Green Valley, MD
Full City Profile · Maryland · Frederick County County
4.8
/5.0
A+
Excellent
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
A+
Overall
4.8 / 5.0
Strong
A+
Economy
4.7 / 5.0
$174,221 median income, 4.3% unemployment
A+
Affordability
4.8 / 5.0
$579,100 home value, $2,683/mo rent
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. 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 43.
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) |
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 | 43.0 |
| Rating | Good |
| Good Days % | 79.0% |
| Unhealthy Days | 0 |
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) | 3.4 in | Coldest |
| February | 34°F (1°C) | 3.0 in | Driest |
| March | 42°F (6°C) | 4.0 in | |
| April | 53°F (12°C) | 3.6 in | |
| May | 63°F (17°C) | 4.4 in | |
| June | 71°F (22°C) | 4.7 in | |
| July | 75°F (24°C) | 4.5 in | Warmest |
| August | 74°F (23°C) | 4.2 in | |
| September | 67°F (19°C) | 4.8 in | Wettest |
| October | 56°F (13°C) | 4.0 in | |
| November | 45°F (7°C) | 3.5 in | |
| December | 37°F (3°C) | 3.9 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 47.9 inches, with September being the wettest month (4.8") and February the driest (3.0").