Mercersville, MD
Full City Profile · Maryland · Washington County County
3.3
/5.0
B
Good
233
Population
728/sq mi density
$51,333
Median Income
$34,477 per capita
53°F
Avg Temperature
B
Overall
3.3 / 5.0
Good overall score based on economy, affordability, safety and education
A
Economy
4.0 / 5.0
$51,333 median income, 0.0% unemployment
C+
Education
2.7 / 5.0
20.9% bachelor's degree or higher
Mercersville experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 31°F in January while summers reach 74°F in July. Annual precipitation totals 43.5 inches. The area receives 33.0 inches of snow annually. Air quality is rated Good with a median AQI of 40.
Temperature
31°F Jan (-0°C)
74°F Jul (23°C)
| Annual Average | 52.9°F |
| 2% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 74°F (23°C) |
Geography
| Elevation | 352 ft (107 m) |
| Area | 0.3 sq mi (0.8 km²) |
| Population Density | 728/sq mi |
| Coordinates | 39.4992°N, 77.7658°W |
| Timezone | America/New_York |
| County | Washington County County |
| Nearest Airport | Eastern Wv Regional/Shepherd Field (MRB) 13 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 40.0 |
| Rating | Good |
| Good Days % | 79.3% |
| Unhealthy Days | 0 |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0452 ppm |
| PM2.5 (Fine Particles) | 6.9 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 68.8 / 100 |
| Social Vulnerability | 44.6 / 100 |
| Community Resilience | 73.2 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Moderate |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively Moderate |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Avalanche | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 3.1 in | Coldest |
| February | 34°F (1°C) | 2.4 in | Driest |
| March | 41°F (5°C) | 3.7 in | |
| April | 52°F (11°C) | 3.6 in | |
| May | 61°F (16°C) | 4.6 in | Wettest |
| June | 70°F (21°C) | 4.2 in | |
| July | 74°F (23°C) | 4.3 in | Warmest |
| August | 73°F (23°C) | 3.3 in | |
| September | 66°F (19°C) | 4.4 in | |
| October | 54°F (12°C) | 3.4 in | |
| November | 44°F (7°C) | 3.1 in | |
| December | 35°F (2°C) | 3.5 in |
Mercersville has a seasonal temperature swing of 43°F / from 31°F in January to 74°F in July. Total annual precipitation is 43.5 inches, with May being the wettest month (4.6") and February the driest (2.4").