Summerville, OR
Full City Profile · Oregon · Umatilla County County
4.1
/5.0
A
Great
119
Population
458/sq mi density
$118,611
Median Income
$43,823 per capita
$250,000
Home Value
$571,966 Zillow
48°F
Avg Temperature
A
Overall
4.1 / 5.0
Strong
B+
Economy
3.8 / 5.0
$118,611 median income, 10.9% unemployment
A+
Affordability
5.0 / 5.0
$250,000 home value, /mo rent
B+
Education
3.5 / 5.0
31.3% bachelor's degree or higher
Summerville experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 32°F in January while summers reach 67°F in July. Annual precipitation totals 25.9 inches. The area receives 9.4 inches of snow annually. Air quality is rated Good with a median AQI of 38.
Temperature
32°F Jan (0°C)
67°F Jul (19°C)
| Annual Average | 48.1°F |
| 11% below US avg | |
| January Average | 32°F (0°C) |
| July Average | 67°F (19°C) |
Geography
| Elevation | 2,712 ft (827 m) |
| Area | 0.1 sq mi (0.3 km²) |
| Population Density | 458/sq mi |
| Coordinates | 45.4897°N, 118.0041°W |
| Timezone | America/Los_Angeles |
| County | Umatilla County County |
| Nearest Airport | Eastern Oregon Regional At Pendleton (PDT) 41 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
| Good Days % | 74.3% |
| Unhealthy Days | 4 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0475 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 82.3 / 100 |
| Social Vulnerability | 59.6 / 100 |
| Community Resilience | 15.9 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | Relatively Moderate |
| Cold Wave | Relatively High |
| Landslide | Relatively Moderate |
| Volcano | Very Low |
| Avalanche | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 3.3 in | |
| February | 35°F (2°C) | 2.3 in | |
| March | 41°F (5°C) | 2.3 in | |
| April | 46°F (8°C) | 2.4 in | |
| May | 54°F (12°C) | 2.4 in | |
| June | 60°F (16°C) | 1.8 in | |
| July | 67°F (19°C) | 0.7 in | Warmest |
| August | 66°F (19°C) | 0.7 in | Driest |
| September | 59°F (15°C) | 1.0 in | |
| October | 48°F (9°C) | 2.2 in | |
| November | 38°F (3°C) | 3.2 in | |
| December | 31°F (-0°C) | 3.8 in | Coldest, Wettest |
Summerville has a seasonal temperature swing of 36°F / from 31°F in December to 67°F in July. Total annual precipitation is 26.0 inches, with December being the wettest month (3.8") and August the driest (0.7").