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Weather & Climate in Uonuma, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Uonuma experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 29°F in January while summers reach 74°F in July. The area gets 184 sunny days per year. Annual precipitation totals 83.6 inches (wetter than the 38-inch national average). The area receives 23.2 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 312 feet.
Temperature
29°F Jan (-2°C)
74°F Jul (23°C)
| Annual Average | 52.3°F |
| 3% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 184 days/yr |
Geography
| Elevation | 312 ft (95 m) |
| Area | 365.6 sq mi (946.9 km²) |
| Population Density | 94/sq mi |
| Coordinates | 37.2449°N, 138.9623°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
778 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.6.
| Apr 11, 2011 | 17 km SSW of Ishikawa, Japan | M6.6 | 130 km | 11 km |
| Jul 16, 2007 | 20 km NNW of Kashiwazaki, Japan | M6.6 | 56 km | 12 km |
| Mar 11, 2011 | 13 km E of Arai, Japan | M6.2 | 58 km | 9 km |
| Apr 12, 2011 | 8 km WSW of Ishikawa, Japan | M5.9 | 126 km | 11 km |
| Jan 9, 2024 | 53 km WSW of Sado, Japan | M5.9 | 125 km | 10 km |
| Feb 25, 2013 | 29 km NE of Numata, Japan | M5.8 | 51 km | 10 km |
| Apr 16, 2011 | 6 km ENE of Tanuma, Japan | M5.8 | 114 km | 77 km |
| Dec 3, 1996 | 35 km SE of Muramatsu, Japan | M5.7 | 53 km | 139 km |
| Jul 16, 2007 | 16 km NNW of Kashiwazaki, Japan | M5.7 | 52 km | 15 km |
| Mar 19, 2011 | 8 km WNW of Daigo, Japan | M5.7 | 126 km | 6 km |
| Mar 11, 2011 | eastern Honshu, Japan | M5.7 | 68 km | 12 km |
| Jan 1, 2024 | 54 km NE of Anamizu, Japan | M5.6 | 141 km | 10 km |
| Jan 1, 2024 | 56 km NE of Anamizu, Japan | M5.5 | 140 km | 10 km |
| Mar 22, 2011 | 19 km ESE of Ishikawa, Japan | M5.5 | 150 km | 18 km |
| Apr 11, 2011 | 20 km SSW of Ishikawa, Japan | M5.5 | 127 km | 10 km |
| Apr 11, 2011 | 8 km WSW of Iiyama, Japan | M5.5 | 77 km | 17 km |
| Sep 29, 2010 | 35 km NNW of Kuroiso, Japan | M5.5 | 82 km | 33 km |
| Mar 22, 2011 | 12 km ESE of Ishikawa, Japan | M5.5 | 144 km | 38 km |
| Jul 15, 2011 | 5 km NE of Sakai, Japan | M5.5 | 147 km | 89 km |
| Apr 1, 1995 | 8 km NE of Kameda-honch?, Japan | M5.4 | 78 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
24 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 | 200 km |
| 2019 | Hagibis | Category 1 | 92 mph | 142 km |
| 2018 | Jebi | Category 1 | 86 mph | 209 km |
| 2014 | Phanfone | Category 1 | 75 mph | 266 km |
| 2011 | Roke | Category 1 | 86 mph | 151 km |
| 2007 | Fitow | Category 1 | 75 mph | 184 km |
| 2005 | Mawar | Category 2 | 75 mph | 209 km |
| 2004 | Ma-on | Category 3 | 92 mph | 198 km |
| 2004 | Chaba | Category 1 | 69 mph | 262 km |
| 2002 | Higos | Category 1 | 81 mph | 171 km |
| 2001 | Danas | Category 1 | 63 mph | 159 km |
| 2000 | Kirogi | Category 1 | 81 mph | 224 km |
| 1998 | Vicki | Category 2 | 69 mph | 143 km |
| 1998 | Stella | Category 1 | 69 mph | 134 km |
| 1996 | Violet | Category 1 | 81 mph | 290 km |
| 1996 | Kirk | Category 1 | 63 mph | 228 km |
| 1995 | Ryan | Category 1 | 40 mph | 287 km |
| 1994 | Orchid | Category 1 | 69 mph | 198 km |
| 1993 | Vernon | Category 1 | 75 mph | 212 km |
| 1991 | Mireille | Category 1 | 98 mph | 297 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
11 tsunamis recorded within 500 km. Highest wave on record: 5.8 m (19 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1964 | NW. HONSHU ISLAND | Earthquake | 5.8 m | 36 | 129 km |
| 1987 | HONSHU ISLAND | Earthquake | 0.2 m | - | 100 km |
| 2023 | NOTO PENINSULA, JAPAN | Earthquake | 0.1 m | 1 | 150 km |
| 2007 | HONSHU: W COAST | Earthquake | - | 15 | 56 km |
| 1802 | NW. HONSHU ISLAND | Earthquake | - | 19 | 77 km |
| 1762 | NW. HONSHU ISLAND | Earthquake | - | - | 98 km |
| 1751 | NW. HONSHU ISLAND | Eruption + Earthquake | - | 2,100 | 77 km |
| 1614 | NIIGATA PREFECTURE | Earthquake | - | - | 90 km |
| 1448 | SADO, JAPAN | Earthquake | - | - | 73 km |
| 887 | NIIGATA | Earthquake | - | 2,000 | 81 km |
| 863 | NW. HONSHU ISLAND | Eruption + Earthquake | - | - | 87 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Hiuchigatake (43 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 43 km |
| Numazawa | Shield | 835 m (2,740 ft) | -3400 | 58 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 62 km |
| Omanago Group | Lava dome(s) | 2,341 m (7,680 ft) | -3050 | 70 km |
| Nantaisan | Stratovolcano | 2,486 m (8,156 ft) | -9540 | 71 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 73 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 79 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 80 km |
| Takaharayama | Stratovolcano | 1,795 m (5,889 ft) | -4570 | 82 km |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 85 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 86 km |
| Nasudake | Stratovolcano(es) | 1,915 m (6,283 ft) | 1963 | 90 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 90 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 101 km |
| Bandaisan | Stratovolcano | 1,816 m (5,958 ft) | 1888 | 106 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 10.6 in | Coldest |
| February | 30°F (-1°C) | 7.4 in | |
| March | 35°F (2°C) | 5.2 in | |
| April | 48°F (9°C) | 4.5 in | |
| May | 59°F (15°C) | 4.1 in | Driest |
| June | 67°F (19°C) | 5.6 in | |
| July | 74°F (23°C) | 7.4 in | |
| August | 77°F (25°C) | 5.7 in | Warmest |
| September | 69°F (20°C) | 7.4 in | |
| October | 57°F (14°C) | 6.7 in | |
| November | 47°F (8°C) | 7.7 in | |
| December | 36°F (2°C) | 11.3 in | Wettest |
Uonuma has a seasonal temperature swing of 47°F / from 29°F in January to 77°F in August. Total annual precipitation is 83.6 inches, with December being the wettest month (11.3") and May the driest (4.1").