.6").