Mount Briar, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mount Briar, a community in Washington County, Maryland.
Tonight
52°F
Mostly Clear
Mostly clear, with a low around 52. Southeast wind around 6 mph.
7-day forecast for Mount Briar
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 52°F | Mostly Clear | 6 mph SE | 1% |
| Wednesday | 74°F | Mostly Sunny | 5 to 14 mph S | 2% |
| Wednesday Night | 62°F | Mostly Cloudy then Light Rain | 12 mph S | 86% |
| Thursday | 74°F | Light Rain | 6 to 12 mph S | 77% |
| Thursday Night | 59°F | Chance Light Rain | 1 to 6 mph SW | 50% |
| Friday | 69°F | Chance Light Rain | 3 mph NW | 50% |
| Friday Night | 48°F | Chance Light Rain then Partly Cloudy | 1 to 5 mph NW | 43% |
| Saturday | 62°F | Mostly Sunny | 5 to 13 mph NW | 11% |
| Saturday Night | 39°F | Partly Cloudy | 5 to 9 mph NW | 11% |
| Sunday | 60°F | Mostly Sunny | 5 to 9 mph W | 6% |
| Sunday Night | 38°F | Partly Cloudy then Slight Chance Light Rain | 8 mph W | 20% |
| Monday | 59°F | Slight Chance Light Rain | 8 to 16 mph NW | 22% |
| Monday Night | 36°F | Slight Chance Light Rain | 5 to 8 mph W | 22% |
| Tuesday | 63°F | Mostly Sunny | 6 to 15 mph W | 9% |
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 Nov 4, 2026.