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Summerville, SC
Full City Profile · South Carolina · Dorchester County County
3.4
/5.0
B
Good
51,262
Population
2,268/sq mi density
$78,621
Median Income
$39,271 per capita
$295,700
Home Value
$378,031 Zillow
$1,414
Median Rent
30.5% income on rent
64°F
Avg Temperature
304 sunny days/yr
352
Violent Crime/100K
3,143 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$78,621 median income, 3.3% unemployment
A+
Affordability
4.6 / 5.0
$295,700 home value, $1,414/mo rent
F
Safety
1.0 / 5.0
352 violent crimes/100K
B+
Education
3.5 / 5.0
31.7% bachelor's degree or higher
Summerville enjoys a temperate climate with an average annual temperature of 64°F (18°C). Winters average 46°F in January while summers reach 81°F in July. The area gets 304 sunny days per year. Annual precipitation totals 52.7 inches. Air quality is rated Good with a median AQI of 43.
Temperature
46°F Jan (8°C)
81°F Jul (27°C)
| Annual Average | 63.8°F |
| 18% above US avg | |
| January Average | 46°F (8°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 304 days/yr |
Geography
| Elevation | 49 ft (15 m) |
| Area | 22.6 sq mi (58.5 km²) |
| Population Density | 2,268/sq mi |
| Coordinates | 33.0058°N, 80.1793°W |
| Timezone | America/New_York |
| County | Dorchester County County |
| Nearest Airport | Charleston Afb/International (CHS) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 93.7 / 100 |
| Social Vulnerability | 16.0 / 100 |
| Community Resilience | 57.4 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1886 | CHARLESTON, SC | Earthquake | — | — | 21 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 46°F (8°C) | 4.2 in | Coldest |
| February | 50°F (10°C) | 3.5 in | |
| March | 57°F (14°C) | 4.3 in | |
| April | 63°F (17°C) | 3.0 in | |
| May | 71°F (22°C) | 3.9 in | |
| June | 77°F (25°C) | 5.6 in | |
| July | 81°F (27°C) | 5.9 in | Warmest |
| August | 80°F (26°C) | 6.4 in | Wettest |
| September | 75°F (24°C) | 4.9 in | |
| October | 65°F (18°C) | 3.2 in | |
| November | 57°F (14°C) | 2.5 in | Driest |
| December | 50°F (10°C) | 3.4 in |
Summerville has a seasonal temperature swing of 34°F / from 46°F in January to 81°F in July. Total annual precipitation is 51.1 inches, with August being the wettest month (6.4") and November the driest (2.5").