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Weather & Climate in Arai, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Arai experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 34°F in January while summers reach 75°F in July. The area gets 171 sunny days per year. Annual precipitation totals 90.8 inches (wetter than the 38-inch national average). The area receives 20.6 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 574 feet.
Temperature
34°F Jan (1°C)
75°F Jul (24°C)
| Annual Average | 54.9°F |
| 2% above US avg | |
| January Average | 34°F (1°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 171 days/yr |
Geography
| Elevation | 574 ft (175 m) |
| Area | 255.0 sq mi (660.5 km²) |
| Population Density | 108/sq mi |
| Coordinates | 37.0006°N, 138.2259°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
658 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.5.
| Jan 1, 2024 | 2024 Noto Peninsula, Japan Earthquake | M7.5 | 100 km | 10 km |
| Mar 25, 2007 | 46 km NW of Nanao, Japan | M6.7 | 150 km | 8 km |
| Feb 7, 1993 | 69 km NNE of Nanao, Japan | M6.6 | 112 km | 11 km |
| Jul 16, 2007 | 20 km NNW of Kashiwazaki, Japan | M6.6 | 63 km | 12 km |
| May 5, 2023 | 49 km NE of Anamizu, Japan | M6.2 | 102 km | 10 km |
| Mar 11, 2011 | 13 km E of Arai, Japan | M6.2 | 13 km | 9 km |
| Jan 1, 2024 | 8 km SW of Anamizu, Japan | M6.2 | 126 km | 10 km |
| Jan 9, 2024 | 53 km WSW of Sado, Japan | M5.9 | 104 km | 10 km |
| Apr 16, 2011 | 6 km ENE of Tanuma, Japan | M5.8 | 145 km | 77 km |
| Jan 1, 2024 | 42 km NE of Anamizu, Japan | M5.8 | 102 km | 10 km |
| Feb 25, 2013 | 29 km NE of Numata, Japan | M5.8 | 92 km | 10 km |
| Jul 16, 2007 | 16 km NNW of Kashiwazaki, Japan | M5.7 | 60 km | 15 km |
| Mar 11, 2011 | eastern Honshu, Japan | M5.7 | 9 km | 12 km |
| Jun 2, 2024 | 40 km NE of Anamizu, Japan | M5.7 | 98 km | 9 km |
| Dec 3, 1996 | 35 km SE of Muramatsu, Japan | M5.7 | 123 km | 139 km |
| Jan 1, 2024 | 7 km N of Anamizu, Japan | M5.6 | 123 km | 10 km |
| Jan 1, 2024 | 54 km NE of Anamizu, Japan | M5.6 | 93 km | 10 km |
| May 5, 2023 | 43 km NE of Anamizu, Japan | M5.6 | 100 km | 10 km |
| Apr 11, 2011 | 8 km WSW of Iiyama, Japan | M5.5 | 22 km | 17 km |
| Jan 1, 2024 | 56 km NE of Anamizu, Japan | M5.5 | 93 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
27 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2019 | Faxai | Category 2 | 92 mph | 224 km |
| 2019 | Hagibis | Category 1 | 92 mph | 188 km |
| 2018 | Jebi | Category 2 | 98 mph | 148 km |
| 2018 | Jongdari | Category 1 | 75 mph | 296 km |
| 2014 | Phanfone | Category 1 | 75 mph | 234 km |
| 2011 | Roke | Category 1 | 92 mph | 150 km |
| 2007 | Fitow | Category 1 | 75 mph | 179 km |
| 2005 | Mawar | Category 2 | 81 mph | 233 km |
| 2004 | Ma-on | Category 3 | 92 mph | 210 km |
| 2004 | Songda | Category 1 | 75 mph | 278 km |
| 2004 | Chaba | Category 1 | 69 mph | 200 km |
| 2003 | Etau | Category 1 | 58 mph | 239 km |
| 2002 | Higos | Category 1 | 81 mph | 193 km |
| 2001 | Danas | Category 1 | 63 mph | 201 km |
| 2000 | Kirogi | Category 1 | 81 mph | 280 km |
| 1998 | Vicki | Category 2 | 69 mph | 73 km |
| 1998 | Zeb | Category 1 | 58 mph | 232 km |
| 1998 | Stella | Category 1 | 69 mph | 159 km |
| 1996 | Kirk | Category 1 | 63 mph | 162 km |
| 1995 | Ryan | Category 1 | 40 mph | 251 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
14 tsunamis recorded within 500 km. Highest wave on record: 11.3 m (37 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2024 | HONSHU: W COAST | Eruption + Earthquake | 11.3 m | 549 | 100 km |
| 1993 | HONSHU ISLAND | Earthquake | 0.5 m | - | 112 km |
| 1987 | HONSHU ISLAND | Earthquake | 0.2 m | - | 59 km |
| 2023 | NOTO PENINSULA, JAPAN | Earthquake | 0.1 m | 1 | 101 km |
| 2007 | HONSHU: W COAST | Earthquake | 0.1 m | 1 | 150 km |
| 2007 | HONSHU: W COAST | Earthquake | - | 15 | 67 km |
| 1892 | SW. HONSHU ISLAND | Earthquake | - | 1 | 127 km |
| 1802 | NW. HONSHU ISLAND | Earthquake | - | 19 | 78 km |
| 1762 | NW. HONSHU ISLAND | Earthquake | - | - | 129 km |
| 1751 | NW. HONSHU ISLAND | Eruption + Earthquake | - | 2,100 | 25 km |
| 1614 | NIIGATA PREFECTURE | Earthquake | - | - | 59 km |
| 1448 | SADO, JAPAN | Earthquake | - | - | 56 km |
| 887 | NIIGATA | Earthquake | - | 2,000 | 57 km |
| 863 | NW. HONSHU ISLAND | Eruption + Earthquake | - | - | 23 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Myokosan (16 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 16 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 19 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 44 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 50 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 71 km |
| Midagahara | Stratovolcano | 2,621 m (8,599 ft) | 1839 | 74 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 81 km |
| Washiba-Kumonotaira | Shield(s) | 2,924 m (9,593 ft) | Unknown | 87 km |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 94 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 99 km |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 102 km |
| Yakedake | Stratovolcano(es) | 2,455 m (8,054 ft) | 1995 | 103 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 105 km |
| Nantaisan | Stratovolcano | 2,486 m (8,156 ft) | -9540 | 116 km |
| Omanago Group | Lava dome(s) | 2,341 m (7,680 ft) | -3050 | 116 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 12.6 in | Coldest |
| February | 34°F (1°C) | 8.1 in | |
| March | 39°F (4°C) | 5.8 in | |
| April | 51°F (11°C) | 3.7 in | Driest |
| May | 60°F (16°C) | 3.8 in | |
| June | 68°F (20°C) | 5.7 in | |
| July | 75°F (24°C) | 7.7 in | |
| August | 78°F (26°C) | 6.1 in | Warmest |
| September | 70°F (21°C) | 8.1 in | |
| October | 59°F (15°C) | 7.2 in | |
| November | 49°F (9°C) | 9.5 in | |
| December | 40°F (4°C) | 12.6 in | Wettest |
Arai has a seasonal temperature swing of 44°F / from 34°F in January to 78°F in August. Total annual precipitation is 90.8 inches, with December being the wettest month (12.6") and April the driest (3.7").