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Anderson Island, WA
Full City Profile · Washington · Pierce County County
2.7
/5.0
C+
Fair
1,341
Population
169/sq mi density
$72,074
Median Income
$84,859 per capita
$477,600
Home Value
$550,256 Zillow
52°F
Avg Temperature
240 sunny days/yr
52
Violent Crime/100K
503 property/100K
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
B
Economy
3.2 / 5.0
$72,074 median income, 0.0% unemployment
C+
Affordability
2.9 / 5.0
$477,600 home value, /mo rent
F
Safety
1.0 / 5.0
52 violent crimes/100K
B+
Education
3.8 / 5.0
34.5% bachelor's degree or higher
Anderson Island experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 41°F in January while summers reach 65°F in July. The area gets 240 sunny days per year. Annual precipitation totals 42.0 inches. Air quality is rated Good with a median AQI of 28.
Temperature
41°F Jan (5°C)
65°F Jul (18°C)
| Annual Average | 51.9°F |
| 4% below US avg | |
| January Average | 41°F (5°C) |
| July Average | 65°F (18°C) |
| Sunny Days | 240 days/yr |
Geography
| Elevation | 197 ft (60 m) |
| Area | 3.0 sq mi (7.7 km²) |
| Population Density | 169/sq mi |
| Coordinates | 47.1499°N, 122.6817°W |
| Timezone | America/Los_Angeles |
| County | Pierce County County |
| Nearest Airport | Olympia Regional (OLM) 16 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 28.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0412 ppm |
| NO₂ (Nitrogen Dioxide) | 17.9 ppb |
| PM2.5 (Fine Particles) | 6.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.5 / 100 |
| Social Vulnerability | 14.4 / 100 |
| Community Resilience | 60.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Relatively High |
| Wildfire | Relatively Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively High |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Moderate |
| Coastal Flood | Relatively Moderate |
| Tsunami | Relatively Low |
| Volcano | Relatively High |
| Avalanche | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
6 tsunamis recorded within 500 km. Highest wave on record: 250.0 m (820 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1980 | WASHINGTON | Explosion | 250.0 m | 61 | 112 km |
| 1894 | PUYALLUP RIVER DELTA, TACOMA, WA | Meteorological | 3.0 m | 2 | 23 km |
| 1891 | WASHINGTON | Eruption + Earthquake | 2.4 m | — | 113 km |
| 1949 | PUGET SOUND, WA | Meteorological | 2.4 m | — | 20 km |
| 1949 | PUGET SOUND, WA | Eruption + Earthquake | — | 8 | 5 km |
| 1820 | CAMANO ISLAND, WA | Meteorological | — | — | 104 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
7 volcanoes within 200 km. Closest: Rainier (77 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Rainier | Stratovolcano | 4,392 m (14,409 ft) | 1450 | 77 km |
| St. Helens | Stratovolcano | 2,549 m (8,363 ft) | 2008 | 112 km |
| Adams | Stratovolcano | 3,742 m (12,277 ft) | 950 | 139 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 149 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 151 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 159 km |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 192 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 41°F (5°C) | 7.2 in | |
| February | 42°F (5°C) | 5.8 in | |
| March | 45°F (7°C) | 5.0 in | |
| April | 49°F (9°C) | 3.5 in | |
| May | 54°F (12°C) | 2.2 in | |
| June | 59°F (15°C) | 1.7 in | |
| July | 65°F (18°C) | 0.8 in | Warmest, Driest |
| August | 64°F (18°C) | 1.1 in | |
| September | 60°F (15°C) | 2.0 in | |
| October | 52°F (11°C) | 3.9 in | |
| November | 44°F (7°C) | 7.6 in | |
| December | 39°F (4°C) | 7.6 in | Coldest, Wettest |
Anderson Island has a seasonal temperature swing of 25°F / from 39°F in December to 65°F in July. Total annual precipitation is 48.6 inches, with December being the wettest month (7.6") and July the driest (0.8").