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Coulee Dam, WA
Full City Profile · Washington · Lincoln County County
3.7
/5.0
B+
Good
1,457
Population
2,024/sq mi density
$67,868
Median Income
$44,658 per capita
$212,900
Home Value
$237,661 Zillow
$952
Median Rent
21.0% income on rent
50°F
Avg Temperature
273 sunny days/yr
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.9 / 5.0
$67,868 median income, 4.2% unemployment
A+
Affordability
4.9 / 5.0
$212,900 home value, $952/mo rent
C+
Safety
2.5 / 5.0
0 violent crimes/100K
B+
Education
3.6 / 5.0
31.9% bachelor's degree or higher
Coulee Dam experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 28°F in January while summers reach 74°F in July. The area gets 273 sunny days per year. Annual precipitation totals 11.1 inches. Air quality is rated Good with a median AQI of 28.
Temperature
28°F Jan (-2°C)
74°F Jul (23°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 28°F (-2°C) |
| July Average | 74°F (23°C) |
| Sunny Days | 273 days/yr |
Geography
| Elevation | 1,149 ft (350 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 2,024/sq mi |
| Coordinates | 47.9685°N, 118.9763°W |
| Timezone | America/Los_Angeles |
| County | Lincoln County County |
| Nearest Airport | Grant County International (MWH) 55 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 28.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 54.9 / 100 |
| Social Vulnerability | 78.2 / 100 |
| Community Resilience | 59.8 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
9 tsunamis recorded within 500 km. Highest wave on record: 19.8 m (65 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1952 | COLUMBIA RIVER VALLEY, WA | Meteorological | 19.8 m | — | 91 km |
| 1949 | COLUMBIA RIVER VALLEY, WA | Meteorological | 19.8 m | — | 49 km |
| 2024 | COLUMBIA RIVER VALLEY, WA | Meteorological | 14.3 m | — | 91 km |
| 1944 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.1 m | — | 91 km |
| 2009 | COLUMBIA RIVER VALLEY, WA | Meteorological | 9.0 m | — | 73 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | 4.8 m | — | 91 km |
| 2009 | COLUMBIA RIVER VALLEY, WA | Meteorological | 3.6 m | — | 62 km |
| 1953 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 91 km |
| 1952 | COLUMBIA RIVER VALLEY, WA | Meteorological | — | — | 91 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
1 volcano within 200 km. Closest: Glacier Peak (160 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Glacier Peak | Stratovolcano | 3,213 m (10,541 ft) | 1700 | 160 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 28°F (-2°C) | 1.2 in | |
| February | 32°F (0°C) | 1.1 in | |
| March | 40°F (4°C) | 1.1 in | |
| April | 47°F (8°C) | 0.9 in | |
| May | 55°F (13°C) | 1.2 in | |
| June | 62°F (17°C) | 0.9 in | |
| July | 74°F (23°C) | 0.6 in | Warmest |
| August | 69°F (21°C) | 0.6 in | Driest |
| September | 60°F (15°C) | 0.6 in | |
| October | 48°F (9°C) | 0.8 in | |
| November | 36°F (2°C) | 1.7 in | |
| December | 27°F (-3°C) | 1.8 in | Coldest, Wettest |
Coulee Dam has a seasonal temperature swing of 47°F / from 27°F in December to 74°F in July. Total annual precipitation is 12.4 inches, with December being the wettest month (1.8") and August the driest (0.6").