Charlestown, MD
Full City Profile · Maryland · Cecil County County
4.6
/5.0
A+
Excellent
2,037
Population
1,741/sq mi density
$109,650
Median Income
$39,808 per capita
$361,300
Home Value
$337,123 Zillow
$1,548
Median Rent
19.9% income on rent
55°F
Avg Temperature
A+
Overall
4.6 / 5.0
Strong
A+
Economy
4.9 / 5.0
$109,650 median income, 2.9% unemployment
A+
Affordability
4.8 / 5.0
$361,300 home value, $1,548/mo rent
A
Education
4.1 / 5.0
38.2% bachelor's degree or higher
Charlestown experiences four distinct seasons with an average annual temperature of 55°F (13°C). Winters average 33°F in January while summers reach 77°F in July. Annual precipitation totals 47.1 inches. The area receives 18.1 inches of snow annually. Air quality is rated Good with a median AQI of 44.
Temperature
33°F Jan (1°C)
77°F Jul (25°C)
| Annual Average | 55.2°F |
| 2% above US avg | |
| January Average | 33°F (1°C) |
| July Average | 77°F (25°C) |
Geography
| Elevation | 66 ft (20 m) |
| Area | 1.2 sq mi (3.0 km²) |
| Population Density | 1,741/sq mi |
| Coordinates | 39.5821°N, 75.9867°W |
| Timezone | America/New_York |
| County | Cecil County County |
| Nearest Airport | Philadelphia International (PHL) 44 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 44.0 |
| Rating | Good |
| Good Days % | 65.6% |
| Unhealthy Days | 3 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0471 ppm |
| PM2.5 (Fine Particles) | 6.8 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 58.6 / 100 |
| Social Vulnerability | 21.9 / 100 |
| Community Resilience | 60.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively High |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Moderate |
| Drought | Relatively High |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1840 | PHILADELPHIA, PENNSYLVANIA | Earthquake | - | - | 72 km |
Source: NOAA/NCEI Historical Tsunami Database. Sorted by wave height.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 33°F (1°C) | 3.3 in | Coldest |
| February | 36°F (2°C) | 2.8 in | Driest |
| March | 43°F (6°C) | 4.1 in | |
| April | 54°F (12°C) | 3.5 in | |
| May | 63°F (17°C) | 4.0 in | |
| June | 72°F (22°C) | 4.3 in | |
| July | 77°F (25°C) | 4.8 in | Warmest, Wettest |
| August | 75°F (24°C) | 4.2 in | |
| September | 69°F (20°C) | 4.8 in | |
| October | 57°F (14°C) | 4.2 in | |
| November | 46°F (8°C) | 3.3 in | |
| December | 38°F (3°C) | 3.9 in |
Charlestown has a seasonal temperature swing of 44°F / from 33°F in January to 77°F in July. Total annual precipitation is 47.1 inches, with July being the wettest month (4.8") and February the driest (2.8").