Mount Briar, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Briar, a community in Washington County, Maryland.
Today
85°F
Partly Sunny
Partly sunny, with a high near 85. East wind 2 to 6 mph.
7-day forecast for Mount Briar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 85°F | Partly Sunny | 2 to 6 mph E | 0% |
| Tonight | 68°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 2 to 6 mph SE | 33% |
| Wednesday | 84°F | Rain Showers Likely then Chance Showers And Thunderstorms | 3 to 7 mph SE | 70% |
| Wednesday Night | 70°F | Chance Showers And Thunderstorms | 6 mph S | 48% |
| Thursday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 8 mph S | 48% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 1 to 7 mph S | 48% |
| Friday | 88°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 6 mph SW | 54% |
| Friday Night | 69°F | Chance Showers And Thunderstorms | 1 to 5 mph SW | 54% |
| Saturday | 87°F | Partly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph W | 47% |
| Saturday Night | 68°F | Chance Showers And Thunderstorms | 1 to 6 mph SW | 47% |
| Sunday | 89°F | Mostly Sunny | 1 to 6 mph W | 14% |
| Sunday Night | 70°F | Partly Cloudy | 1 to 6 mph SW | 14% |
| Monday | 91°F | Mostly Sunny | 2 to 10 mph W | 14% |
| Monday Night | 70°F | Partly Cloudy | 3 to 9 mph W | 14% |
Forecast source: National Weather Service (api.weather.gov) for Mount Briar (39.443, -77.687). Updated through the day.
Growing snapshot for Mount Briar
Last spring frost
Apr 26
First fall frost
Oct 18
Growing season
175 days
Hardiness zone
7a
More local growing data for Mount Briar: nearby ZIP 21756 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 (4.5 mi from Mount Briar). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.