Grantsville, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grantsville, a town in Garrett County, Maryland.
Today
72°F
Patchy Fog then Mostly Cloudy
Patchy fog before 8am. Mostly cloudy, with a high near 72. Southeast wind around 7 mph.
7-day forecast for Grantsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 72°F | Patchy Fog then Mostly Cloudy | 7 mph SE | 5% |
| Tonight | 59°F | Mostly Cloudy then Slight Chance Rain Showers | 7 mph SE | 24% |
| Sunday | 75°F | Showers And Thunderstorms Likely | 5 to 10 mph SW | 75% |
| Sunday Night | 53°F | Showers And Thunderstorms | 2 to 7 mph N | 87% |
| Monday | 62°F | Chance Rain Showers | 7 mph E | 48% |
| Monday Night | 49°F | Showers And Thunderstorms | 7 to 12 mph E | 76% |
| Tuesday | 56°F | Showers And Thunderstorms | 14 mph SE | 79% |
| Tuesday Night | 45°F | Rain Showers Likely | 17 mph E | 70% |
| Wednesday | 53°F | Rain Showers Likely | 14 to 17 mph E | 64% |
| Wednesday Night | 46°F | Rain Showers Likely | 15 mph SE | 58% |
| Thursday | 57°F | Chance Rain Showers | 8 to 13 mph SE | 54% |
| Thursday Night | 46°F | Chance Showers And Thunderstorms | 8 mph E | 40% |
| Friday | 62°F | Chance Rain Showers | 7 mph NE | 31% |
| Friday Night | 45°F | Chance Rain Showers | 6 mph NE | 31% |
Forecast source: National Weather Service (api.weather.gov) for Grantsville (39.697, -79.153). Updated through the day.
Growing snapshot for Grantsville
Last spring frost
Apr 29
First fall frost
Oct 20
Growing season
174 days
Hardiness zone
6a
More local growing data for Grantsville: nearby ZIP 21536 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Accident
Barton
Bloomington
Crellin
Deer Park
Detmold
Franklin
Friendsville
Jennings
Kitzmiller
Loch Lynn Heights
Moscow
Mountain Lake Park
Nikep
Oakland
Swanton
Climate data from the nearest NOAA station, Savage Rvr Dam, Md (10.2 mi from Grantsville). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.