Birnamwood, WI
Full City Profile · Wisconsin · Marathon County County
3.5
/5.0
B+
Good
688
Population
313/sq mi density
$50,000
Median Income
$31,520 per capita
$134,800
Home Value
$274,823 Zillow
$584
Median Rent
25.0% income on rent
44°F
Avg Temperature
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.7 / 5.0
$50,000 median income, 3.1% unemployment
A+
Affordability
5.0 / 5.0
$134,800 home value, $584/mo rent
D
Education
1.8 / 5.0
10.2% bachelor's degree or higher
Birnamwood has a cool climate with an average annual temperature of 44°F (7°C). Winters average 15°F in January while summers reach 70°F in July. Annual precipitation totals 34.0 inches. The area receives 64.3 inches of snow annually. Air quality is rated Good with a median AQI of 37.
Temperature
15°F Jan (-9°C)
70°F Jul (21°C)
| Annual Average | 44.3°F |
| 18% below US avg | |
| January Average | 15°F (-9°C) |
| July Average | 70°F (21°C) |
Geography
| Elevation | 1,301 ft (397 m) |
| Area | 2.2 sq mi (5.7 km²) |
| Population Density | 313/sq mi |
| Coordinates | 44.9319°N, 89.2095°W |
| Timezone | America/Chicago |
| County | Marathon County County |
| Nearest Airport | Appleton International (ATW) 58 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 37.0 |
| Rating | Good |
| Good Days % | 85.0% |
| Unhealthy Days | 1 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0454 ppm |
| PM2.5 (Fine Particles) | 10.7 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 87.2 / 100 |
| Social Vulnerability | 24.6 / 100 |
| Community Resilience | 86.7 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | No Rating |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively High |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 15°F (-9°C) | 1.2 in | Coldest |
| February | 19°F (-7°C) | 1.1 in | Driest |
| March | 31°F (-1°C) | 1.7 in | |
| April | 44°F (6°C) | 3.2 in | |
| May | 56°F (13°C) | 4.0 in | |
| June | 66°F (19°C) | 4.5 in | Wettest |
| July | 70°F (21°C) | 3.8 in | Warmest |
| August | 68°F (20°C) | 4.0 in | |
| September | 60°F (16°C) | 3.8 in | |
| October | 47°F (9°C) | 3.0 in | |
| November | 34°F (1°C) | 2.1 in | |
| December | 22°F (-6°C) | 1.6 in |
Birnamwood has a seasonal temperature swing of 54°F / from 15°F in January to 70°F in July. Total annual precipitation is 34.0 inches, with June being the wettest month (4.5") and February the driest (1.1").