Sudden Valley, WA
Full City Profile · Washington · Island County County
4.7
/5.0
A+
Excellent
6,963
Population
1,627/sq mi density
$98,865
Median Income
$47,627 per capita
$450,500
Home Value
$658,167 Zillow
$1,930
Median Rent
36.6% income on rent
51°F
Avg Temperature
A+
Overall
4.7 / 5.0
Strong
A+
Economy
4.9 / 5.0
$98,865 median income, 2.5% unemployment
A
Affordability
4.1 / 5.0
$450,500 home value, $1,930/mo rent
A+
Education
5.0 / 5.0
49.8% bachelor's degree or higher
Sudden Valley experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 40°F in January while summers reach 64°F in July. Annual precipitation totals 34.7 inches. The area receives 3.4 inches of snow annually.
Temperature
40°F Jan (5°C)
64°F Jul (18°C)
| Annual Average | 51.2°F |
| 5% below US avg | |
| January Average | 40°F (5°C) |
| July Average | 64°F (18°C) |
Geography
| Elevation | 749 ft (228 m) |
| Area | 3.1 sq mi (8.1 km²) |
| Population Density | 1,627/sq mi |
| Coordinates | 48.7231°N, 122.3441°W |
| Timezone | America/Los_Angeles |
| County | Island County County |
| Nearest Airport | Bellingham International (BLI) 10 miles away |
Precipitation & Snow
Air Quality
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 78.0 / 100 |
| Social Vulnerability | 36.8 / 100 |
| Community Resilience | 80.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Moderate |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Relatively High |
| Coastal Flood | Relatively Moderate |
| Tsunami | Very Low |
| Volcano | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
3 tsunamis recorded within 500 km. Highest wave on record: 38.0 m (125 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2007 | CHEHALIS LAKE, CHILLIWACK | Meteorological | 38.0 m | - | 86 km |
| 1891 | WASHINGTON | Eruption + Earthquake | 2.4 m | - | 117 km |
| 1820 | CAMANO ISLAND, WA | Meteorological | - | - | 74 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Baker (39 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 39 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 114 km |
| Garibaldi | Stratovolcano | 2,678 m (8,786 ft) | -8060 | 134 km |
| Garibaldi Lake | Volcanic field | 2,316 m (7,598 ft) | Unknown | 143 km |
| Cayley Volcanic Field | Volcanic field | 2,375 m (7,792 ft) | Unknown | 169 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (5°C) | 4.5 in | |
| February | 42°F (5°C) | 2.9 in | |
| March | 45°F (7°C) | 3.4 in | |
| April | 50°F (10°C) | 2.8 in | |
| May | 56°F (13°C) | 2.2 in | |
| June | 60°F (15°C) | 1.6 in | |
| July | 64°F (18°C) | 0.9 in | Warmest, Driest |
| August | 64°F (18°C) | 1.1 in | |
| September | 59°F (15°C) | 2.0 in | |
| October | 51°F (11°C) | 3.9 in | |
| November | 45°F (7°C) | 5.2 in | Wettest |
| December | 40°F (4°C) | 4.3 in | Coldest |
Sudden Valley has a seasonal temperature swing of 24°F / from 40°F in December to 64°F in July. Total annual precipitation is 34.7 inches, with November being the wettest month (5.2") and July the driest (0.9").