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Allendale, SC
Full City Profile · South Carolina · Barnwell County County
2.7
/5.0
C+
Fair
2,595
Population
784/sq mi density
$25,250
Median Income
$17,054 per capita
$65,300
Home Value
$63,508 Zillow
$685
Median Rent
34.5% income on rent
63°F
Avg Temperature
308 sunny days/yr
2,599
Violent Crime/100K
4,651 property/100K
C+
Overall
2.7 / 5.0
Fair overall score based on economy, affordability, safety and education
C
Economy
2.3 / 5.0
$25,250 median income, 1.6% unemployment
A+
Affordability
5.0 / 5.0
$65,300 home value, $685/mo rent
F
Safety
1.0 / 5.0
2,599 violent crimes/100K (584% above avg)
C+
Education
2.7 / 5.0
20.9% bachelor's degree or higher
Allendale enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 46°F in January while summers reach 81°F in July. The area gets 308 sunny days per year. Annual precipitation totals 48.8 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 | 63.4°F |
| 17% above US avg | |
| January Average | 46°F (8°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 308 days/yr |
Geography
| Elevation | 189 ft (58 m) |
| Area | 3.3 sq mi (8.6 km²) |
| Population Density | 784/sq mi |
| Coordinates | 33.0080°N, 81.3092°W |
| Timezone | America/New_York |
| County | Barnwell County County |
| Nearest Airport | Barnwell Regional (BNL) 18 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 | — | — | 123 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) | 3.9 in | |
| March | 57°F (14°C) | 4.4 in | |
| April | 64°F (18°C) | 3.0 in | |
| May | 71°F (22°C) | 4.0 in | |
| June | 78°F (25°C) | 5.4 in | |
| July | 81°F (27°C) | 5.1 in | Warmest |
| August | 80°F (26°C) | 5.6 in | Wettest |
| September | 75°F (24°C) | 3.7 in | |
| October | 65°F (18°C) | 2.7 in | |
| November | 56°F (14°C) | 2.5 in | Driest |
| December | 49°F (10°C) | 3.4 in |
Allendale has a seasonal temperature swing of 35°F / from 46°F in January to 81°F in July. Total annual precipitation is 47.9 inches, with August being the wettest month (5.6") and November the driest (2.5").