Mount Aetna, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Aetna, a community in Washington County, Maryland.
Tonight
53°F
Mostly Clear
Mostly clear, with a low around 53. Southeast wind around 7 mph.
7-day forecast for Mount Aetna
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 53°F | Mostly Clear | 7 mph SE | 1% |
| Wednesday | 73°F | Mostly Sunny | 6 to 14 mph S | 2% |
| Wednesday Night | 62°F | Mostly Cloudy then Light Rain | 10 mph S | 87% |
| Thursday | 74°F | Light Rain | 6 to 12 mph S | 79% |
| Thursday Night | 59°F | Light Rain Likely | 5 mph W | 57% |
| Friday | 69°F | Chance Light Rain | 3 mph NW | 52% |
| Friday Night | 48°F | Chance Light Rain then Partly Cloudy | 2 to 6 mph NW | 44% |
| Saturday | 62°F | Mostly Sunny | 6 to 13 mph NW | 12% |
| Saturday Night | 40°F | Partly Cloudy | 6 to 10 mph NW | 12% |
| Sunday | 59°F | Mostly Sunny | 5 to 9 mph W | 7% |
| Sunday Night | 39°F | Partly Cloudy then Slight Chance Light Rain | 9 mph W | 21% |
| Monday | 59°F | Slight Chance Light Rain | 9 to 16 mph NW | 23% |
| Monday Night | 38°F | Slight Chance Light Rain | 6 to 10 mph W | 23% |
| Tuesday | 63°F | Sunny | 7 to 15 mph W | 9% |
Forecast source: National Weather Service (api.weather.gov) for Mount Aetna (39.599, -77.613). Updated through the day.
Growing snapshot for Mount Aetna
Last spring frost
Apr 25
First fall frost
Oct 19
Growing season
176 days
Hardiness zone
7a
More local growing data for Mount Aetna: nearby ZIP 21783 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Smithsburg 2Nw, Md (1.8 mi from Mount Aetna). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.