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Weather & Climate in Oga, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Oga experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 32°F in January while summers reach 72°F in July. The area gets 224 sunny days per year, above the national average. Annual precipitation totals 61.7 inches (wetter than the 38-inch national average). The area receives 8.9 inches of snow annually. The city sits at an elevation of 20 feet.
Temperature
32°F Jan (0°C)
72°F Jul (22°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 32°F (0°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 224 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 93.1 sq mi (241.1 km²) |
| Population Density | 270/sq mi |
| Coordinates | 39.8710°N, 139.8493°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
428 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.9.
| Jun 13, 2008 | 24 km WSW of Mizusawa, Japan | M6.9 | 129 km | 8 km |
| Jul 23, 2008 | 29 km ENE of Morioka, Japan | M6.8 | 138 km | 108 km |
| Dec 2, 2001 | 3 km NW of Hanamaki, Japan | M6.5 | 118 km | 124 km |
| Jun 18, 2019 | 31 km WSW of Tsuruoka, Japan | M6.4 | 141 km | 12 km |
| Mar 11, 2011 | 88 km WNW of Noshiro, Japan | M6.2 | 96 km | 10 km |
| Aug 10, 1996 | 25 km NE of Shinj?, Japan | M6.0 | 122 km | 10 km |
| Sep 3, 1998 | 19 km W of Shizukuishi, Japan | M5.9 | 80 km | 38 km |
| Apr 16, 2008 | 6 km ENE of Yuza, Japan | M5.8 | 95 km | 166 km |
| Aug 10, 1996 | 31 km ENE of Shinj?, Japan | M5.7 | 129 km | 10 km |
| Oct 26, 1997 | 8 km WSW of Yokote, Japan | M5.6 | 83 km | 134 km |
| Nov 23, 1997 | 97 km W of Tenn?, Japan | M5.6 | 88 km | 23 km |
| Jul 9, 2015 | 15 km S of Hachinohe, Japan | M5.5 | 148 km | 81 km |
| Aug 10, 1996 | 26 km S of Yuzawa, Japan | M5.5 | 120 km | 10 km |
| Jun 14, 2008 | 35 km SSE of Yuzawa, Japan | M5.5 | 131 km | 6 km |
| Jun 14, 2014 | 12 km WNW of Hanamaki, Japan | M5.5 | 109 km | 92 km |
| Jun 14, 2008 | 27 km WSW of Mizusawa, Japan | M5.4 | 127 km | 10 km |
| May 12, 2002 | 12 km WSW of Kitakami, Japan | M5.4 | 122 km | 96 km |
| Aug 24, 2009 | 34 km NW of Shimokizukuri, Japan | M5.3 | 129 km | 176 km |
| Aug 13, 1996 | 20 km ENE of Shinj?, Japan | M5.3 | 128 km | 10 km |
| Feb 26, 1999 | 15 km NNW of Yuza, Japan | M5.3 | 80 km | 34 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Hurricane History
5 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 1.
| Year | Name | Category | Max Wind | Closest |
| 2019 | Hagibis | Category 1 | 69 mph | 251 km |
| 2002 | Higos | Category 1 | 75 mph | 149 km |
| 2000 | Kirogi | Category 1 | 63 mph | 267 km |
| 1998 | Vicki | Category 1 | 58 mph | 143 km |
| 1995 | Ryan | Category 1 | 40 mph | 150 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tsunami History
17 tsunamis recorded within 500 km. Highest wave on record: 14.9 m (49 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1983 | NOSHIRO, JAPAN | Earthquake | 14.9 m | 104 | 91 km |
| 1833 | NW. HONSHU ISLAND | Earthquake | 9.0 m | 85 | 124 km |
| 2008 | ARATOZAWA, JAPAN | Eruption + Earthquake | 2.5 m | 23 | 129 km |
| 1793 | W. OFF AOMORI | Earthquake | 1.8 m | 12 | 109 km |
| 1939 | NW. HONSHU ISLAND | Earthquake | 1.2 m | 27 | 39 km |
| 1810 | NW. HONSHU ISLAND | Earthquake | 1.0 m | 57 | 5 km |
| 1804 | NW. HONSHU ISLAND | Earthquake | 1.0 m | 450 | 92 km |
| 1983 | NOSHIRO, JAPAN | Earthquake | 0.6 m | - | 88 km |
| 1964 | NW. HONSHU ISLAND | Earthquake | 0.6 m | - | 87 km |
| 2019 | NIIGATA | Earthquake | 0.1 m | - | 140 km |
| 1964 | NW. HONSHU ISLAND | Earthquake | 0.1 m | - | 100 km |
| 1964 | NW. HONSHU ISLAND | Earthquake | - | - | 93 km |
| 1894 | YAMAGATA, JAPAN | Earthquake | - | 726 | 108 km |
| 1766 | SANRIKU | Earthquake | - | 1,700 | 135 km |
| 1644 | HONJO, AKITA | Earthquake | - | 117 | 57 km |
| 1341 | JUSANKO, TSUGARU AOMORI PREFECTURE | Earthquake | - | 2,600 | 129 km |
| 850 | NW. HONSHU ISLAND | Eruption + Earthquake | - | - | 97 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
14 volcanoes within 200 km. Closest: Megata (13 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Megata | Maar(s) | 291 m (955 ft) | -2050 | 13 km |
| Akita-Yakeyama | Stratovolcano | 1,366 m (4,482 ft) | 1997 | 78 km |
| Akita-Komagatake | Stratovolcano(es) | 1,637 m (5,371 ft) | 1971 | 82 km |
| Hachimantai | Stratovolcano | 1,613 m (5,292 ft) | -5350 | 86 km |
| Chokaisan | Stratovolcano(es) | 2,236 m (7,336 ft) | 1974 | 88 km |
| Iwakisan | Stratovolcano | 1,625 m (5,331 ft) | 1863 | 95 km |
| Iwatesan | Complex | 2,038 m (6,686 ft) | 1919 | 98 km |
| Towada | Caldera | 1,011 m (3,317 ft) | 915 | 113 km |
| Hakkodasan | Stratovolcano(es) | 1,585 m (5,200 ft) | 1550 | 124 km |
| Kurikomayama | Stratovolcano | 1,627 m (5,338 ft) | 1950 | 129 km |
| Naruko | Caldera | 470 m (1,542 ft) | 837 | 148 km |
| Oshima-Oshima | Stratovolcano | 732 m (2,402 ft) | 1790 | 187 km |
| Osorezan | Stratovolcano | 878 m (2,881 ft) | 1787 | 190 km |
| Zaozan [Zaosan] | Complex | 1,841 m (6,040 ft) | 1940 | 199 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 5.0 in | Coldest |
| February | 33°F (0°C) | 3.9 in | |
| March | 38°F (3°C) | 3.6 in | Driest |
| April | 48°F (9°C) | 4.0 in | |
| May | 57°F (14°C) | 3.9 in | |
| June | 65°F (18°C) | 4.5 in | |
| July | 72°F (22°C) | 6.4 in | |
| August | 76°F (24°C) | 5.9 in | Warmest |
| September | 68°F (20°C) | 6.8 in | Wettest |
| October | 57°F (14°C) | 5.7 in | |
| November | 46°F (8°C) | 5.8 in | |
| December | 37°F (3°C) | 6.2 in |
Oga has a seasonal temperature swing of 43°F / from 32°F in January to 76°F in August. Total annual precipitation is 61.7 inches, with September being the wettest month (6.8") and March the driest (3.6").