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Weather & Climate in Niimi, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Niimi experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 35°F in January while summers reach 76°F in July. The area gets 221 sunny days per year, above the national average. Annual precipitation totals 63.2 inches (wetter than the 38-inch national average). The area receives 5.4 inches of snow annually. The city sits at an elevation of 633 feet.
Temperature
35°F Jan (1°C)
76°F Jul (24°C)
| Annual Average | 54.8°F |
| 1% above US avg | |
| January Average | 35°F (1°C) |
| July Average | 76°F (24°C) |
| Sunny Days | 221 days/yr |
Geography
| Elevation | 633 ft (193 m) |
| Area | 306.3 sq mi (793.3 km²) |
| Population Density | 100/sq mi |
| Coordinates | 34.9833°N, 133.4667°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
80 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 | 149 km | 22 km |
| Mar 24, 2001 | 16 km SSW of Kure, Japan | M6.8 | 132 km | 50 km |
| Oct 6, 2000 | 8 km ESE of Matsue, Japan | M6.7 | 61 km | 10 km |
| Apr 12, 2013 | 6 km WNW of Sumoto, Japan | M5.8 | 142 km | 14 km |
| Apr 8, 2018 | 8 km NNE of ?dach?-?da, Japan | M5.7 | 89 km | 10 km |
| Aug 28, 1991 | 9 km SSW of Yasugich?, Japan | M5.5 | 46 km | 13 km |
| Oct 8, 2000 | 32 km N of Sh?bara, Japan | M5.4 | 43 km | 10 km |
| Jan 11, 2001 | 15 km E of Tottori, Japan | M5.3 | 101 km | 33 km |
| Sep 16, 2002 | 24 km SW of Kurayoshi, Japan | M5.3 | 35 km | 10 km |
| Sep 3, 1997 | 21 km S of Yasugich?, Japan | M5.3 | 35 km | 10 km |
| Oct 8, 2000 | 8 km SSW of Yonago, Japan | M5.2 | 45 km | 10 km |
| Mar 25, 2001 | 22 km WNW of H?j?, Japan | M5.2 | 137 km | 43 km |
| Apr 26, 2007 | 15 km ESE of Niihama, Japan | M5.1 | 120 km | 50 km |
| Jun 3, 2011 | 9 km ENE of G?tsuch?, Japan | M5.0 | 104 km | 10 km |
| Jan 16, 1995 | 20 km SW of Akashi, Japan | M5.0 | 134 km | 10 km |
| Sep 28, 1990 | 24 km NNW of Kariya, Japan | M4.9 | 72 km | 26 km |
| Oct 4, 2011 | 14 km SW of Wakimachi, Japan | M4.8 | 125 km | 43 km |
| May 26, 2005 | 6 km SSW of Kan’onjich?, Japan | M4.8 | 103 km | 38 km |
| Apr 8, 2018 | 6 km S of ?dach?-?da, Japan | M4.7 | 89 km | 9 km |
| Feb 18, 1995 | 16 km NW of Sumoto, Japan | M4.7 | 132 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
42 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2023 | Lan | Category 2 | 75 mph | 250 km |
| 2018 | Jebi | Category 3 | 98 mph | 152 km |
| 2018 | Trami | Category 1 | 92 mph | 216 km |
| 2018 | Cimaron | Category 1 | 86 mph | 120 km |
| 2017 | Noru | Category 1 | 69 mph | 181 km |
| 2016 | Malakas | Category 1 | 81 mph | 243 km |
| 2015 | Goni | Category 3 | 98 mph | 226 km |
| 2015 | Nangka | Category 1 | 81 mph | 234 km |
| 2014 | Phanfone | Category 1 | 86 mph | 284 km |
| 2014 | Halong | Category 1 | 81 mph | 221 km |
| 2012 | Jelawat | Category 1 | 92 mph | 296 km |
| 2011 | Ma-on | Category 1 | 86 mph | 182 km |
| 2008 | Sinlaku | Category 1 | 75 mph | 277 km |
| 2007 | Usagi | Category 2 | 92 mph | 160 km |
| 2007 | Man-yi | Category 1 | 75 mph | 261 km |
| 2005 | Nabi | Category 1 | 75 mph | 198 km |
| 2004 | Songda | Category 2 | 86 mph | 120 km |
| 2004 | Chaba | Category 2 | 92 mph | 28 km |
| 2003 | Etau | Category 2 | 86 mph | 144 km |
| 1999 | Bart | Category 2 | 92 mph | 112 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 3.0 m (10 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1872 | SW. HONSHU ISLAND | Earthquake | 3.0 m | 804 | 134 km |
| 1711 | SEIONAIKAI, JAPAN | Earthquake | 2.0 m | 1,000 | 90 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
3 volcanoes within 200 km. Closest: Sanbesan (79 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Sanbesan | Stratovolcano | 1,126 m (3,694 ft) | 650 | 79 km |
| Oki-Dogo | Shield | 151 m (495 ft) | Unknown | 133 km |
| Abu | Shield(s) | 641 m (2,103 ft) | -6850 | 179 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (1°C) | 2.4 in | Coldest |
| February | 35°F (2°C) | 3.0 in | |
| March | 41°F (5°C) | 3.9 in | |
| April | 52°F (11°C) | 5.4 in | |
| May | 60°F (16°C) | 5.8 in | |
| June | 68°F (20°C) | 9.3 in | |
| July | 76°F (24°C) | 9.8 in | Wettest |
| August | 77°F (25°C) | 6.0 in | Warmest |
| September | 69°F (21°C) | 8.1 in | |
| October | 58°F (14°C) | 4.3 in | |
| November | 48°F (9°C) | 2.8 in | |
| December | 39°F (4°C) | 2.2 in | Driest |
Niimi has a seasonal temperature swing of 42°F / from 35°F in January to 77°F in August. Total annual precipitation is 63.2 inches, with July being the wettest month (9.8") and December the driest (2.2").