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Weather & Climate in Chikuma, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Chikuma experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 29°F in January while summers reach 73°F in July. The area gets 254 sunny days per year, above the national average. Annual precipitation totals 45.2 inches. The area receives 6.9 inches of snow annually. The city sits at an elevation of 1,273 feet.
Temperature
29°F Jan (-2°C)
73°F Jul (23°C)
| Annual Average | 51.4°F |
| 5% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 254 days/yr |
Geography
| Elevation | 1,273 ft (388 m) |
| Area | 53.2 sq mi (137.8 km²) |
| Population Density | 1,116/sq mi |
| Coordinates | 36.5272°N, 138.0894°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
732 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.5.
| Jan 1, 2024 | 2024 Noto Peninsula, Japan Earthquake | M7.5 | 129 km | 10 km |
| Feb 7, 1993 | 69 km NNE of Nanao, Japan | M6.6 | 144 km | 11 km |
| Jul 16, 2007 | 20 km NNW of Kashiwazaki, Japan | M6.6 | 117 km | 12 km |
| Mar 11, 2011 | 13 km E of Arai, Japan | M6.2 | 60 km | 9 km |
| May 5, 2023 | 49 km NE of Anamizu, Japan | M6.2 | 133 km | 10 km |
| Jan 1, 2024 | 8 km SW of Anamizu, Japan | M6.2 | 134 km | 10 km |
| Mar 15, 2011 | 6 km NNW of Fujinomiya, Japan | M6.0 | 146 km | 9 km |
| Jan 1, 2024 | 42 km NE of Anamizu, Japan | M5.8 | 131 km | 10 km |
| Feb 25, 2013 | 29 km NE of Numata, Japan | M5.8 | 109 km | 10 km |
| Apr 16, 2011 | 6 km ENE of Tanuma, Japan | M5.8 | 141 km | 77 km |
| Jun 2, 2024 | 40 km NE of Anamizu, Japan | M5.7 | 126 km | 9 km |
| Mar 11, 2011 | eastern Honshu, Japan | M5.7 | 50 km | 12 km |
| Jul 16, 2007 | 16 km NNW of Kashiwazaki, Japan | M5.7 | 114 km | 15 km |
| May 5, 2023 | 43 km NE of Anamizu, Japan | M5.6 | 129 km | 10 km |
| Mar 6, 1996 | 13 km NNE of Gotenba, Japan | M5.6 | 146 km | 33 km |
| Jan 1, 2024 | 7 km N of Anamizu, Japan | M5.6 | 137 km | 10 km |
| Jan 1, 2024 | 54 km NE of Anamizu, Japan | M5.6 | 126 km | 10 km |
| Mar 15, 2012 | 3 km ENE of ?me, Japan | M5.5 | 134 km | 104 km |
| Jan 1, 2024 | 56 km NE of Anamizu, Japan | M5.5 | 127 km | 10 km |
| Apr 11, 2011 | 8 km WSW of Iiyama, Japan | M5.5 | 36 km | 17 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
29 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 3.
| Year | Name | Category | Max Wind | Closest |
| 2019 | Faxai | Category 3 | 98 mph | 199 km |
| 2019 | Hagibis | Category 1 | 92 mph | 157 km |
| 2018 | Jebi | Category 2 | 98 mph | 158 km |
| 2018 | Jongdari | Category 1 | 81 mph | 243 km |
| 2016 | Mindulle | Category 1 | 75 mph | 279 km |
| 2014 | Phanfone | Category 1 | 81 mph | 183 km |
| 2011 | Roke | Category 2 | 92 mph | 122 km |
| 2007 | Fitow | Category 1 | 81 mph | 144 km |
| 2005 | Mawar | Category 2 | 81 mph | 203 km |
| 2004 | Ma-on | Category 3 | 92 mph | 184 km |
| 2004 | Chaba | Category 1 | 69 mph | 205 km |
| 2003 | Etau | Category 1 | 58 mph | 199 km |
| 2002 | Higos | Category 2 | 86 mph | 177 km |
| 2001 | Danas | Category 1 | 81 mph | 182 km |
| 2000 | Kirogi | Category 1 | 86 mph | 272 km |
| 1998 | Vicki | Category 2 | 86 mph | 56 km |
| 1998 | Zeb | Category 1 | 58 mph | 214 km |
| 1998 | Stella | Category 1 | 69 mph | 149 km |
| 1996 | Kirk | Category 1 | 63 mph | 163 km |
| 1995 | Ryan | Category 1 | 40 mph | 281 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 |
| 2024 | HONSHU: W COAST | Eruption + Earthquake | 11.3 m | 549 | 129 km |
| 1993 | HONSHU ISLAND | Earthquake | 0.5 m | - | 144 km |
| 1987 | HONSHU ISLAND | Earthquake | 0.2 m | - | 104 km |
| 2023 | NOTO PENINSULA, JAPAN | Earthquake | 0.1 m | 1 | 132 km |
| 2007 | HONSHU: W COAST | Earthquake | - | 15 | 121 km |
| 1892 | SW. HONSHU ISLAND | Earthquake | - | 1 | 126 km |
| 1802 | NW. HONSHU ISLAND | Earthquake | - | 19 | 132 km |
| 1799 | SW. HONSHU ISLAND | Earthquake | - | - | 133 km |
| 1751 | NW. HONSHU ISLAND | Eruption + Earthquake | - | 2,100 | 75 km |
| 1614 | NIIGATA PREFECTURE | Earthquake | - | - | 109 km |
| 1448 | SADO, JAPAN | Earthquake | - | - | 109 km |
| 887 | NIIGATA | Earthquake | - | 2,000 | 108 km |
| 863 | NW. HONSHU ISLAND | Eruption + Earthquake | - | - | 64 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Kusatsu-Shiranesan (40 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 40 km |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 41 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 41 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 42 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 44 km |
| Midagahara | Stratovolcano | 2,621 m (8,599 ft) | 1839 | 45 km |
| Washiba-Kumonotaira | Shield(s) | 2,924 m (9,593 ft) | Unknown | 46 km |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 53 km |
| Yakedake | Stratovolcano(es) | 2,455 m (8,054 ft) | 1995 | 56 km |
| Norikuradake | Stratovolcano(es) | 3,026 m (9,928 ft) | -50 | 67 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 68 km |
| Ontakesan | Complex | 3,067 m (10,062 ft) | 2014 | 89 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 99 km |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 117 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 119 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 2.4 in | Coldest |
| February | 30°F (-1°C) | 2.4 in | |
| March | 37°F (3°C) | 3.0 in | |
| April | 49°F (10°C) | 3.1 in | |
| May | 58°F (15°C) | 3.6 in | |
| June | 66°F (19°C) | 5.7 in | |
| July | 73°F (23°C) | 5.9 in | |
| August | 75°F (24°C) | 4.3 in | Warmest |
| September | 66°F (19°C) | 6.2 in | Wettest |
| October | 55°F (13°C) | 4.0 in | |
| November | 44°F (7°C) | 2.6 in | |
| December | 35°F (2°C) | 2.0 in | Driest |
Chikuma has a seasonal temperature swing of 46°F / from 29°F in January to 75°F in August. Total annual precipitation is 45.2 inches, with September being the wettest month (6.2") and December the driest (2.0").