Green Valley, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Green Valley, a community in Frederick County, Maryland.
Overnight
52°F
Mostly Clear
Mostly clear, with a low around 52. South wind around 5 mph.
7-day forecast for Green Valley
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 52°F | Mostly Clear | 5 mph S | 2% |
| Wednesday | 72°F | Mostly Sunny | 5 to 12 mph S | 2% |
| Wednesday Night | 61°F | Mostly Cloudy then Light Rain Likely | 7 to 10 mph S | 61% |
| Thursday | 73°F | Light Rain Likely | 6 to 10 mph S | 67% |
| Thursday Night | 60°F | Chance Light Rain | 2 to 6 mph SW | 51% |
| Friday | 68°F | Rain Likely | 5 mph N | 56% |
| Friday Night | 49°F | Chance Light Rain | 1 to 5 mph NW | 50% |
| Saturday | 62°F | Mostly Sunny | 5 to 12 mph NW | 12% |
| Saturday Night | 40°F | Partly Cloudy | 3 to 8 mph NW | 12% |
| Sunday | 59°F | Mostly Sunny | 5 to 8 mph W | 7% |
| Sunday Night | 39°F | Partly Cloudy then Slight Chance Light Rain | 7 mph W | 21% |
| Monday | 59°F | Slight Chance Light Rain | 7 to 16 mph NW | 21% |
| Monday Night | 38°F | Slight Chance Light Rain | 3 to 8 mph W | 20% |
| Tuesday | 62°F | Sunny | 6 to 14 mph W | 12% |
Forecast source: National Weather Service (api.weather.gov) for Green Valley (39.342, -77.240). Updated through the day.
Growing snapshot for Green Valley
Last spring frost
Apr 14
First fall frost
Oct 29
Growing season
196 days
Hardiness zone
7a
More local growing data for Green Valley: nearby ZIP 21770 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Adamstown
Bagtown
Ballenger Creek
Bartonsville
Braddock Heights
Brunswick
Buckeystown
Burkittsville
Emmitsburg
Frederick
Garretts Mill
Graceham
Jefferson
Lewistown
Libertytown
Linganore
Middletown
Monrovia
Mount Airy
Myersville
New Market
Point of Rocks
Rosemont
Sabillasville
Sandy Hook
Spring Ridge
Thurmont
Union Bridge
Urbana
Walkersville
Climate data from the nearest NOAA station, Damascus 3 Ssw, Md (6 mi from Green Valley). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.