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Blenheim, SC
Full City Profile · South Carolina · Marlboro County County
3.3
/5.0
B
Good
46
Population
71/sq mi density
$66,667
Median Income
$28,957 per capita
$142,500
Home Value
$115,790 Zillow
63°F
Avg Temperature
310 sunny days/yr
1,260
Violent Crime/100K
4,245 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.3 / 5.0
$66,667 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$142,500 home value, /mo rent
F
Safety
1.0 / 5.0
1,260 violent crimes/100K (232% above avg)
B
Education
3.1 / 5.0
25.7% bachelor's degree or higher
Blenheim enjoys a temperate climate with an average annual temperature of 63°F (17°C). Winters average 45°F in January while summers reach 81°F in July. The area gets 310 sunny days per year. Annual precipitation totals 41.7 inches. Air quality is rated Good with a median AQI of 43.
Temperature
45°F Jan (7°C)
81°F Jul (27°C)
| Annual Average | 63.4°F |
| 17% above US avg | |
| January Average | 45°F (7°C) |
| July Average | 81°F (27°C) |
| Sunny Days | 310 days/yr |
Geography
| Elevation | 114 ft (35 m) |
| Area | 0.7 sq mi (1.7 km²) |
| Population Density | 71/sq mi |
| Coordinates | 34.5098°N, 79.6525°W |
| Timezone | America/New_York |
| County | Marlboro County County |
| Nearest Airport | Florence Regional (FLO) 23 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 57.5 / 100 |
| Social Vulnerability | 97.8 / 100 |
| Community Resilience | 17.6 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Relatively Low |
| Flood | Relatively Low |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 45°F (7°C) | 4.0 in | Coldest |
| February | 46°F (8°C) | 3.7 in | |
| March | 54°F (12°C) | 4.3 in | |
| April | 62°F (17°C) | 2.8 in | Driest |
| May | 70°F (21°C) | 3.5 in | |
| June | 77°F (25°C) | 4.6 in | |
| July | 81°F (27°C) | 5.4 in | Warmest, Wettest |
| August | 79°F (26°C) | 4.9 in | |
| September | 73°F (23°C) | 3.7 in | |
| October | 62°F (17°C) | 3.0 in | |
| November | 54°F (12°C) | 2.8 in | |
| December | 46°F (8°C) | 3.2 in |
Blenheim has a seasonal temperature swing of 36°F / from 45°F in January to 81°F in July. Total annual precipitation is 45.9 inches, with July being the wettest month (5.4") and April the driest (2.8").