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Custer, WA
Full City Profile · Washington · Island County County
3.3
/5.0
B
Good
266
Population
119/sq mi density
$130,179
Median Income
$48,213 per capita
$540,400
Home Value
$645,640 Zillow
51°F
Avg Temperature
233 sunny days/yr
215
Violent Crime/100K
2,888 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.8 / 5.0
$130,179 median income, 17.9% unemployment
A
Affordability
4.3 / 5.0
$540,400 home value, /mo rent
F
Safety
1.0 / 5.0
215 violent crimes/100K
A
Education
4.2 / 5.0
40.2% bachelor's degree or higher
Custer experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 39°F in January while summers reach 64°F in July. The area gets 233 sunny days per year. Annual precipitation totals 41.8 inches. The area receives 9.3 inches of snow annually. Air quality is rated Good with a median AQI of 28.
Temperature
39°F Jan (4°C)
64°F Jul (18°C)
| Annual Average | 50.9°F |
| 6% below US avg | |
| January Average | 39°F (4°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 233 days/yr |
Geography
| Elevation | 39 ft (12 m) |
| Area | 0.7 sq mi (1.8 km²) |
| Population Density | 119/sq mi |
| Coordinates | 48.9129°N, 122.6370°W |
| Timezone | America/Los_Angeles |
| County | Island County County |
| Nearest Airport | Bellingham International (BLI) 9 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 28.0 |
| Rating | Good |
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 | — | 77 km |
| 1891 | WASHINGTON | Eruption + Earthquake | 2.4 m | — | 120 km |
| 1820 | CAMANO ISLAND, WA | Meteorological | — | — | 97 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: Baker (62 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 62 km |
| Garibaldi | Stratovolcano | 2,678 m (8,786 ft) | -8060 | 108 km |
| Garibaldi Lake | Volcanic field | 2,316 m (7,598 ft) | Unknown | 116 km |
| Cayley Volcanic Field | Volcanic field | 2,375 m (7,792 ft) | Unknown | 142 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 143 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 39°F (4°C) | 6.3 in | |
| February | 41°F (5°C) | 4.7 in | |
| March | 44°F (7°C) | 4.2 in | |
| April | 49°F (9°C) | 3.8 in | |
| May | 54°F (12°C) | 3.1 in | |
| June | 59°F (15°C) | 2.6 in | |
| July | 64°F (18°C) | 1.7 in | Warmest, Driest |
| August | 64°F (18°C) | 1.7 in | |
| September | 59°F (15°C) | 2.4 in | |
| October | 51°F (10°C) | 4.5 in | |
| November | 43°F (6°C) | 7.4 in | Wettest |
| December | 37°F (3°C) | 6.4 in | Coldest |
Custer has a seasonal temperature swing of 27°F / from 37°F in December to 64°F in July. Total annual precipitation is 48.8 inches, with November being the wettest month (7.4") and July the driest (1.7").