Annex, OR
Full City Profile · Oregon · Washington County County
3.3
/5.0
B
Good
304
Population
124/sq mi density
$49,792
Median Income
$25,659 per capita
$175,000
Home Value
$301,495 Zillow
$1,229
Median Rent
36.1% income on rent
52°F
Avg Temperature
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B
Economy
3.2 / 5.0
$49,792 median income, 3.4% unemployment
A+
Affordability
4.7 / 5.0
$175,000 home value, $1,229/mo rent
D
Education
1.9 / 5.0
10.7% bachelor's degree or higher
Annex experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 29°F in January while summers reach 78°F in July. Annual precipitation totals 13.4 inches. The area receives 15.4 inches of snow annually. Air quality is rated Good with a median AQI of 33.
Temperature
29°F Jan (-1°C)
78°F Jul (25°C)
| Annual Average | 52.3°F |
| 3% below US avg | |
| January Average | 29°F (-1°C) |
| July Average | 78°F (25°C) |
Geography
| Elevation | 2,106 ft (642 m) |
| Area | 1.0 sq mi (2.5 km²) |
| Population Density | 124/sq mi |
| Coordinates | 44.2342°N, 116.9924°W |
| Timezone | America/Los_Angeles |
| County | Washington County County |
| Nearest Airport | Boise Air Trml/Gowen Field (BOI) 60 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 33.0 |
| Rating | Good |
| Good Days % | 84.4% |
| Unhealthy Days | 2 |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 30.3 / 100 |
| Social Vulnerability | 70.0 / 100 |
| Community Resilience | 7.0 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Earthquake | Very Low |
| Wildfire | Relatively Moderate |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Relatively Low |
| Lightning | Very Low |
| Ice Storm | Very Low |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Low |
| Volcano | Very Low |
| Avalanche | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Nearby Volcanoes
2 volcanoes within 200 km. Closest: Jordan Craters (127 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Jordan Craters | Volcanic field | 1,473 m (4,833 ft) | -1250 | 127 km |
| Diamond Craters | Volcanic field | 1,435 m (4,708 ft) | -5610 | 189 km |
Source: Smithsonian Institution Global Volcanism Program (GVP). Sorted by distance.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 29°F (-1°C) | 2.0 in | Coldest |
| February | 35°F (2°C) | 1.3 in | |
| March | 45°F (7°C) | 1.2 in | |
| April | 51°F (11°C) | 1.1 in | |
| May | 61°F (16°C) | 1.3 in | |
| June | 69°F (20°C) | 1.0 in | |
| July | 78°F (25°C) | 0.4 in | Warmest |
| August | 75°F (24°C) | 0.3 in | Driest |
| September | 65°F (18°C) | 0.4 in | |
| October | 51°F (11°C) | 0.8 in | |
| November | 38°F (3°C) | 1.3 in | |
| December | 30°F (-1°C) | 2.4 in | Wettest |
Annex has a seasonal temperature swing of 48°F / from 29°F in January to 78°F in July. Total annual precipitation is 13.5 inches, with December being the wettest month (2.4") and August the driest (0.3").