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Chōnan, Japan
Full City Profile
4.2
/5.0
A
Great
7,743
Population
243/sq mi density
135 ft
Elevation
41 meters
63°F
Avg Temperature
17°C
A
Overall
4.2 / 5.0
Strong
B
Economy
3.3 / 5.0
$35,400 median income, 2.5% unemployment
A+
Affordability
5.0 / 5.0
$102,000 home value, $510/mo rent
Chōnan enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 42°F in January while summers reach 82°F in July. The area gets 283 sunny days per year. Annual precipitation totals 50.3 inches. The area receives 0.5 inches of snow annually.
Temperature
42°F Jan (6°C)
82°F Jul (28°C)
| Annual Average | 63.1°F |
| 17% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 283 days/yr |
Geography
| Elevation | 135 ft (41 m) |
| Area | 31.9 sq mi (82.6 km²) |
| Population Density | 243/sq mi |
| Coordinates | 35.3970°N, 140.2350°W |
| Timezone | Asia/Tokyo |
Precipitation & Snow
Air Quality
Tsunami History
20 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 | 75 km |
| 1703 | OFF SW BOSO PENINSULA | Earthquake | 11.7 m | 5,233 | 87 km |
| 1677 | OFF SE. BOSO PENINSULA | Earthquake | 8.0 m | 500 | 123 km |
| 1495 | KAMAKURA, SAGAMI BAY, TOKAIDO | Earthquake | 5.0 m | 200 | 75 km |
| 1732 | KUJUKURI BEACH, JAPAN | Earthquake | 2.0 m | — | 56 km |
| 1670 | BOSO, JAPAN | Earthquake | 2.0 m | — | 70 km |
| 1433 | OFF IZU-OSHIMA | Earthquake | 2.0 m | — | 87 km |
| 1980 | HONSHU ISLAND | Earthquake | 0.6 m | — | 116 km |
| 1923 | KASHIMA, JAPAN | Earthquake | 0.4 m | — | 142 km |
| 1978 | TOKAIDO | Earthquake | 0.4 m | 25 | 110 km |
| 1923 | RYUKYU ISLANDS | Earthquake | 0.3 m | — | 55 km |
| 1896 | KASHIMA, JAPAN | Earthquake | 0.3 m | — | 141 km |
| 1990 | JAPAN | Earthquake | 0.2 m | — | 118 km |
| 2000 | HONSHU: S COAST | Earthquake | 0.1 m | — | 149 km |
| 1855 | TOKAIDO | Earthquake | — | 6,757 | 48 km |
| 1782 | ODAWARA, SAGAMI BAY | Eruption + Earthquake | — | — | 59 km |
| 1642 | BOSO, JAPAN | Earthquake | — | — | 40 km |
| 1633 | SAGAMI BAY | Earthquake | — | 150 | 97 km |
| 1602 | BOSO, JAPAN | Eruption + Earthquake | — | — | 41 km |
| 1257 | SAGAMI BAY, JAPAN | Earthquake | — | — | 70 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
15 volcanoes within 200 km. Closest: Izu-Oshima (107 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Izu-Oshima | Stratovolcano | 758 m (2,487 ft) | 1990 | 107 km |
| Hakoneyama | Complex | 1,438 m (4,718 ft) | 2015 | 112 km |
| Izu-Tobu | Pyroclastic cone(s) | 1,406 m (4,613 ft) | 1989 | 117 km |
| Toshima | Stratovolcano | 508 m (1,667 ft) | -4550 | 131 km |
| Fujisan | Stratovolcano | 3,776 m (12,388 ft) | 1708 | 137 km |
| Niijima | Lava dome(s) | 432 m (1,417 ft) | 886 | 142 km |
| Miyakejima | Stratovolcano | 775 m (2,543 ft) | 2010 | 159 km |
| Akagisan | Stratovolcano | 1,828 m (5,997 ft) | Unknown | 160 km |
| Kozushima | Lava dome(s) | 572 m (1,877 ft) | 838 | 164 km |
| Nantaisan | Stratovolcano | 2,486 m (8,156 ft) | -9540 | 166 km |
| Omanago Group | Lava dome(s) | 2,341 m (7,680 ft) | -3050 | 169 km |
| Takaharayama | Stratovolcano | 1,795 m (5,889 ft) | -4570 | 172 km |
| Harunasan | Stratovolcano | 1,449 m (4,754 ft) | 550 | 173 km |
| Nikko-Shiranesan | Shield | 2,578 m (8,458 ft) | 1952 | 174 km |
| Mikurajima | Stratovolcano | 851 m (2,792 ft) | -4100 | 179 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 2.4 in | |
| February | 41°F (5°C) | 3.3 in | Coldest |
| March | 47°F (8°C) | 5.0 in | |
| April | 56°F (14°C) | 5.2 in | |
| May | 64°F (18°C) | 5.3 in | |
| June | 69°F (21°C) | 7.1 in | |
| July | 82°F (28°C) | 4.8 in | Warmest |
| August | 79°F (26°C) | 5.4 in | |
| September | 73°F (23°C) | 8.0 in | |
| October | 64°F (18°C) | 8.0 in | Wettest |
| November | 54°F (12°C) | 4.6 in | |
| December | 45°F (7°C) | 2.4 in | Driest |
Chōnan has a seasonal temperature swing of 40°F / from 41°F in February to 82°F in July. Total annual precipitation is 61.5 inches, with October being the wettest month (8.0") and December the driest (2.4").