Cosmopolis, WA
Full City Profile · Washington · Pacific County County
3.7
/5.0
B+
Good
2,301
Population
1,655/sq mi density
$80,132
Median Income
$32,341 per capita
$280,700
Home Value
$326,556 Zillow
$913
Median Rent
30.4% income on rent
51°F
Avg Temperature
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.5 / 5.0
$80,132 median income, 9.6% unemployment
A+
Affordability
4.7 / 5.0
$280,700 home value, $913/mo rent
C+
Education
2.8 / 5.0
21.9% bachelor's degree or higher
Cosmopolis experiences four distinct seasons with an average annual temperature of 51°F (11°C). Winters average 43°F in January while summers reach 60°F in July. Annual precipitation totals 68.8 inches. The area receives 0.5 inches of snow annually. Air quality is rated Good with a median AQI of 16.
Temperature
43°F Jan (6°C)
60°F Jul (16°C)
| Annual Average | 51.0°F |
| 6% below US avg | |
| January Average | 43°F (6°C) |
| July Average | 60°F (16°C) |
Geography
| Elevation | 24 ft (7 m) |
| Area | 0.6 sq mi (1.6 km²) |
| Population Density | 1,655/sq mi |
| Coordinates | 46.9543°N, 123.7729°W |
| Timezone | America/Los_Angeles |
| County | Pacific County County |
| Nearest Airport | Olympia Regional (OLM) 41 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 16.0 |
| Rating | Good |
| Good Days % | 99.7% |
| Unhealthy Days | 0 |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 92.8 / 100 |
| Social Vulnerability | 64.4 / 100 |
| Community Resilience | 69.6 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Moderate |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Coastal Flood | Relatively Moderate |
| Tsunami | Very High |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
5 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 | 148 km |
| 1894 | PUYALLUP RIVER DELTA, TACOMA, WA | Meteorological | 3.0 m | 2 | 107 km |
| 1891 | WASHINGTON | Eruption + Earthquake | 2.4 m | - | 118 km |
| 1949 | PUGET SOUND, WA | Meteorological | 2.4 m | - | 101 km |
| 1949 | PUGET SOUND, WA | Eruption + Earthquake | - | 8 | 91 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
5 volcanoes within 200 km. Closest: St. Helens (148 km).
| Name | Type | Elevation | Last Eruption | Distance |
| St. Helens | Stratovolcano | 2,549 m (8,363 ft) | 2008 | 148 km |
| Rainier | Stratovolcano | 4,392 m (14,409 ft) | 1450 | 153 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 176 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 188 km |
| Adams | Stratovolcano | 3,742 m (12,277 ft) | 950 | 193 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 10.9 in | |
| February | 44°F (6°C) | 6.7 in | |
| March | 46°F (8°C) | 7.7 in | |
| April | 49°F (9°C) | 5.4 in | |
| May | 53°F (12°C) | 3.0 in | |
| June | 57°F (14°C) | 2.0 in | |
| July | 60°F (16°C) | 0.9 in | Driest |
| August | 61°F (16°C) | 1.4 in | Warmest |
| September | 59°F (15°C) | 2.5 in | |
| October | 53°F (11°C) | 6.9 in | |
| November | 46°F (8°C) | 11.0 in | Wettest |
| December | 42°F (6°C) | 10.5 in | Coldest |
Cosmopolis has a seasonal temperature swing of 19°F / from 42°F in December to 61°F in August. Total annual precipitation is 68.8 inches, with November being the wettest month (11.0") and July the driest (0.9").