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Iwanai, Japan
Full City Profile
4.1
/5.0
A
Great
13,210
Population
104/sq mi density
20 ft
Elevation
6 meters
43°F
Avg Temperature
6°C
A
Overall
4.1 / 5.0
Strong
B
Economy
3.1 / 5.0
$28,900 median income, 3.0% unemployment
A+
Affordability
5.0 / 5.0
$68,000 home value, $340/mo rent
Iwanai has a cool climate with an average annual temperature of 43°F (6°C). Winters average 20°F in January while summers reach 66°F in July. The area gets 235 sunny days per year. Annual precipitation totals 55.6 inches. The area receives 19.1 inches of snow annually.
Temperature
20°F Jan (-7°C)
66°F Jul (19°C)
| Annual Average | 43.2°F |
| 20% below US avg | |
| January Average | 20°F (-7°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 235 days/yr |
Geography
| Elevation | 20 ft (6 m) |
| Area | 126.6 sq mi (327.8 km²) |
| Population Density | 104/sq mi |
| Coordinates | 42.9744°N, 140.5089°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Tsunami History
6 tsunamis recorded within 500 km. Highest wave on record: 32.0 m (105 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1993 | SEA OF JAPAN | Earthquake | 32.0 m | 231 | 108 km |
| 1640 | SE. HOKKAIDO ISLAND | Explosion | 8.0 m | 700 | 102 km |
| 1947 | W. HOKKAIDO ISLAND | Earthquake | 2.0 m | — | 100 km |
| 1993 | JAPAN | Earthquake | 0.2 m | — | 123 km |
| 1834 | W. HOKKAIDO ISLAND | Earthquake | — | — | 81 km |
| 1792 | W. HOKKAIDO ISLAND | Earthquake | — | — | 59 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
10 volcanoes within 200 km. Closest: Niseko (17 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Niseko | Stratovolcano(es) | 1,308 m (4,291 ft) | -4900 | 17 km |
| Yoteizan | Stratovolcano | 1,888 m (6,194 ft) | -1050 | 30 km |
| Toya | Stratovolcano | 733 m (2,405 ft) | 2001 | 55 km |
| Kuttara | Stratovolcano(es) | 549 m (1,801 ft) | 1820 | 76 km |
| Shikotsu | Caldera | 1,320 m (4,331 ft) | 1979 | 78 km |
| Hokkaido-Komagatake | Stratovolcano | 1,131 m (3,711 ft) | 2000 | 102 km |
| Esan | Lava dome(s) | 618 m (2,028 ft) | 1874 | 141 km |
| Tokachidake | Stratovolcano(es) | 2,077 m (6,814 ft) | 2004 | 183 km |
| Oshima-Oshima | Stratovolcano | 732 m (2,402 ft) | 1790 | 188 km |
| Osorezan | Stratovolcano | 878 m (2,881 ft) | 1787 | 195 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 20°F (-7°C) | 5.8 in | Coldest |
| February | 21°F (-6°C) | 4.3 in | |
| March | 28°F (-2°C) | 3.3 in | |
| April | 39°F (4°C) | 3.0 in | Driest |
| May | 49°F (10°C) | 3.0 in | |
| June | 57°F (14°C) | 3.2 in | |
| July | 66°F (19°C) | 4.5 in | |
| August | 68°F (20°C) | 6.0 in | Warmest, Wettest |
| September | 60°F (15°C) | 6.0 in | |
| October | 48°F (9°C) | 5.1 in | |
| November | 37°F (3°C) | 5.8 in | |
| December | 26°F (-3°C) | 5.8 in |
Iwanai has a seasonal temperature swing of 47°F / from 20°F in January to 68°F in August. Total annual precipitation is 55.6 inches, with August being the wettest month (6.0") and April the driest (3.0").