South Milwaukee, WI
Full City Profile · Wisconsin · Milwaukee County County
3.3
/5.0
B
Good
20,547
Population
4,254/sq mi density
$70,146
Median Income
$36,428 per capita
$216,400
Home Value
$307,215 Zillow
$1,014
Median Rent
27.7% income on rent
49°F
Avg Temperature
159
Violent Crime/100K
1,308 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.0 / 5.0
$70,146 median income, 3.4% unemployment
A+
Affordability
5.0 / 5.0
$216,400 home value, $1,014/mo rent
F
Safety
1.0 / 5.0
159 violent crimes/100K
B
Education
3.2 / 5.0
27.7% bachelor's degree or higher
South Milwaukee experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 24°F in January while summers reach 73°F in July. Annual precipitation totals 34.6 inches. The area receives 48.7 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
24°F Jan (-4°C)
73°F Jul (23°C)
| Annual Average | 49.3°F |
| 9% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 73°F (23°C) |
Geography
| Elevation | 670 ft (204 m) |
| Area | 4.8 sq mi (12.5 km²) |
| Population Density | 4,254/sq mi |
| Coordinates | 42.9126°N, 87.8623°W |
| Timezone | America/Chicago |
| County | Milwaukee County County |
| Nearest Airport | General Mitchell International (MKE) 3 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
| Good Days % | 68.6% |
| Unhealthy Days | 6 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0469 ppm |
| NO₂ (Nitrogen Dioxide) | 12.9 ppb |
| SO₂ (Sulfur Dioxide) | 0.48 ppb |
| CO (Carbon Monoxide) | 0.32 ppm |
| PM2.5 (Fine Particles) | 10.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.4 / 100 |
| Social Vulnerability | 63.8 / 100 |
| Community Resilience | 98.6 / 100 |
Hazard Breakdown
| Tornado | Very High |
| Hurricane | Very Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively High |
| Winter Weather | Very High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Very High |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 1.8 in | Coldest |
| February | 27°F (-3°C) | 1.7 in | Driest |
| March | 36°F (2°C) | 2.2 in | |
| April | 46°F (8°C) | 3.9 in | |
| May | 57°F (14°C) | 3.5 in | |
| June | 68°F (20°C) | 4.4 in | Wettest |
| July | 73°F (23°C) | 3.4 in | Warmest |
| August | 72°F (22°C) | 3.7 in | |
| September | 65°F (18°C) | 3.2 in | |
| October | 53°F (12°C) | 2.8 in | |
| November | 40°F (5°C) | 2.2 in | |
| December | 30°F (-1°C) | 1.9 in |
South Milwaukee has a seasonal temperature swing of 49°F / from 24°F in January to 73°F in July. Total annual precipitation is 34.6 inches, with June being the wettest month (4.4") and February the driest (1.7").