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Ashton-Sandy Spring, MD
Full City Profile · Maryland · Howard County County
3.8
/5.0
B+
Good
5,418
Population
528/sq mi density
$178,214
Median Income
$80,053 per capita
$812,000
Home Value
$757,862 Zillow
$1,415
Median Rent
21.3% income on rent
57°F
Avg Temperature
293 sunny days/yr
593
Violent Crime/100K
3,522 property/100K
B+
Overall
3.8 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
5.0 / 5.0
$178,214 median income, 1.6% unemployment
A
Affordability
4.1 / 5.0
$812,000 home value, $1,415/mo rent
F
Safety
1.0 / 5.0
593 violent crimes/100K (56% above avg)
A+
Education
5.0 / 5.0
59.9% bachelor's degree or higher
Ashton-Sandy Spring enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 34°F in January while summers reach 79°F in July. The area gets 293 sunny days per year. Annual precipitation totals 47.5 inches. Air quality is rated Good with a median AQI of 41.
Temperature
34°F Jan (1°C)
79°F Jul (26°C)
| Annual Average | 57.1°F |
| 6% above US avg | |
| January Average | 34°F (1°C) |
| July Average | 79°F (26°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 488 ft (149 m) |
| Area | 2.9 sq mi (7.6 km²) |
| Population Density | 528/sq mi |
| Coordinates | 39.1487°N, 76.9991°W |
| Timezone | America/New_York |
| County | Howard County County |
| Nearest Airport | Baltimore/Washington International Thurgood Marshall (BWI) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| NO₂ (Nitrogen Dioxide) | 20.7 ppb |
| CO (Carbon Monoxide) | 0.26 ppm |
| PM2.5 (Fine Particles) | 8.1 μg/m³ |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 72.4 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 92.9 / 100 |
Hazard Breakdown
| Tornado | Relatively Low |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Low |
| Strong Wind | Relatively High |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| Ice Storm | Relatively Low |
| Drought | Relatively Moderate |
| Cold Wave | Relatively Low |
| Landslide | Very Low |
| Coastal Flood | Very Low |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 34°F (1°C) | 3.3 in | Coldest |
| February | 35°F (2°C) | 2.9 in | Driest |
| March | 44°F (7°C) | 3.9 in | |
| April | 54°F (12°C) | 3.5 in | |
| May | 63°F (17°C) | 4.6 in | Wettest |
| June | 72°F (22°C) | 3.8 in | |
| July | 79°F (26°C) | 4.2 in | Warmest |
| August | 75°F (24°C) | 3.9 in | |
| September | 68°F (20°C) | 4.1 in | |
| October | 57°F (14°C) | 3.5 in | |
| November | 47°F (8°C) | 3.7 in | |
| December | 38°F (3°C) | 3.4 in |
Ashton-Sandy Spring has a seasonal temperature swing of 45°F / from 34°F in January to 79°F in July. Total annual precipitation is 44.7 inches, with May being the wettest month (4.6") and February the driest (2.9").