Garretts Mill, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Garretts Mill, a community in Frederick County, Maryland.
This Afternoon
71°F
Sunny
Sunny, with a high near 71. Southeast wind around 8 mph.
7-day forecast for Garretts Mill
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 71°F | Sunny | 8 mph SE | 2% |
| Tonight | 52°F | Mostly Clear | 7 mph SE | 2% |
| Wednesday | 75°F | Mostly Sunny | 6 to 14 mph S | 2% |
| Wednesday Night | 62°F | Mostly Cloudy then Light Rain | 8 to 12 mph SE | 84% |
| Thursday | 75°F | Light Rain Likely | 6 to 12 mph S | 74% |
| Thursday Night | 59°F | Chance Light Rain | 1 to 6 mph SW | 49% |
| Friday | 70°F | Chance Light Rain | 3 mph NW | 50% |
| Friday Night | 49°F | Chance Light Rain then Partly Cloudy | 1 to 5 mph NW | 43% |
| Saturday | 63°F | Mostly Sunny | 5 to 14 mph NW | 11% |
| Saturday Night | 41°F | Partly Cloudy | 5 to 9 mph NW | 11% |
| Sunday | 61°F | Mostly Sunny | 5 to 9 mph W | 7% |
| Sunday Night | 40°F | Partly Cloudy | 3 to 7 mph W | 14% |
| Monday | 60°F | Sunny | 7 to 15 mph W | 14% |
| Monday Night | 39°F | Mostly Clear | 3 to 7 mph W | 7% |
Forecast source: National Weather Service (api.weather.gov) for Garretts Mill (39.353, -77.689). Updated through the day.
Growing snapshot for Garretts Mill
Last spring frost
Apr 26
First fall frost
Oct 18
Growing season
175 days
Hardiness zone
7a
More local growing data for Garretts Mill: nearby ZIP 21758 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Sharpsburg 5 S, Md (4.6 mi from Garretts Mill). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.