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Rockville, SC
Full City Profile · South Carolina · Colleton County County
3.4
/5.0
B
Good
125
Population
298/sq mi density
$76,563
Median Income
$52,148 per capita
$475,000
Home Value
$1,003,191 Zillow
67°F
Avg Temperature
304 sunny days/yr
483
Violent Crime/100K
18,841 property/100K
B
Overall
3.4 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$76,563 median income, 0.0% unemployment
B
Affordability
3.2 / 5.0
$475,000 home value, /mo rent
F
Safety
1.0 / 5.0
483 violent crimes/100K (27% above avg)
A+
Education
5.0 / 5.0
67.4% bachelor's degree or higher
Rockville enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 50°F in January while summers reach 82°F in July. The area gets 304 sunny days per year. Annual precipitation totals 51.9 inches. Air quality is rated Good with a median AQI of 43.
Temperature
50°F Jan (10°C)
82°F Jul (28°C)
| Annual Average | 66.7°F |
| 24% above US avg | |
| January Average | 50°F (10°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 304 days/yr |
Geography
| Elevation | 1 ft (0 m) |
| Area | 0.4 sq mi (1.1 km²) |
| Population Density | 298/sq mi |
| Coordinates | 32.6028°N, 80.1914°W |
| Timezone | America/New_York |
| County | Colleton County County |
| Nearest Airport | Charleston Afb/International (CHS) 22 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 85.5 / 100 |
| Social Vulnerability | 90.0 / 100 |
| Community Resilience | 45.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively High |
| Earthquake | Relatively Moderate |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Moderate |
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 | — | — | 38 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 50°F (10°C) | 3.7 in | Coldest |
| February | 51°F (11°C) | 3.3 in | |
| March | 58°F (14°C) | 4.1 in | |
| April | 64°F (18°C) | 2.8 in | |
| May | 72°F (22°C) | 3.7 in | |
| June | 78°F (25°C) | 5.4 in | |
| July | 82°F (28°C) | 6.0 in | Warmest |
| August | 80°F (27°C) | 7.3 in | Wettest |
| September | 76°F (25°C) | 5.2 in | |
| October | 67°F (20°C) | 2.9 in | |
| November | 59°F (15°C) | 2.6 in | Driest |
| December | 52°F (11°C) | 3.3 in |
Rockville has a seasonal temperature swing of 33°F / from 50°F in January to 82°F in July. Total annual precipitation is 50.2 inches, with August being the wettest month (7.3") and November the driest (2.6").