Boonsboro, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Boonsboro, a town in Washington County, Maryland.
This Afternoon
78°F
Mostly Cloudy
Mostly cloudy, with a high near 78. East wind around 5 mph.
7-day forecast for Boonsboro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 78°F | Mostly Cloudy | 5 mph E | 12% |
| Tonight | 64°F | Slight Chance Rain Showers | 6 to 13 mph SE | 24% |
| Sunday | 82°F | Chance Rain Showers | 6 to 13 mph S | 53% |
| Sunday Night | 59°F | Chance Showers And Thunderstorms then Showers And Thunderstorms | 3 to 12 mph NW | 78% |
| Monday | 68°F | Chance Rain Showers | 8 to 12 mph NE | 43% |
| Monday Night | 54°F | Rain Showers Likely | 6 to 10 mph NE | 55% |
| Tuesday | 61°F | Rain Showers Likely | 12 mph NE | 68% |
| Tuesday Night | 51°F | Rain Showers Likely | 14 mph NE | 68% |
| Wednesday | 59°F | Chance Rain Showers | 14 mph NE | 54% |
| Wednesday Night | 51°F | Chance Rain Showers | 14 mph NE | 43% |
| Thursday | 61°F | Chance Rain Showers | 10 to 14 mph NE | 42% |
| Thursday Night | 50°F | Chance Rain Showers | 6 to 9 mph NE | 38% |
| Friday | 66°F | Slight Chance Rain Showers | 10 mph N | 22% |
| Friday Night | 50°F | Slight Chance Rain Showers then Mostly Cloudy | 6 to 9 mph N | 15% |
Forecast source: National Weather Service (api.weather.gov) for Boonsboro (39.511, -77.665). Updated through the day.
Growing snapshot for Boonsboro
Last spring frost
Apr 11
First fall frost
Oct 28
Growing season
199 days
Hardiness zone
7a
More local growing data for Boonsboro: nearby ZIP 21713 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Hagerstown 1 E, Md (8.1 mi from Boonsboro). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.