Irwin, PA
Full City Profile · Pennsylvania · Westmoreland County County
3.3
/5.0
B
Good
3,862
Population
4,598/sq mi density
$60,747
Median Income
$38,146 per capita
$198,700
Home Value
$266,902 Zillow
$954
Median Rent
25.7% income on rent
52°F
Avg Temperature
43
Violent Crime/100K
87 property/100K
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.5 / 5.0
$60,747 median income, 1.9% unemployment
A+
Affordability
4.8 / 5.0
$198,700 home value, $954/mo rent
F
Safety
1.0 / 5.0
43 violent crimes/100K
B+
Education
3.9 / 5.0
36.7% bachelor's degree or higher
Irwin experiences four distinct seasons with an average annual temperature of 52°F (11°C). Winters average 30°F in January while summers reach 75°F in July. Annual precipitation totals 43.6 inches. The area receives 25.0 inches of snow annually. Air quality is rated Good with a median AQI of 39.
Temperature
30°F Jan (-1°C)
75°F Jul (24°C)
| Annual Average | 52.4°F |
| 3% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 75°F (24°C) |
Geography
| Elevation | 1,053 ft (321 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 4,598/sq mi |
| Coordinates | 40.3251°N, 79.6998°W |
| Timezone | America/New_York |
| County | Westmoreland County County |
| Nearest Airport | Arnold Palmer Regional (LBE) 16 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 39.0 |
| Rating | Good |
| Good Days % | 76.6% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0423 ppm |
| PM2.5 (Fine Particles) | 8.3 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 87.9 / 100 |
| Social Vulnerability | 30.2 / 100 |
| Community Resilience | 92.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively High |
| Hail | Relatively Moderate |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively High |
| Ice Storm | Relatively Moderate |
| Drought | Very Low |
| Cold Wave | Very Low |
| Landslide | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 3.2 in | Coldest |
| February | 31°F (-0°C) | 2.8 in | Driest |
| March | 40°F (4°C) | 3.3 in | |
| April | 51°F (11°C) | 3.8 in | |
| May | 63°F (17°C) | 4.1 in | |
| June | 71°F (22°C) | 4.6 in | |
| July | 75°F (24°C) | 4.8 in | Warmest, Wettest |
| August | 73°F (23°C) | 4.2 in | |
| September | 66°F (19°C) | 3.4 in | |
| October | 54°F (12°C) | 3.4 in | |
| November | 43°F (6°C) | 2.9 in | |
| December | 34°F (1°C) | 3.2 in |
Irwin has a seasonal temperature swing of 45°F / from 30°F in January to 75°F in July. Total annual precipitation is 43.6 inches, with July being the wettest month (4.8") and February the driest (2.8").