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Knappa, OR
Full City Profile · Oregon · Wahkiakum County County
2.9
/5.0
C+
Fair
922
Population
445/sq mi density
$85,357
Median Income
$35,258 per capita
$409,700
Home Value
$466,664 Zillow
$986
Median Rent
30.7% income on rent
52°F
Avg Temperature
253 sunny days/yr
262
Violent Crime/100K
3,947 property/100K
C+
Overall
2.9 / 5.0
Fair overall score based on economy, affordability, safety and education
A+
Economy
4.7 / 5.0
$85,357 median income, 1.5% unemployment
B+
Affordability
4.0 / 5.0
$409,700 home value, $986/mo rent
F
Safety
1.0 / 5.0
262 violent crimes/100K
D
Education
1.9 / 5.0
11.7% bachelor's degree or higher
Knappa experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 43°F in January while summers reach 62°F in July. The area gets 253 sunny days per year. Air quality is rated Good with a median AQI of 32.
Temperature
43°F Jan (6°C)
62°F Jul (16°C)
| Annual Average | 51.8°F |
| 4% below US avg | |
| January Average | 43°F (6°C) |
| July Average | 62°F (16°C) |
| Sunny Days | 253 days/yr |
Geography
| Elevation | 106 ft (32 m) |
| Area | 2.1 sq mi (5.5 km²) |
| Population Density | 445/sq mi |
| Coordinates | 46.1708°N, 123.5798°W |
| Timezone | America/Los_Angeles |
| County | Wahkiakum County County |
| Nearest Airport | Astoria Regional (AST) 15 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 32.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 19.3 / 100 |
| Social Vulnerability | 60.8 / 100 |
| Community Resilience | 40.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Very Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Coastal Flood | Relatively Moderate |
| Tsunami | Relatively Low |
| Volcano | Very 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: 250.0 m (820 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1980 | WASHINGTON | Explosion | 250.0 m | 61 | 108 km |
| 1949 | PUGET SOUND, WA | Meteorological | 2.4 m | — | 149 km |
| 1949 | PUGET SOUND, WA | Eruption + Earthquake | — | 8 | 133 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
6 volcanoes within 200 km. Closest: St. Helens (108 km).
| Name | Type | Elevation | Last Eruption | Distance |
| St. Helens | Stratovolcano | 2,549 m (8,363 ft) | 2008 | 108 km |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 120 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 138 km |
| Rainier | Stratovolcano | 4,392 m (14,409 ft) | 1450 | 159 km |
| Adams | Stratovolcano | 3,742 m (12,277 ft) | 950 | 161 km |
| Hood | Stratovolcano | 3,426 m (11,240 ft) | 1866 | 171 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 43°F (6°C) | 13.6 in | |
| February | 43°F (6°C) | 10.8 in | |
| March | 45°F (7°C) | 9.7 in | |
| April | 48°F (9°C) | 6.4 in | |
| May | 53°F (12°C) | 4.2 in | |
| June | 57°F (14°C) | 3.0 in | |
| July | 62°F (16°C) | 1.6 in | Warmest, Driest |
| August | 61°F (16°C) | 2.0 in | |
| September | 59°F (15°C) | 3.9 in | |
| October | 52°F (11°C) | 7.7 in | |
| November | 45°F (7°C) | 13.5 in | |
| December | 41°F (5°C) | 14.4 in | Coldest, Wettest |
Knappa has a seasonal temperature swing of 21°F / from 41°F in December to 62°F in July. Total annual precipitation is 90.8 inches, with December being the wettest month (14.4") and July the driest (1.6").