Greenwater, WA
Full City Profile · Washington · King County County
5.0
/5.0
A+
Excellent
138
Population
95/sq mi density
$112,917
Median Income
$37,895 per capita
42°F
Avg Temperature
A+
Overall
5.0 / 5.0
Strong
A+
Economy
5.0 / 5.0
$112,917 median income, 0.0% unemployment
A+
Education
5.0 / 5.0
58.9% bachelor's degree or higher
Greenwater has a cool climate with an average annual temperature of 42°F (6°C). Winters average 29°F in January while summers reach 59°F in July. Annual precipitation totals 85.0 inches. The area receives 17.5 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
29°F Jan (-2°C)
59°F Jul (15°C)
| Annual Average | 42.4°F |
| 21% below US avg | |
| January Average | 29°F (-2°C) |
| July Average | 59°F (15°C) |
Geography
| Elevation | 1,805 ft (550 m) |
| Area | 0.6 sq mi (1.5 km²) |
| Population Density | 95/sq mi |
| Coordinates | 47.1442°N, 121.6285°W |
| Timezone | America/Los_Angeles |
| County | King County County |
| Nearest Airport | Seattle-Tacoma International (SEA) 38 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
| Good Days % | 69.7% |
| Unhealthy Days | 3 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0367 ppm |
| NO₂ (Nitrogen Dioxide) | 18.2 ppb |
| SO₂ (Sulfur Dioxide) | 0.59 ppb |
| CO (Carbon Monoxide) | 0.27 ppm |
| PM2.5 (Fine Particles) | 6.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 99.7 / 100 |
| Social Vulnerability | 14.8 / 100 |
| Community Resilience | 87.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Earthquake | Very High |
| Wildfire | Relatively Low |
| Flood | Very High |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively High |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively High |
| Coastal Flood | Relatively Moderate |
| Tsunami | Relatively Low |
| Volcano | Relatively High |
| Avalanche | Very High |
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 | 113 km |
| 1894 | PUYALLUP RIVER DELTA, TACOMA, WA | Meteorological | 3.0 m | 2 | 64 km |
| 1949 | PUGET SOUND, WA | Meteorological | 2.4 m | - | 71 km |
| 1949 | PUGET SOUND, WA | Eruption + Earthquake | - | 8 | 75 km |
| 1820 | CAMANO ISLAND, WA | Meteorological | - | - | 116 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
8 volcanoes within 200 km. Closest: Rainier (34 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Rainier | Stratovolcano | 4,392 m (14,409 ft) | 1450 | 34 km |
| Adams | Stratovolcano | 3,742 m (12,277 ft) | 950 | 105 km |
| St. Helens | Stratovolcano | 2,549 m (8,363 ft) | 2008 | 113 km |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 114 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 136 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 145 km |
| Baker | Stratovolcano(es) | 3,285 m (10,778 ft) | 1880 | 182 km |
| Hood | Stratovolcano | 3,426 m (11,240 ft) | 1866 | 197 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-2°C) | 11.7 in | |
| February | 30°F (-1°C) | 7.9 in | |
| March | 35°F (1°C) | 8.8 in | |
| April | 39°F (4°C) | 6.5 in | |
| May | 46°F (8°C) | 4.7 in | |
| June | 52°F (11°C) | 3.3 in | |
| July | 59°F (15°C) | 1.3 in | Driest |
| August | 60°F (16°C) | 1.6 in | Warmest |
| September | 55°F (13°C) | 4.0 in | |
| October | 44°F (6°C) | 9.0 in | |
| November | 34°F (1°C) | 13.7 in | Wettest |
| December | 28°F (-2°C) | 12.6 in | Coldest |
Greenwater has a seasonal temperature swing of 32°F / from 28°F in December to 60°F in August. Total annual precipitation is 85.0 inches, with November being the wettest month (13.7") and July the driest (1.3").