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| Back to Maryland, United States. Do you have any pictures of this city? ![]() Planning a vacation? Current weather forecast for Green Valley, MD Land area: 20.6 square miles Zip code: 21770 Median resident age: 37.4 years New: Green Valley, MD residents, houses, and apartments details Races in Green Valley:
Ancestries: German (25.2%), Irish (20.2%), English (16.1%), United States (8.0%), Italian (7.6%), Polish (4.3%). |
![]() For population 25 years and over in Green Valley
For population 15 years and over in Green Valley CDP
2.4% Foreign born (1.8% Europe, 0.4% Latin America). |
![]() Nearest city with pop. 50,000+: Germantown, MD (11.4 miles, pop. 55,419). Nearest city with pop. 200,000+: Washington, DC (33.5 miles, pop. 572,059). Nearest city with pop. 1,000,000+: Philadelphia, PA (151.0 miles, pop. 1,517,550). Nearest cities: New Market, MD (3.7 miles), Damascus, MD (5.4 miles), Mount Airy, MD (6.3 miles), Linganore-Bartonsville, MD (7.4 miles), Clarksburg, MD (9.1 miles), Laytonsville, MD (11.4 miles), Germantown, MD (11.4 miles), Discovery-Spring Garden, MD (11.8 miles). Area code commonly used in this area: 301 Industries providing employment: Professional,scientific,management,administrative,and waste management services (18.7%), Educational,health and social services (17.1%), Retail trade (10.7%), Construction (10.3%). |
Based on data reported by over 4,000 weather stations
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Average temp. (°F) | 31.5 | 34.4 | 43.0 | 52.9 | 62.2 | 70.6 | 75.2 | 73.3 | 66.5 | 54.9 | 45.0 | 36.0 |
| High temperature (°F) | 39.9 | 43.8 | 53.5 | 64.7 | 73.7 | 81.8 | 86.0 | 84.1 | 77.5 | 66.5 | 55.0 | 44.5 |
| Low temperature (°F) | 23.0 | 24.8 | 32.6 | 41.0 | 50.7 | 59.4 | 64.3 | 62.4 | 55.5 | 43.4 | 34.9 | 27.5 |
| Precipitation (in) | 3.2 | 2.9 | 3.9 | 3.2 | 4.3 | 3.8 | 3.9 | 3.5 | 4.0 | 3.4 | 3.5 | 3.3 |
Based on data reported by main weather stations
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
| Days with precip. | 10 | 9 | 11 | 10 | 11 | 10 | 10 | 9 | 8 | 7 | 9 | 9 |
| Wind speed (mph) | 8.9 | 9.4 | 10.0 | 9.6 | 8.3 | 7.7 | 7.1 | 6.9 | 7.2 | 7.6 | 8.4 | 8.5 |
| Morning humidity (%) | 74 | 74 | 74 | 74 | 79 | 80 | 82 | 85 | 87 | 85 | 80 | 76 |
| Afternoon humidity (%) | 57 | 54 | 51 | 49 | 53 | 54 | 54 | 55 | 56 | 54 | 54 | 57 |
| Sunshine (%) | 49 | 53 | 56 | 56 | 57 | 63 | 63 | 62 | 60 | 58 | 51 | 48 |
| Days clear of clouds | 7 | 7 | 7 | 7 | 7 | 7 | 8 | 9 | 10 | 11 | 8 | 8 |
| Partly cloudy days | 7 | 7 | 8 | 9 | 10 | 11 | 12 | 11 | 9 | 8 | 8 | 7 |
| Cloudy days | 16 | 15 | 15 | 14 | 14 | 11 | 11 | 12 | 12 | 12 | 14 | 16 |
| Snowfall (in) | 6.7 | 6.2 | 3.3 | 0.2 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 1.0 | 3.2 |
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