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Irwin, SC
Full City Profile · South Carolina · Lancaster County County
2.2
/5.0
C
Fair
1,801
Population
602/sq mi density
$53,795
Median Income
$27,830 per capita
$169,100
Home Value
$267,540 Zillow
$889
Median Rent
51.0% income on rent
61°F
Avg Temperature
310 sunny days/yr
403
Violent Crime/100K
3,077 property/100K
C
Overall
2.2 / 5.0
Fair overall score based on economy, affordability, safety and education
D
Economy
1.7 / 5.0
$53,795 median income, 11.9% unemployment
A+
Affordability
4.9 / 5.0
$169,100 home value, $889/mo rent
F
Safety
1.0 / 5.0
403 violent crimes/100K (6% above avg)
F
Education
1.2 / 5.0
2.9% bachelor's degree or higher
Irwin enjoys a temperate climate with an average annual temperature of 61°F (16°C). Winters average 42°F in January while summers reach 80°F in July. The area gets 310 sunny days per year. Annual precipitation totals 47.8 inches. The area receives 2.1 inches of snow annually. Air quality is rated Good with a median AQI of 43.
Temperature
42°F Jan (5°C)
80°F Jul (27°C)
| Annual Average | 60.9°F |
| 13% above US avg | |
| January Average | 42°F (5°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 310 days/yr |
Geography
| Elevation | 491 ft (150 m) |
| Area | 3.0 sq mi (7.7 km²) |
| Population Density | 602/sq mi |
| Coordinates | 34.6939°N, 80.8223°W |
| Timezone | America/New_York |
| County | Lancaster County County |
| Nearest Airport | Charlotte/Douglas International (CLT) 37 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 43.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 79.4 / 100 |
| Social Vulnerability | 42.1 / 100 |
| Community Resilience | 52.5 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Relatively Moderate |
| Landslide | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (5°C) | 4.5 in | Coldest |
| February | 45°F (7°C) | 3.7 in | |
| March | 52°F (11°C) | 4.8 in | Wettest |
| April | 60°F (16°C) | 3.0 in | Driest |
| May | 68°F (20°C) | 3.5 in | |
| June | 75°F (24°C) | 4.2 in | |
| July | 80°F (27°C) | 4.8 in | Warmest |
| August | 78°F (25°C) | 4.5 in | |
| September | 72°F (22°C) | 4.1 in | |
| October | 61°F (16°C) | 3.8 in | |
| November | 52°F (11°C) | 3.3 in | |
| December | 44°F (7°C) | 3.4 in |
Irwin has a seasonal temperature swing of 38°F / from 42°F in January to 80°F in July. Total annual precipitation is 47.4 inches, with March being the wettest month (4.8") and April the driest (3.0").