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Harleyville, SC
Full City Profile · South Carolina · Dorchester County County
2.8
/5.0
C+
Fair
653
Population
616/sq mi density
$60,231
Median Income
$30,309 per capita
$192,700
Home Value
$216,537 Zillow
$742
Median Rent
28.1% income on rent
64°F
Avg Temperature
304 sunny days/yr
576
Violent Crime/100K
3,746 property/100K
C+
Overall
2.8 / 5.0
Fair overall score based on economy, affordability, safety and education
B
Economy
3.3 / 5.0
$60,231 median income, 4.2% unemployment
A+
Affordability
4.9 / 5.0
$192,700 home value, $742/mo rent
F
Safety
1.0 / 5.0
576 violent crimes/100K (52% above avg)
D
Education
1.9 / 5.0
10.9% bachelor's degree or higher
Harleyville 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 50.5 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 | 63.9°F |
| 18% above US avg | |
| January Average | 46°F (8°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 304 days/yr |
Geography
| Elevation | 89 ft (27 m) |
| Area | 1.2 sq mi (3.0 km²) |
| Population Density | 616/sq mi |
| Coordinates | 33.2131°N, 80.4478°W |
| Timezone | America/New_York |
| County | Dorchester County County |
| Nearest Airport | Lowcountry Regional (RBW) 23 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 | — | — | 54 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 46°F (8°C) | 4.0 in | Coldest |
| February | 49°F (10°C) | 3.7 in | |
| March | 57°F (14°C) | 4.3 in | |
| April | 63°F (17°C) | 3.1 in | |
| May | 71°F (21°C) | 4.3 in | |
| June | 77°F (25°C) | 5.4 in | |
| July | 81°F (27°C) | 5.7 in | Warmest |
| August | 79°F (26°C) | 5.9 in | Wettest |
| September | 75°F (24°C) | 4.1 in | |
| October | 65°F (18°C) | 3.1 in | |
| November | 56°F (14°C) | 2.4 in | Driest |
| December | 49°F (10°C) | 3.5 in |
Harleyville has a seasonal temperature swing of 34°F / from 46°F in January to 81°F in July. Total annual precipitation is 49.4 inches, with August being the wettest month (5.9") and November the driest (2.4").