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St. Leonard, MD
Full City Profile · Maryland · Calvert County County
3.5
/5.0
B+
Good
562
Population
245/sq mi density
$188,056
Median Income
$66,255 per capita
$489,500
Home Value
$465,714 Zillow
59°F
Avg Temperature
297 sunny days/yr
159
Violent Crime/100K
317 property/100K
B+
Overall
3.5 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$188,056 median income, 0.0% unemployment
A+
Affordability
5.0 / 5.0
$489,500 home value, /mo rent
F
Safety
1.0 / 5.0
159 violent crimes/100K
C+
Education
2.9 / 5.0
23.4% bachelor's degree or higher
St. Leonard enjoys a temperate climate with an average annual temperature of 59°F (15°C). Winters average 38°F in January while summers reach 80°F in July. The area gets 297 sunny days per year. Air quality is rated Good with a median AQI of 41.
Temperature
38°F Jan (3°C)
80°F Jul (27°C)
| Annual Average | 58.9°F |
| 9% above US avg | |
| January Average | 38°F (3°C) |
| July Average | 80°F (27°C) |
| Sunny Days | 297 days/yr |
Geography
| Elevation | 83 ft (25 m) |
| Area | 2.3 sq mi (6.0 km²) |
| Population Density | 245/sq mi |
| Coordinates | 38.4674°N, 76.4986°W |
| Timezone | America/New_York |
| County | Calvert County County |
| Nearest Airport | St Mary's County Regional (LTW) 11 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0460 ppm |
Natural Hazard Risk
| Overall Risk | Very Low |
| Risk Score | 28.9 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 93.8 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively Moderate |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Very Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | Relatively Low |
| Lightning | Relatively Moderate |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Relatively Low |
| Coastal Flood | Relatively Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 38°F (3°C) | 3.6 in | Coldest |
| February | 38°F (3°C) | 3.2 in | Driest |
| March | 46°F (8°C) | 4.3 in | Wettest |
| April | 55°F (13°C) | 3.3 in | |
| May | 64°F (18°C) | 4.2 in | |
| June | 72°F (22°C) | 3.6 in | |
| July | 80°F (27°C) | 4.0 in | Warmest |
| August | 76°F (24°C) | 4.0 in | |
| September | 69°F (21°C) | 3.9 in | |
| October | 58°F (15°C) | 3.3 in | |
| November | 49°F (9°C) | 3.2 in | |
| December | 40°F (5°C) | 3.2 in |
St. Leonard has a seasonal temperature swing of 43°F / from 38°F in January to 80°F in July. Total annual precipitation is 43.6 inches, with March being the wettest month (4.3") and February the driest (3.2").