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South Lyon, MI
Full City Profile · Michigan · Livingston County County
3.7
/5.0
B+
Good
11,825
Population
3,162/sq mi density
$83,822
Median Income
$50,353 per capita
$280,900
Home Value
$459,087 Zillow
$1,208
Median Rent
32.2% income on rent
47°F
Avg Temperature
260 sunny days/yr
50
Violent Crime/100K
277 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.6 / 5.0
$83,822 median income, 2.6% unemployment
A+
Affordability
4.8 / 5.0
$280,900 home value, $1,208/mo rent
F
Safety
1.0 / 5.0
50 violent crimes/100K
A+
Education
4.6 / 5.0
45.0% bachelor's degree or higher
South Lyon experiences four distinct seasons with an average annual temperature of 47°F (8°C). Winters average 22°F in January while summers reach 70°F in July. The area gets 260 sunny days per year. Annual precipitation totals 34.5 inches. Air quality is rated Good with a median AQI of 38.
Temperature
22°F Jan (-5°C)
70°F Jul (21°C)
| Annual Average | 47.1°F |
| 13% below US avg | |
| January Average | 22°F (-5°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 260 days/yr |
Geography
| Elevation | 924 ft (282 m) |
| Area | 3.7 sq mi (9.7 km²) |
| Population Density | 3,162/sq mi |
| Coordinates | 42.4610°N, 83.6532°W |
| Timezone | America/Detroit |
| County | Livingston County County |
| Nearest Airport | Oakland County International (PTK) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 38.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 73.5 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 94.8 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| 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 Moderate |
| Drought | No Rating |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 1.5 m (5 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1952 | LAKE HURON, MI | Avalanche | 1.5 m | - | 125 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 22°F (-5°C) | 1.8 in | Coldest, Driest |
| February | 25°F (-4°C) | 1.8 in | |
| March | 35°F (1°C) | 2.5 in | |
| April | 46°F (8°C) | 3.1 in | |
| May | 58°F (14°C) | 2.9 in | |
| June | 67°F (19°C) | 3.4 in | Wettest |
| July | 70°F (21°C) | 2.9 in | Warmest |
| August | 69°F (21°C) | 3.3 in | |
| September | 62°F (17°C) | 3.2 in | |
| October | 50°F (10°C) | 2.3 in | |
| November | 39°F (4°C) | 2.7 in | |
| December | 28°F (-2°C) | 2.5 in |
South Lyon has a seasonal temperature swing of 48°F / from 22°F in January to 70°F in July. Total annual precipitation is 32.3 inches, with June being the wettest month (3.4") and January the driest (1.8").