Grantsville, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Grantsville, a town in Garrett County, Maryland.
Overnight
50°F
Mostly Clear
Mostly clear, with a low around 50. South wind around 3 mph.
7-day forecast for Grantsville
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Mostly Clear | 3 mph S | 1% |
| Wednesday | 72°F | Partly Sunny | 3 to 10 mph SE | 2% |
| Wednesday Night | 58°F | Rain Showers | 8 mph S | 89% |
| Thursday | 68°F | Rain Showers Likely | 6 to 10 mph SW | 57% |
| Thursday Night | 51°F | Slight Chance Rain Showers then Mostly Cloudy | 2 to 6 mph W | 19% |
| Friday | 62°F | Slight Chance Light Rain | 3 to 7 mph W | 17% |
| Friday Night | 41°F | Chance Light Rain | 3 to 8 mph W | 30% |
| Saturday | 49°F | Chance Light Rain | 10 to 15 mph W | 33% |
| Saturday Night | 36°F | Chance Light Rain | 14 mph W | 31% |
| Sunday | 51°F | Partly Sunny | 16 mph W | 14% |
| Sunday Night | 34°F | Partly Cloudy | 15 mph W | 8% |
| Monday | 51°F | Mostly Sunny | 14 to 18 mph W | 12% |
| Monday Night | 36°F | Mostly Clear | 10 to 14 mph W | 12% |
| Tuesday | 56°F | Sunny | 14 to 21 mph W | 5% |
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
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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 Nov 4, 2026.