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James Island, SC
Full City Profile · South Carolina · Charleston County County
3.7
/5.0
B+
Good
11,738
Population
2,425/sq mi density
$100,176
Median Income
$44,971 per capita
$454,200
Home Value
$1,021,686 Zillow
$1,443
Median Rent
26.8% income on rent
67°F
Avg Temperature
308 sunny days/yr
440
Violent Crime/100K
3,187 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$100,176 median income, 0.9% unemployment
A
Affordability
4.1 / 5.0
$454,200 home value, $1,443/mo rent
F
Safety
1.0 / 5.0
440 violent crimes/100K (16% above avg)
A+
Education
4.8 / 5.0
48.0% bachelor's degree or higher
James Island enjoys a temperate climate with an average annual temperature of 67°F (19°C). Winters average 51°F in January while summers reach 82°F in July. The area gets 308 sunny days per year. Annual precipitation totals 44.3 inches. Air quality is rated Good with a median AQI of 43.
Temperature
51°F Jan (10°C)
82°F Jul (28°C)
| Annual Average | 67.2°F |
| 24% above US avg | |
| January Average | 51°F (10°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 308 days/yr |
Geography
| Elevation | 9 ft (3 m) |
| Area | 4.8 sq mi (12.5 km²) |
| Population Density | 2,425/sq mi |
| Coordinates | 32.7361°N, 79.9372°W |
| Timezone | America/New_York |
| County | Charleston County County |
| Nearest Airport | Charleston Afb/International (CHS) 13 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0396 ppm |
| NO₂ (Nitrogen Dioxide) | 6.6 ppb |
| SO₂ (Sulfur Dioxide) | 0.41 ppb |
| PM2.5 (Fine Particles) | 7.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.6 / 100 |
| Social Vulnerability | 22.4 / 100 |
| Community Resilience | 96.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Very High |
| Earthquake | Relatively High |
| Wildfire | Relatively Moderate |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
| Coastal Flood | Very High |
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 | — | — | 19 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 51°F (10°C) | 3.8 in | Coldest |
| February | 51°F (11°C) | 3.2 in | |
| March | 58°F (14°C) | 4.1 in | |
| April | 64°F (18°C) | 2.7 in | |
| May | 72°F (22°C) | 3.5 in | |
| June | 78°F (26°C) | 5.5 in | |
| July | 82°F (28°C) | 5.9 in | Warmest |
| August | 81°F (27°C) | 7.2 in | Wettest |
| September | 77°F (25°C) | 5.7 in | |
| October | 67°F (20°C) | 3.2 in | |
| November | 59°F (15°C) | 2.6 in | Driest |
| December | 52°F (11°C) | 3.1 in |
James Island has a seasonal temperature swing of 32°F / from 51°F in January to 82°F in July. Total annual precipitation is 50.4 inches, with August being the wettest month (7.2") and November the driest (2.6").