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St. Clair, MI
Full City Profile · Michigan · St. Clair County County
3.3
/5.0
B
Good
5,581
Population
1,898/sq mi density
$68,482
Median Income
$45,465 per capita
$241,700
Home Value
$226,266 Zillow
$1,033
Median Rent
32.0% income on rent
50°F
Avg Temperature
260 sunny days/yr
227
Violent Crime/100K
1,230 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.2 / 5.0
$68,482 median income, 2.6% unemployment
A+
Affordability
4.7 / 5.0
$241,700 home value, $1,033/mo rent
F
Safety
1.0 / 5.0
227 violent crimes/100K
B
Education
3.3 / 5.0
28.3% bachelor's degree or higher
St. Clair experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 25°F in January while summers reach 73°F in July. The area gets 260 sunny days per year. Annual precipitation totals 34.9 inches. The area receives 35.5 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
25°F Jan (-4°C)
73°F Jul (23°C)
| Annual Average | 49.5°F |
| 8% below US avg | |
| January Average | 25°F (-4°C) |
| July Average | 73°F (23°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 616 ft (188 m) |
| Area | 3.6 sq mi (9.3 km²) |
| Population Density | 1,898/sq mi |
| Coordinates | 42.8265°N, 82.4924°W |
| Timezone | America/Detroit |
| County | St. Clair County County |
| Nearest Airport | St Clair County International (PHN) 6 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
| Good Days % | 72.5% |
| Unhealthy Days | 3 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0439 ppm |
| SO₂ (Sulfur Dioxide) | 1.95 ppb |
| PM2.5 (Fine Particles) | 9.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 82.0 / 100 |
| Social Vulnerability | 32.6 / 100 |
| Community Resilience | 89.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively High |
| Drought | No Rating |
| Cold Wave | Relatively High |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 2.7 m (9 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1823 | LAKE ERIE | Unknown | 2.7 m | - | 136 km |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 31 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 25°F (-4°C) | 2.1 in | |
| February | 24°F (-5°C) | 2.1 in | Coldest, Driest |
| March | 33°F (1°C) | 2.3 in | |
| April | 44°F (7°C) | 3.0 in | |
| May | 56°F (13°C) | 3.0 in | |
| June | 66°F (19°C) | 3.3 in | |
| July | 73°F (23°C) | 2.8 in | Warmest |
| August | 70°F (21°C) | 3.2 in | |
| September | 63°F (17°C) | 3.9 in | Wettest |
| October | 52°F (11°C) | 2.7 in | |
| November | 40°F (5°C) | 3.2 in | |
| December | 29°F (-2°C) | 2.6 in |
St. Clair has a seasonal temperature swing of 50°F / from 24°F in February to 73°F in July. Total annual precipitation is 34.2 inches, with September being the wettest month (3.9") and February the driest (2.1").