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San Mar, MD
Full City Profile · Maryland · Washington County County
3.0
/5.0
B
Good
433
Population
921/sq mi density
$88,056
Median Income
$75,088 per capita
$259,600
Home Value
$397,752 Zillow
$618
Median Rent
51.0% income on rent
54°F
Avg Temperature
293 sunny days/yr
58
Violent Crime/100K
777 property/100K
B
Overall
3.0 / 5.0
Good overall score based on economy, affordability, safety and education
B+
Economy
3.6 / 5.0
$88,056 median income, 11.9% unemployment
A+
Affordability
5.0 / 5.0
$259,600 home value, $618/mo rent
F
Safety
1.0 / 5.0
58 violent crimes/100K
C
Education
2.3 / 5.0
15.9% bachelor's degree or higher
San Mar experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 31°F in January while summers reach 76°F in July. The area gets 293 sunny days per year. Annual precipitation totals 43.6 inches. Air quality is rated Good with a median AQI of 41.
Temperature
31°F Jan (-0°C)
76°F Jul (25°C)
| Annual Average | 54.2°F |
| 0% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 76°F (25°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 567 ft (173 m) |
| Area | 0.5 sq mi (1.2 km²) |
| Population Density | 921/sq mi |
| Coordinates | 39.5522°N, 77.6409°W |
| Timezone | America/New_York |
| County | Washington County County |
| Nearest Airport | Hagerstown Regional/Richard A Henson Field (HGR) 12 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
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) | 2.8 in | Coldest |
| February | 32°F (-0°C) | 2.7 in | Driest |
| March | 41°F (5°C) | 3.4 in | |
| April | 51°F (10°C) | 3.5 in | |
| May | 61°F (16°C) | 4.2 in | Wettest |
| June | 69°F (21°C) | 4.0 in | |
| July | 76°F (25°C) | 3.6 in | Warmest |
| August | 72°F (22°C) | 3.5 in | |
| September | 65°F (19°C) | 3.6 in | |
| October | 54°F (12°C) | 3.4 in | |
| November | 44°F (7°C) | 3.5 in | |
| December | 34°F (1°C) | 3.0 in |
San Mar has a seasonal temperature swing of 45°F / from 31°F in January to 76°F in July. Total annual precipitation is 41.3 inches, with May being the wettest month (4.2") and February the driest (2.7").