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Weather & Climate in Shimoikehara, Japan
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Shimoikehara experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 33°F in January while summers reach 71°F in July. The area gets 178 sunny days per year. Annual precipitation totals 86.9 inches (wetter than the 38-inch national average). The area receives 5.9 inches of snow annually. The city sits at an elevation of 702 feet.
Temperature
33°F Jan (1°C)
71°F Jul (22°C)
| Annual Average | 52.2°F |
| 3% below US avg | |
| January Average | 33°F (1°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 178 days/yr |
Geography
| Elevation | 702 ft (214 m) |
| Area | 144.2 sq mi (373.3 km²) |
| Population Density | 5/sq mi |
| Coordinates | 34.0373°N, 135.9660°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Earthquake History
622 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M7.4.
| Sep 5, 2004 | 118 km ESE of Shing?, Japan | M7.4 | 140 km | 10 km |
| Sep 5, 2004 | 94 km SE of Shing?, Japan | M7.2 | 123 km | 14 km |
| Jan 16, 1995 | 8 km S of Akashi, Japan | M6.9 | 106 km | 22 km |
| Sep 6, 2004 | 129 km ESE of Shing?, Japan | M6.6 | 149 km | 10 km |
| Sep 5, 2004 | 119 km ESE of Shing?, Japan | M6.5 | 140 km | 15 km |
| Jul 7, 1995 | 62 km SSE of Toba, Japan | M6.0 | 107 km | 333 km |
| Apr 1, 2016 | 54 km SE of Shing?, Japan | M5.9 | 83 km | 14 km |
| May 23, 1997 | 38 km SSE of Tahara, Japan | M5.8 | 144 km | 11 km |
| Jun 1, 1998 | 17 km SW of Owase, Japan | M5.8 | 15 km | 399 km |
| Apr 12, 2013 | 6 km WNW of Sumoto, Japan | M5.8 | 111 km | 14 km |
| Feb 26, 2025 | 38 km ESE of Shingū, Japan | M5.8 | 61 km | 388 km |
| Aug 20, 1999 | 22 km SE of Kainan, Japan | M5.7 | 52 km | 66 km |
| Sep 5, 2004 | 93 km SE of Shing?, Japan | M5.7 | 117 km | 10 km |
| Nov 18, 2013 | 25 km SE of Toba, Japan | M5.6 | 105 km | 328 km |
| Sep 10, 2004 | 88 km SSE of Shing?, Japan | M5.6 | 119 km | 10 km |
| Feb 22, 2005 | 124 km ESE of Shing?, Japan | M5.6 | 145 km | 370 km |
| Sep 7, 2004 | 116 km ESE of Shing?, Japan | M5.6 | 137 km | 10 km |
| Oct 18, 1996 | 102 km SSE of Toba, Japan | M5.6 | 138 km | 338 km |
| Jun 17, 2018 | near the south coast of western Honshu, Japan | M5.5 | 93 km | 10 km |
| Oct 30, 2000 | western Honshu, Japan | M5.5 | 37 km | 35 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Hurricane History
56 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 4.
| Year | Name | Category | Max Wind | Closest |
| 2025 | Nakri | Category 1 | — | 265 km |
| 2023 | Lan | Category 2 | 81 mph | 45 km |
| 2019 | Faxai | Category 4 | 98 mph | 278 km |
| 2019 | Hagibis | Category 3 | 98 mph | 210 km |
| 2018 | Jebi | Category 3 | 98 mph | 102 km |
| 2018 | Trami | Category 1 | 92 mph | 51 km |
| 2018 | Cimaron | Category 1 | 92 mph | 132 km |
| 2018 | Jongdari | Category 1 | 81 mph | 116 km |
| 2017 | Lan | Category 2 | 104 mph | 134 km |
| 2017 | Noru | Category 1 | 69 mph | 80 km |
| 2016 | Malakas | Category 1 | 81 mph | 267 km |
| 2015 | Nangka | Category 1 | 86 mph | 193 km |
| 2014 | Phanfone | Category 2 | 92 mph | 69 km |
| 2014 | Halong | Category 1 | 81 mph | 273 km |
| 2013 | Wipha | Category 1 | 81 mph | 297 km |
| 2012 | Jelawat | Category 1 | 92 mph | 188 km |
| 2011 | Roke | Category 4 | 98 mph | 78 km |
| 2011 | Ma-on | Category 1 | 86 mph | 135 km |
| 2010 | Chaba | Category 1 | 75 mph | 255 km |
| 2009 | Melor | Category 1 | 92 mph | 59 km |
Source: NOAA IBTrACS (Category 1+, 1980–2026).
Tsunami History
20 tsunamis recorded within 500 km. Highest wave on record: 28.0 m (92 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1854 | NANKAIDO | Earthquake | 28.0 m | 3,000 | 137 km |
| 1707 | NANKAIDO | Earthquake | 25.7 m | 5,000 | 143 km |
| 1944 | OFF SOUTHEAST COAST KII PENINSULA | Earthquake | 10.0 m | 1,223 | 105 km |
| 1096 | ENSHUNADA | Earthquake | 7.0 m | — | 141 km |
| 1946 | HONSHU: S COAST | Earthquake | 6.6 m | 1,362 | 102 km |
| 1520 | KII, KUMANANONADA | Earthquake | 2.0 m | — | 58 km |
| 1510 | OSAKA BAY | Earthquake | 2.0 m | — | 81 km |
| 1408 | KUMANONADA | Earthquake | 2.0 m | — | 90 km |
| 1403 | KUMANONADA | Earthquake | 2.0 m | — | 62 km |
| 922 | KUMANONADA | Earthquake | 2.0 m | — | 73 km |
| 1808 | E. AWA, TOKUSHIMA PREFECTURE | Earthquake | 1.5 m | — | 109 km |
| 1945 | TOKAIDO | Earthquake | 1.0 m | 2,306 | 135 km |
| 2004 | SOUTH COAST HONSHU ISLAND | Earthquake | 0.9 m | — | 140 km |
| 2004 | SOUTH COAST HONSHU ISLAND | Earthquake | 0.6 m | — | 123 km |
| 1948 | TOKAIDO | Earthquake | 0.6 m | — | 110 km |
| 1995 | KOBE, JAPAN | Earthquake | 0.3 m | 6,434 | 103 km |
| 1791 | OASAKA BAY | Earthquake | — | — | 73 km |
| 1708 | TOKAIDO | Earthquake | — | — | 95 km |
| 1666 | AICHI PREFECTURE | Earthquake | — | — | 132 km |
| 1586 | ISE BAY | Earthquake | — | 8,000 | 132 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (1°C) | 2.7 in | Coldest |
| February | 34°F (1°C) | 3.3 in | |
| March | 39°F (4°C) | 5.5 in | |
| April | 50°F (10°C) | 8.0 in | |
| May | 57°F (14°C) | 8.5 in | |
| June | 64°F (18°C) | 12.6 in | Wettest |
| July | 71°F (22°C) | 10.7 in | |
| August | 72°F (22°C) | 10.0 in | Warmest |
| September | 66°F (19°C) | 11.6 in | |
| October | 56°F (13°C) | 7.2 in | |
| November | 47°F (8°C) | 4.5 in | |
| December | 38°F (3°C) | 2.3 in | Driest |
Shimoikehara has a seasonal temperature swing of 39°F / from 33°F in January to 72°F in August. Total annual precipitation is 86.9 inches, with June being the wettest month (12.6") and December the driest (2.3").