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South Portland, ME
Full City Profile · Maine · Cumberland County County
3.7
/5.0
B+
Good
26,780
Population
2,222/sq mi density
$84,563
Median Income
$49,719 per capita
$405,800
Home Value
$501,480 Zillow
$1,648
Median Rent
30.8% income on rent
48°F
Avg Temperature
246 sunny days/yr
187
Violent Crime/100K
2,192 property/100K
B+
Overall
3.7 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.7 / 5.0
$84,563 median income, 2.0% unemployment
B+
Affordability
4.0 / 5.0
$405,800 home value, $1,648/mo rent
F
Safety
1.0 / 5.0
187 violent crimes/100K
A+
Education
4.9 / 5.0
49.3% bachelor's degree or higher
South Portland experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 24°F in January while summers reach 70°F in July. The area gets 246 sunny days per year. Annual precipitation totals 48.1 inches. The area receives 68.7 inches of snow annually. Air quality is rated Good with a median AQI of 34.
Temperature
24°F Jan (-4°C)
70°F Jul (21°C)
| Annual Average | 47.5°F |
| 12% below US avg | |
| January Average | 24°F (-4°C) |
| July Average | 70°F (21°C) |
| Sunny Days | 246 days/yr |
Geography
| Elevation | 61 ft (19 m) |
| Area | 14.0 sq mi (36.3 km²) |
| Population Density | 2,222/sq mi |
| Coordinates | 43.6314°N, 70.2860°W |
| Timezone | America/New_York |
| County | Cumberland County County |
| Nearest Airport | Portland International Jetport (PWM) 1 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 34.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0376 ppm |
| NO₂ (Nitrogen Dioxide) | 10.4 ppb |
| PM2.5 (Fine Particles) | 7.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 77.0 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 98.8 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Low |
| Winter Weather | Very High |
| Lightning | Relatively High |
| Ice Storm | Very High |
| Drought | Relatively Low |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Coastal Flood | Relatively Moderate |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 3.6 m (12 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 2008 | MAINE | Avalanche | 3.6 m | — | 51 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 24°F (-4°C) | 3.9 in | Coldest |
| February | 25°F (-4°C) | 3.3 in | |
| March | 34°F (1°C) | 4.1 in | |
| April | 44°F (7°C) | 4.2 in | |
| May | 54°F (12°C) | 3.8 in | |
| June | 63°F (17°C) | 3.3 in | |
| July | 70°F (21°C) | 3.2 in | Warmest |
| August | 68°F (20°C) | 3.2 in | Driest |
| September | 60°F (15°C) | 3.4 in | |
| October | 49°F (10°C) | 4.2 in | |
| November | 39°F (4°C) | 4.7 in | Wettest |
| December | 28°F (-2°C) | 4.3 in |
South Portland has a seasonal temperature swing of 46°F / from 24°F in January to 70°F in July. Total annual precipitation is 45.5 inches, with November being the wettest month (4.7") and August the driest (3.2").