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Fern Prairie, WA
Full City Profile · Washington · Multnomah County County
3.4
/5.0
B
Good
2,132
Population
425/sq mi density
$110,476
Median Income
$40,247 per capita
$550,000
Home Value
$745,684 Zillow
$1,482
Median Rent
23.8% income on rent
53°F
Avg Temperature
251 sunny days/yr
75
Violent Crime/100K
1,387 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$110,476 median income, 1.7% unemployment
B+
Affordability
3.9 / 5.0
$550,000 home value, $1,482/mo rent
F
Safety
1.0 / 5.0
75 violent crimes/100K
B+
Education
3.9 / 5.0
36.1% bachelor's degree or higher
Fern Prairie experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 40°F in January while summers reach 68°F in July. The area gets 251 sunny days per year. Annual precipitation totals 48.4 inches. Air quality is rated Good with a median AQI of 28.
Temperature
40°F Jan (4°C)
68°F Jul (20°C)
| Annual Average | 53.4°F |
| 1% below US avg | |
| January Average | 40°F (4°C) |
| July Average | 68°F (20°C) |
| Sunny Days | 251 days/yr |
Geography
| Elevation | 482 ft (147 m) |
| Area | 1.9 sq mi (5.0 km²) |
| Population Density | 425/sq mi |
| Coordinates | 45.6370°N, 122.3963°W |
| Timezone | America/Los_Angeles |
| County | Multnomah County County |
| Nearest Airport | Portland International (PDX) 10 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 28.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0329 ppm |
| NO₂ (Nitrogen Dioxide) | 9.5 ppb |
| SO₂ (Sulfur Dioxide) | 0.44 ppb |
| CO (Carbon Monoxide) | 0.16 ppm |
| PM2.5 (Fine Particles) | 6.0 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.5 / 100 |
| Social Vulnerability | 29.8 / 100 |
| Community Resilience | 95.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Earthquake | Relatively High |
| Wildfire | Relatively Low |
| Flood | Relatively High |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively High |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively High |
| Landslide | Relatively Moderate |
| Coastal Flood | Relatively Low |
| Volcano | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami 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 | 65 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Nearby Volcanoes
11 volcanoes within 200 km. Closest: West Crater (37 km).
| Name | Type | Elevation | Last Eruption | Distance |
| West Crater | Volcanic field | 1,329 m (4,360 ft) | -5750 | 37 km |
| Indian Heaven | Shield(s) | 1,806 m (5,925 ft) | -6250 | 55 km |
| Hood | Stratovolcano | 3,426 m (11,240 ft) | 1866 | 62 km |
| St. Helens | Stratovolcano | 2,549 m (8,363 ft) | 2008 | 65 km |
| Adams | Stratovolcano | 3,742 m (12,277 ft) | 950 | 94 km |
| Jefferson | Stratovolcano | 3,199 m (10,495 ft) | 950 | 117 km |
| Rainier | Stratovolcano | 4,392 m (14,409 ft) | 1450 | 144 km |
| Sand Mountain Field | Pyroclastic cone(s) | 1,664 m (5,459 ft) | -950 | 145 km |
| Belknap | Shield(s) | 2,095 m (6,873 ft) | 480 | 157 km |
| Three Sisters | Complex | 3,159 m (10,364 ft) | 440 | 174 km |
| Bachelor | Stratovolcano | 2,763 m (9,065 ft) | -5800 | 193 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 8.3 in | Coldest |
| February | 43°F (6°C) | 6.6 in | |
| March | 47°F (8°C) | 5.9 in | |
| April | 51°F (10°C) | 4.5 in | |
| May | 56°F (14°C) | 3.5 in | |
| June | 62°F (17°C) | 2.4 in | |
| July | 68°F (20°C) | 1.0 in | Warmest, Driest |
| August | 67°F (20°C) | 1.3 in | |
| September | 62°F (17°C) | 2.6 in | |
| October | 54°F (12°C) | 4.5 in | |
| November | 45°F (7°C) | 8.5 in | |
| December | 40°F (5°C) | 8.9 in | Wettest |
Fern Prairie has a seasonal temperature swing of 28°F / from 40°F in January to 68°F in July. Total annual precipitation is 58.1 inches, with December being the wettest month (8.9") and July the driest (1.0").