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Weather & Climate in Ryōtsu-minato, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ryōtsu-minato experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 35°F in January while summers reach 73°F in July. The area gets 176 sunny days per year. Annual precipitation totals 88.1 inches (wetter than the 38-inch national average). The area receives 17.6 inches of snow annually, a moderate snowfall amount. The city sits at an elevation of 13 feet.
Temperature
35°F Jan (2°C)
73°F Jul (23°C)
| Annual Average | 54.0°F |
| 0% below US avg | |
| January Average | 35°F (2°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 176 days/yr |
Geography
| Elevation | 13 ft (4 m) |
| Area | 3,739.4 sq mi (9,684.9 km²) |
| Population Density | 4/sq mi |
| Coordinates | 38.0782°N, 138.4394°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
390 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.5.
| Jan 1, 2024 | 2024 Noto Peninsula, Japan Earthquake | M7.5 | 122 km | 10 km |
| Jul 16, 2007 | 20 km NNW of Kashiwazaki, Japan | M6.6 | 60 km | 12 km |
| Feb 7, 1993 | 69 km NNE of Nanao, Japan | M6.6 | 116 km | 11 km |
| Jun 18, 2019 | 31 km WSW of Tsuruoka, Japan | M6.4 | 110 km | 12 km |
| Mar 11, 2011 | 13 km E of Arai, Japan | M6.2 | 119 km | 9 km |
| May 5, 2023 | 49 km NE of Anamizu, Japan | M6.2 | 116 km | 10 km |
| Jan 9, 2024 | 53 km WSW of Sado, Japan | M5.9 | 62 km | 10 km |
| Jan 1, 2024 | 42 km NE of Anamizu, Japan | M5.8 | 123 km | 10 km |
| Jun 2, 2024 | 40 km NE of Anamizu, Japan | M5.7 | 125 km | 9 km |
| Dec 3, 1996 | 35 km SE of Muramatsu, Japan | M5.7 | 113 km | 139 km |
| Jul 16, 2007 | 16 km NNW of Kashiwazaki, Japan | M5.7 | 64 km | 15 km |
| Mar 11, 2011 | eastern Honshu, Japan | M5.7 | 127 km | 12 km |
| Jan 1, 2024 | 54 km NE of Anamizu, Japan | M5.6 | 111 km | 10 km |
| May 5, 2023 | 43 km NE of Anamizu, Japan | M5.6 | 122 km | 10 km |
| Apr 11, 2011 | 8 km WSW of Iiyama, Japan | M5.5 | 142 km | 17 km |
| Jan 1, 2024 | 56 km NE of Anamizu, Japan | M5.5 | 108 km | 10 km |
| Apr 1, 1995 | 8 km NE of Kameda-honch?, Japan | M5.4 | 68 km | 11 km |
| Feb 8, 2012 | 45 km WSW of Ry?tsu-minato, Japan | M5.4 | 46 km | 10 km |
| Dec 7, 1990 | 17 km SSW of Kashiwazaki, Japan | M5.3 | 96 km | 10 km |
| Jan 4, 2001 | 20 km WSW of Shiozawa, Japan | M5.3 | 123 km | 21 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
19 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 2.
| Year | Name | Category | Max Wind | Closest |
| 2019 | Hagibis | Category 1 | 81 mph | 224 km |
| 2018 | Jebi | Category 1 | 86 mph | 184 km |
| 2011 | Roke | Category 1 | 81 mph | 251 km |
| 2007 | Fitow | Category 1 | 75 mph | 284 km |
| 2004 | Songda | Category 1 | 75 mph | 232 km |
| 2004 | Chaba | Category 1 | 69 mph | 231 km |
| 2002 | Higos | Category 1 | 75 mph | 207 km |
| 2001 | Danas | Category 1 | 63 mph | 255 km |
| 1999 | Bart | Category 1 | 75 mph | 271 km |
| 1998 | Vicki | Category 2 | 63 mph | 96 km |
| 1998 | Zeb | Category 1 | 58 mph | 299 km |
| 1998 | Stella | Category 1 | 63 mph | 237 km |
| 1996 | Kirk | Category 1 | 63 mph | 210 km |
| 1995 | Ryan | Category 1 | 40 mph | 194 km |
| 1994 | Orchid | Category 1 | 69 mph | 203 km |
| 1993 | Vernon | Category 1 | 75 mph | 287 km |
| 1991 | Mireille | Category 1 | 98 mph | 205 km |
| 1990 | Flo | Category 1 | 58 mph | 246 km |
| 1981 | Thad | Category 1 | — | 274 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
16 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 | 122 km |
| 1833 | NW. HONSHU ISLAND | Earthquake | 9.0 m | 85 | 110 km |
| 1964 | NW. HONSHU ISLAND | Earthquake | 5.8 m | 36 | 77 km |
| 1993 | HONSHU ISLAND | Earthquake | 0.5 m | — | 116 km |
| 1987 | HONSHU ISLAND | Earthquake | 0.2 m | — | 87 km |
| 2019 | NIIGATA | Earthquake | 0.1 m | — | 110 km |
| 2023 | NOTO PENINSULA, JAPAN | Earthquake | 0.1 m | 1 | 116 km |
| 2007 | HONSHU: W COAST | Earthquake | — | 15 | 57 km |
| 1894 | YAMAGATA, JAPAN | Earthquake | — | 726 | 150 km |
| 1802 | NW. HONSHU ISLAND | Earthquake | — | 19 | 44 km |
| 1762 | NW. HONSHU ISLAND | Earthquake | — | — | 23 km |
| 1751 | NW. HONSHU ISLAND | Eruption + Earthquake | — | 2,100 | 102 km |
| 1614 | NIIGATA PREFECTURE | Earthquake | — | — | 75 km |
| 1448 | SADO, JAPAN | Earthquake | — | — | 68 km |
| 887 | NIIGATA | Earthquake | — | 2,000 | 71 km |
| 863 | NW. HONSHU ISLAND | Eruption + Earthquake | — | — | 116 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Numazawa (122 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Numazawa | Shield | 835 m (2,740 ft) | -3400 | 122 km |
| Niigata-Yakeyama | Lava dome | 2,400 m (7,874 ft) | 1998 | 134 km |
| Myokosan | Stratovolcano | 2,454 m (8,051 ft) | -750 | 135 km |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 146 km |
| Bandaisan | Stratovolcano | 1,816 m (5,958 ft) | 1888 | 153 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 155 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 163 km |
| Azumayama | Stratovolcano(es) | 1,949 m (6,394 ft) | 1977 | 163 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 165 km |
| Adatarayama | Stratovolcano(es) | 1,728 m (5,669 ft) | 1996 | 169 km |
| Omanago Group | Lava dome(s) | 2,341 m (7,680 ft) | -3050 | 171 km |
| Nasudake | Stratovolcano(es) | 1,915 m (6,283 ft) | 1963 | 171 km |
| Nantaisan | Stratovolcano | 2,486 m (8,156 ft) | -9540 | 173 km |
| Zaozan [Zaosan] | Complex | 1,841 m (6,040 ft) | 1940 | 175 km |
| Takaharayama | Stratovolcano | 1,795 m (5,889 ft) | -4570 | 176 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 35°F (2°C) | 10.5 in | |
| February | 35°F (2°C) | 7.1 in | Coldest |
| March | 39°F (4°C) | 5.3 in | |
| April | 49°F (10°C) | 4.3 in | Driest |
| May | 58°F (14°C) | 4.3 in | |
| June | 65°F (19°C) | 5.4 in | |
| July | 73°F (23°C) | 7.6 in | |
| August | 76°F (25°C) | 6.3 in | Warmest |
| September | 69°F (21°C) | 8.1 in | |
| October | 59°F (15°C) | 7.1 in | |
| November | 49°F (9°C) | 10.0 in | |
| December | 41°F (5°C) | 12.1 in | Wettest |
Ryōtsu-minato has a seasonal temperature swing of 41°F / from 35°F in February to 76°F in August. Total annual precipitation is 88.1 inches, with December being the wettest month (12.1") and April the driest (4.3").