Garretts Mill, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Garretts Mill, a community in Frederick County, Maryland.
Today
85°F
Mostly Sunny
Mostly sunny, with a high near 85. Northeast wind around 5 mph.
7-day forecast for Garretts Mill
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Mostly Sunny | 5 mph NE | 0% |
| Tonight | 68°F | Slight Chance Rain Showers then Slight Chance Showers And Thunderstorms | 2 to 6 mph E | 37% |
| Wednesday | 84°F | Rain Showers Likely then Chance Showers And Thunderstorms | 6 mph SE | 67% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 6 mph S | 49% |
| Thursday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 8 mph S | 45% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 2 to 7 mph S | 45% |
| Friday | 89°F | Mostly Sunny then Showers And Thunderstorms Likely | 2 to 6 mph SW | 56% |
| Friday Night | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 1 to 5 mph SW | 56% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 1 to 6 mph W | 51% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 51% |
| Sunday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 2 to 6 mph W | 15% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 1 to 5 mph SW | 15% |
| Monday | 91°F | Mostly Sunny | 2 to 9 mph W | 13% |
| Monday Night | 70°F | Partly Cloudy | 3 to 8 mph W | 13% |
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
Nearby towns & communities
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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 Aug 4, 2026.