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Barnwell, SC
Full City Profile · South Carolina · Barnwell County County
2.6
/5.0
C+
Fair
4,616
Population
589/sq mi density
$43,239
Median Income
$25,229 per capita
$137,300
Home Value
$173,229 Zillow
$545
Median Rent
33.0% income on rent
65°F
Avg Temperature
308 sunny days/yr
2,060
Violent Crime/100K
4,767 property/100K
C+
Overall
2.6 / 5.0
Fair overall score based on economy, affordability, safety and education
C
Economy
2.0 / 5.0
$43,239 median income, 8.3% unemployment
A+
Affordability
4.9 / 5.0
$137,300 home value, $545/mo rent
F
Safety
1.0 / 5.0
2,060 violent crimes/100K (442% above avg)
C
Education
2.4 / 5.0
18.1% bachelor's degree or higher
Barnwell enjoys a temperate climate with an average annual temperature of 65°F (18°C). Winters average 47°F in January while summers reach 82°F in July. The area gets 308 sunny days per year. Annual precipitation totals 48.7 inches. Air quality is rated Good with a median AQI of 43.
Temperature
47°F Jan (8°C)
82°F Jul (28°C)
| Annual Average | 64.7°F |
| 20% above US avg | |
| January Average | 47°F (8°C) |
| July Average | 82°F (28°C) |
| Sunny Days | 308 days/yr |
Geography
| Elevation | 205 ft (62 m) |
| Area | 7.9 sq mi (20.3 km²) |
| Population Density | 589/sq mi |
| Coordinates | 33.2416°N, 81.3661°W |
| Timezone | America/New_York |
| County | Barnwell County County |
| Nearest Airport | Barnwell Regional (BNL) 2 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 45.8 / 100 |
| Social Vulnerability | 98.9 / 100 |
| Community Resilience | 19.1 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Very Low |
| Lightning | Relatively Low |
| Ice Storm | Relatively Low |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very 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 | — | — | 133 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 47°F (8°C) | 4.3 in | Coldest |
| February | 49°F (9°C) | 3.9 in | |
| March | 56°F (14°C) | 4.5 in | |
| April | 63°F (17°C) | 3.0 in | |
| May | 71°F (22°C) | 3.7 in | |
| June | 78°F (25°C) | 5.2 in | Wettest |
| July | 82°F (28°C) | 4.8 in | Warmest |
| August | 79°F (26°C) | 5.2 in | |
| September | 75°F (24°C) | 3.5 in | |
| October | 64°F (18°C) | 2.9 in | |
| November | 55°F (13°C) | 2.6 in | Driest |
| December | 48°F (9°C) | 3.5 in |
Barnwell has a seasonal temperature swing of 35°F / from 47°F in January to 82°F in July. Total annual precipitation is 47.1 inches, with June being the wettest month (5.2") and November the driest (2.6").