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Iwatsuki, Japan
Full City Profile
4.2
/5.0
A
Great
108,833
Population
1,145/sq mi density
30 ft
Elevation
9 meters
62°F
Avg Temperature
17°C
A
Overall
4.2 / 5.0
Strong
B
Economy
3.3 / 5.0
$36,200 median income, 2.5% unemployment
A+
Affordability
5.0 / 5.0
$106,000 home value, $530/mo rent
Iwatsuki enjoys a temperate climate with an average annual temperature of 62°F (17°C). Winters average 39°F in January while summers reach 84°F in July. The area gets 293 sunny days per year. Annual precipitation totals 51.6 inches. The area receives 5.4 inches of snow annually.
Temperature
39°F Jan (4°C)
84°F Jul (29°C)
| Annual Average | 62.2°F |
| 15% above US avg | |
| January Average | 39°F (4°C) |
| July Average | 84°F (29°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 30 ft (9 m) |
| Area | 95.0 sq mi (246.1 km²) |
| Population Density | 1,145/sq mi |
| Coordinates | 35.9647°N, 139.6964°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Tsunami History
19 tsunamis recorded within 500 km. Highest wave on record: 13.0 m (43 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1923 | SAGAMI BAY | Earthquake | 13.0 m | 105,385 | 98 km |
| 1703 | OFF SW BOSO PENINSULA | Earthquake | 11.7 m | 5,233 | 141 km |
| 1495 | KAMAKURA, SAGAMI BAY, TOKAIDO | Earthquake | 5.0 m | 200 | 98 km |
| 1732 | KUJUKURI BEACH, JAPAN | Earthquake | 2.0 m | — | 131 km |
| 1670 | BOSO, JAPAN | Earthquake | 2.0 m | — | 129 km |
| 1433 | OFF IZU-OSHIMA | Earthquake | 2.0 m | — | 120 km |
| 1980 | HONSHU ISLAND | Earthquake | 0.6 m | — | 137 km |
| 1978 | TOKAIDO | Earthquake | 0.4 m | 25 | 135 km |
| 1923 | RYUKYU ISLANDS | Earthquake | 0.3 m | — | 127 km |
| 1896 | KASHIMA, JAPAN | Earthquake | 0.3 m | — | 131 km |
| 1990 | JAPAN | Earthquake | 0.2 m | — | 146 km |
| 1855 | TOKAIDO | Earthquake | — | 6,757 | 36 km |
| 1782 | ODAWARA, SAGAMI BAY | Eruption + Earthquake | — | — | 96 km |
| 1642 | BOSO, JAPAN | Earthquake | — | — | 118 km |
| 1633 | SAGAMI BAY | Earthquake | — | 150 | 96 km |
| 1602 | BOSO, JAPAN | Eruption + Earthquake | — | — | 121 km |
| 1257 | SAGAMI BAY, JAPAN | Earthquake | — | — | 87 km |
| 1241 | KAMAKURA, SAGAMI BAY | Earthquake | — | — | 89 km |
| 818 | TOKAIDO | Eruption + Earthquake | — | — | 92 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Akagisan (80 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 80 km |
| Nantaisan | Stratovolcano | 2,486 m (8,156 ft) | -9540 | 91 km |
| Omanago Group | Lava dome(s) | 2,341 m (7,680 ft) | -3050 | 94 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 95 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 97 km |
| Hakoneyama | Complex | 1,438 m (4,718 ft) | 2015 | 102 km |
| Takaharayama | Stratovolcano | 1,795 m (5,889 ft) | -4570 | 104 km |
| Fujisan | Stratovolcano | 3,776 m (12,388 ft) | 1708 | 110 km |
| Hiuchigatake | Stratovolcano | 2,356 m (7,730 ft) | 1544 | 116 km |
| Asamayama | Complex | 2,568 m (8,425 ft) | 2019 | 116 km |
| Yokodake | Stratovolcano(es) | 2,480 m (8,136 ft) | 1200 | 125 km |
| Kusatsu-Shiranesan | Stratovolcano(es) | 2,165 m (7,103 ft) | 2018 | 127 km |
| Izu-Tobu | Pyroclastic cone(s) | 1,406 m (4,613 ft) | 1989 | 130 km |
| Nasudake | Stratovolcano(es) | 1,915 m (6,283 ft) | 1963 | 131 km |
| Shiga | Shield(s) | 2,041 m (6,696 ft) | Unknown | 133 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 1.4 in | Coldest, Driest |
| February | 41°F (5°C) | 2.1 in | |
| March | 46°F (8°C) | 3.4 in | |
| April | 57°F (14°C) | 4.3 in | |
| May | 65°F (18°C) | 4.8 in | |
| June | 71°F (21°C) | 6.5 in | |
| July | 84°F (29°C) | 6.0 in | Warmest |
| August | 80°F (27°C) | 6.1 in | |
| September | 73°F (23°C) | 7.7 in | Wettest |
| October | 63°F (17°C) | 6.3 in | |
| November | 53°F (12°C) | 3.0 in | |
| December | 44°F (7°C) | 1.4 in |
Iwatsuki has a seasonal temperature swing of 45°F / from 39°F in January to 84°F in July. Total annual precipitation is 53.1 inches, with September being the wettest month (7.7") and January the driest (1.4").