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Green Valley, MD
Full City Profile · Maryland · Frederick County County
3.9
/5.0
B+
Good
13,187
Population
771/sq mi density
$174,221
Median Income
$57,889 per capita
$579,100
Home Value
$661,650 Zillow
$2,683
Median Rent
22.8% income on rent
54°F
Avg Temperature
293 sunny days/yr
430
Violent Crime/100K
2,314 property/100K
B+
Overall
3.9 / 5.0
Good overall score based on economy, affordability, safety and education
A+
Economy
4.9 / 5.0
$174,221 median income, 2.7% unemployment
A+
Affordability
4.8 / 5.0
$579,100 home value, $2,683/mo rent
F
Safety
1.0 / 5.0
430 violent crimes/100K (13% above avg)
A+
Education
4.9 / 5.0
48.6% bachelor's degree or higher
Green Valley experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 32°F in January while summers reach 75°F in July. The area gets 293 sunny days per year. Annual precipitation totals 47.9 inches. The area receives 31.4 inches of snow annually. Air quality is rated Good with a median AQI of 41.
Temperature
32°F Jan (-0°C)
75°F Jul (24°C)
| Annual Average | 54.0°F |
| 0% below US avg | |
| January Average | 32°F (-0°C) |
| July Average | 75°F (24°C) |
| Sunny Days | 293 days/yr |
Geography
| Elevation | 663 ft (202 m) |
| Area | 17.1 sq mi (44.3 km²) |
| Population Density | 771/sq mi |
| Coordinates | 39.3418°N, 77.2403°W |
| Timezone | America/New_York |
| County | Frederick County County |
| Nearest Airport | Baltimore/Washington International Thurgood Marshall (BWI) 33 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Air Pollutants (EPA 2023)
| Ozone (O₃) | 0.0487 ppm |
Natural Hazard Risk
| Overall Risk | Relatively Low |
| Risk Score | 74.2 / 100 |
| Social Vulnerability | 10.6 / 100 |
| Community Resilience | 77.8 / 100 |
Hazard Breakdown
| Tornado | Relatively Moderate |
| Hurricane | Relatively Low |
| Earthquake | Relatively Low |
| Wildfire | Very Low |
| Flood | Relatively Moderate |
| Hail | Relatively Moderate |
| Strong Wind | Relatively Moderate |
| Heat Wave | Relatively Moderate |
| Winter Weather | Relatively High |
| Lightning | Relatively High |
| 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 | 32°F (-0°C) | 2.8 in | Coldest |
| February | 33°F (1°C) | 2.7 in | Driest |
| March | 42°F (6°C) | 3.5 in | |
| April | 52°F (11°C) | 3.3 in | |
| May | 62°F (17°C) | 3.9 in | Wettest |
| June | 70°F (21°C) | 3.7 in | |
| July | 75°F (24°C) | 3.7 in | Warmest |
| August | 73°F (23°C) | 3.7 in | |
| September | 67°F (19°C) | 3.4 in | |
| October | 55°F (13°C) | 2.9 in | |
| November | 45°F (7°C) | 3.2 in | |
| December | 36°F (2°C) | 3.0 in |
Green Valley has a seasonal temperature swing of 43°F / from 32°F in January to 75°F in July. Total annual precipitation is 39.9 inches, with May being the wettest month (3.9") and February the driest (2.7").