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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
$297,849 Zillow
$1,014
Median Rent
27.7% income on rent
48°F
Avg Temperature
260 sunny days/yr
140
Violent Crime/100K
1,674 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$70,146 median income, 2.2% unemployment
A+
Affordability
5.0 / 5.0
$216,400 home value, $1,014/mo rent
F
Safety
1.0 / 5.0
140 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 48°F (9°C). Winters average 23°F in January while summers reach 73°F in July. The area gets 260 sunny days per year. Annual precipitation totals 36.6 inches. Air quality is rated Good with a median AQI of 38.
Temperature
23°F Jan (-5°C)
73°F Jul (23°C)
| Annual Average | 48.4°F |
| 10% below US avg | |
| January Average | 23°F (-5°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 260 days/yr |
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 | 38.0 |
| Rating | Good |
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 | 23°F (-5°C) | 1.6 in | Coldest |
| February | 25°F (-4°C) | 1.3 in | Driest |
| March | 34°F (1°C) | 2.2 in | |
| April | 45°F (7°C) | 3.5 in | |
| May | 56°F (13°C) | 3.0 in | |
| June | 66°F (19°C) | 3.7 in | |
| July | 73°F (23°C) | 3.6 in | Warmest |
| August | 70°F (21°C) | 3.9 in | Wettest |
| September | 62°F (17°C) | 3.5 in | |
| October | 51°F (10°C) | 2.3 in | |
| November | 38°F (3°C) | 2.4 in | |
| December | 26°F (-4°C) | 2.0 in |
South Milwaukee has a seasonal temperature swing of 49°F / from 23°F in January to 73°F in July. Total annual precipitation is 33.0 inches, with August being the wettest month (3.9") and February the driest (1.3").