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Plum Branch, SC
Full City Profile · South Carolina · McCormick County County
3.9
/5.0
B+
Good
95
Population
128/sq mi density
$145,833
Median Income
$56,321 per capita
$121,900
Home Value
$384,538 Zillow
63°F
Avg Temperature
308 sunny days/yr
330
Violent Crime/100K
2,968 property/100K
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.5 / 5.0
$145,833 median income, 1.1% unemployment
A+
Affordability
5.0 / 5.0
$121,900 home value, /mo rent
F
Safety
1.0 / 5.0
330 violent crimes/100K
A+
Education
5.0 / 5.0
58.4% bachelor's degree or higher
Plum Branch enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 44°F in January while summers reach 81°F in July. The area gets 308 sunny days per year. Annual precipitation totals 47.3 inches. Air quality is rated Good with a median AQI of 43.
Temperature
44°F Jan (7°C)
81°F Jul (27°C)
| Annual Average | 62.5°F |
| 16% above US avg | |
| January Average | 44°F (7°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 308 days/yr |
Geography
| Elevation | 428 ft (130 m) |
| Area | 0.4 sq mi (0.9 km²) |
| Population Density | 128/sq mi |
| Coordinates | 33.8490°N, 82.2638°W |
| Timezone | America/New_York |
| County | McCormick County County |
| Nearest Airport | Aiken Regional (AIK) 36 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 9.5 / 100 |
| Social Vulnerability | 95.7 / 100 |
| Community Resilience | 18.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Very Low |
| Winter Weather | Very Low |
| Lightning | Very Low |
| Ice Storm | Relatively Low |
| Drought | No Rating |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 44°F (7°C) | 4.8 in | Coldest |
| February | 46°F (8°C) | 4.3 in | |
| March | 54°F (12°C) | 4.9 in | Wettest |
| April | 61°F (16°C) | 3.7 in | |
| May | 69°F (20°C) | 3.7 in | |
| June | 76°F (24°C) | 3.9 in | |
| July | 81°F (27°C) | 4.6 in | Warmest |
| August | 78°F (26°C) | 3.9 in | |
| September | 73°F (23°C) | 3.2 in | |
| October | 62°F (17°C) | 3.4 in | |
| November | 53°F (12°C) | 3.1 in | Driest |
| December | 45°F (7°C) | 3.8 in |
Plum Branch has a seasonal temperature swing of 37°F / from 44°F in January to 81°F in July. Total annual precipitation is 47.3 inches, with March being the wettest month (4.9") and November the driest (3.1").