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Monongahela, PA
Full City Profile · Pennsylvania · Allegheny County County
3.1
/5.0
B
Good
4,113
Population
2,153/sq mi density
$55,500
Median Income
$33,624 per capita
$119,300
Home Value
$144,194 Zillow
$817
Median Rent
27.8% income on rent
53°F
Avg Temperature
275 sunny days/yr
123
Violent Crime/100K
847 property/100K
B
Overall
3.1 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$55,500 median income, 5.0% unemployment
A+
Affordability
5.0 / 5.0
$119,300 home value, $817/mo rent
F
Safety
1.0 / 5.0
123 violent crimes/100K
C+
Education
2.7 / 5.0
21.1% bachelor's degree or higher
Monongahela experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 30°F in January while summers reach 74°F in July. The area gets 275 sunny days per year. Annual precipitation totals 40.9 inches. The area receives 10.3 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
30°F Jan (-1°C)
74°F Jul (24°C)
| Annual Average | 52.9°F |
| 2% below US avg | |
| January Average | 30°F (-1°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 275 days/yr |
Geography
| Elevation | 1,057 ft (322 m) |
| Area | 2.1 sq mi (5.5 km²) |
| Population Density | 2,153/sq mi |
| Coordinates | 40.1912°N, 79.9225°W |
| Timezone | America/New_York |
| County | Allegheny County County |
| Nearest Airport | Pittsburgh International (PIT) 26 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0432 ppm |
| NO₂ (Nitrogen Dioxide) | 11.6 ppb |
| SO₂ (Sulfur Dioxide) | 2.41 ppb |
| CO (Carbon Monoxide) | 0.39 ppm |
| PM2.5 (Fine Particles) | 10.2 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively High |
| Risk Score | 98.1 / 100 |
| Social Vulnerability | 32.7 / 100 |
| Community Resilience | 91.9 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Very High |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Very High |
| Drought | No Rating |
| Cold Wave | Very High |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 30°F (-1°C) | 2.5 in | Coldest |
| February | 31°F (-1°C) | 2.3 in | Driest |
| March | 40°F (4°C) | 3.4 in | |
| April | 50°F (10°C) | 3.3 in | |
| May | 60°F (16°C) | 3.9 in | Wettest |
| June | 68°F (20°C) | 3.8 in | |
| July | 74°F (24°C) | 3.8 in | Warmest |
| August | 71°F (22°C) | 3.7 in | |
| September | 64°F (18°C) | 3.2 in | |
| October | 53°F (12°C) | 2.6 in | |
| November | 43°F (6°C) | 3.0 in | |
| December | 33°F (1°C) | 2.8 in |
Monongahela has a seasonal temperature swing of 44°F / from 30°F in January to 74°F in July. Total annual precipitation is 38.1 inches, with May being the wettest month (3.9") and February the driest (2.3").