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Bryn Mawr, PA
Full City Profile · Pennsylvania · Philadelphia County County
3.6
/5.0
B+
Good
5,777
Population
6,018/sq mi density
$87,218
Median Income
$49,556 per capita
$391,900
Home Value
$878,062 Zillow
$2,113
Median Rent
34.8% income on rent
55°F
Avg Temperature
271 sunny days/yr
143
Violent Crime/100K
1,361 property/100K
B+
Overall
3.6 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.4 / 5.0
$87,218 median income, 4.6% unemployment
A
Affordability
4.1 / 5.0
$391,900 home value, $2,113/mo rent
F
Safety
1.0 / 5.0
143 violent crimes/100K
A+
Education
5.0 / 5.0
61.2% bachelor's degree or higher
Bryn Mawr experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 32°F in January while summers reach 78°F in July. The area gets 271 sunny days per year. Annual precipitation totals 50.7 inches. The area receives 25.3 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
32°F Jan (0°C)
78°F Jul (25°C)
| Annual Average | 55.0°F |
| 2% above US avg | |
| January Average | 32°F (0°C) |
| July Average | 78°F (25°C) |
| Sunny Days | 271 days/yr |
Geography
| Elevation | 416 ft (127 m) |
| Area | 0.6 sq mi (1.6 km²) |
| Population Density | 6,018/sq mi |
| Coordinates | 40.0208°N, 75.3162°W |
| Timezone | America/New_York |
| County | Philadelphia County County |
| Nearest Airport | Philadelphia International (PHL) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0428 ppm |
| NO₂ (Nitrogen Dioxide) | 18.7 ppb |
| SO₂ (Sulfur Dioxide) | 0.54 ppb |
| CO (Carbon Monoxide) | 0.38 ppm |
| PM2.5 (Fine Particles) | 11.6 μg/m³ |
Natural Hazard Risk
| Overall Risk | Very High |
| Risk Score | 99.6 / 100 |
| Social Vulnerability | 88.1 / 100 |
| Community Resilience | 48.5 / 100 |
Hazard Breakdown
| Tornado | Relatively High |
| Hurricane | Relatively High |
| Earthquake | Relatively High |
| Wildfire | Very Low |
| Flood | Very High |
| Hail | Relatively High |
| Strong Wind | Relatively High |
| Heat Wave | Very High |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Relatively High |
| Drought | Very Low |
| Cold Wave | Very High |
| Landslide | Relatively Low |
| Coastal Flood | Relatively High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
2 tsunamis recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1895 | HIGH BRIDGE, NJ | Earthquake | — | — | 81 km |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | — | — | 27 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 32°F (0°C) | 3.5 in | Coldest |
| February | 33°F (0°C) | 2.9 in | Driest |
| March | 41°F (5°C) | 3.8 in | |
| April | 51°F (11°C) | 3.8 in | |
| May | 62°F (17°C) | 4.3 in | |
| June | 70°F (21°C) | 3.7 in | |
| July | 78°F (25°C) | 4.5 in | Warmest, Wettest |
| August | 74°F (23°C) | 4.3 in | |
| September | 67°F (19°C) | 4.0 in | |
| October | 55°F (13°C) | 3.1 in | |
| November | 46°F (8°C) | 3.7 in | |
| December | 36°F (2°C) | 3.5 in |
Bryn Mawr has a seasonal temperature swing of 46°F / from 32°F in January to 78°F in July. Total annual precipitation is 45.0 inches, with July being the wettest month (4.5") and February the driest (2.9").