Antietam, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Antietam, a community in Washington County, Maryland.
Overnight
57°F
Partly Cloudy
Partly cloudy, with a low around 57. Northeast wind around 6 mph.
7-day forecast for Antietam
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 57°F | Partly Cloudy | 6 mph NE | 0% |
| Saturday | 78°F | Partly Sunny | 2 to 6 mph NE | 11% |
| Saturday Night | 64°F | Slight Chance Rain Showers | 5 to 12 mph SE | 18% |
| Sunday | 83°F | Chance Rain Showers | 5 to 12 mph S | 51% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 10 mph NW | 74% |
| Monday | 69°F | Chance Rain Showers | 7 to 10 mph NE | 43% |
| Monday Night | 53°F | Rain Showers Likely | 5 to 9 mph NE | 55% |
| Tuesday | 62°F | Rain Showers Likely | 10 mph NE | 69% |
| Tuesday Night | 50°F | Rain Showers Likely | 9 to 13 mph NE | 69% |
| Wednesday | 60°F | Chance Rain Showers | 13 mph NE | 54% |
| Wednesday Night | 51°F | Chance Rain Showers | 10 mph NE | 44% |
| Thursday | 62°F | Chance Rain Showers | 10 mph NE | 42% |
| Thursday Night | 50°F | Chance Showers And Thunderstorms | 5 to 8 mph N | 39% |
| Friday | 67°F | Slight Chance Rain Showers | 9 mph N | 22% |
Forecast source: National Weather Service (api.weather.gov) for Antietam (39.415, -77.736). Updated through the day.
Growing snapshot for Antietam
Last spring frost
Apr 26
First fall frost
Oct 18
Growing season
175 days
Hardiness zone
7a
More local growing data for Antietam: nearby ZIP 21782 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Bakersville
Beaver Creek
Big Pool
Big Spring
Boonsboro
Breathedsville
Brownsville
Cavetown
Cearfoss
Charlton
Chewsville
Clear Spring
Dargan
Downsville
Eakles Mill
Edgemont
Ernstville
Fairplay
Fairview
Fort Ritchie
Fountainhead-Orchard Hills
Funkstown
Gapland
Greensburg
Hagerstown
Halfway
Hancock
Highfield-Cascade
Indian Springs
Jugtown
Climate data from the nearest NOAA station, Sharpsburg 5 S, Md (4.5 mi from Antietam). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.