Washington Grove, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Washington Grove, a town in Montgomery County, Maryland.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. South wind 5 to 10 mph, with gusts as high as 18 mph.
7-day forecast for Washington Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 5 to 10 mph S | 1% |
| Tonight | 61°F | Mostly Cloudy then Chance Rain Showers | 8 mph S | 45% |
| Thursday | 74°F | Chance Rain Showers | 9 mph S | 49% |
| Thursday Night | 60°F | Chance Rain Showers | 2 to 6 mph SW | 52% |
| Friday | 69°F | Chance Light Rain | 5 mph N | 52% |
| Friday Night | 48°F | Chance Light Rain then Partly Cloudy | 2 to 6 mph NW | 31% |
| Saturday | 61°F | Mostly Sunny | 6 to 13 mph NW | 6% |
| Saturday Night | 40°F | Partly Cloudy | 7 to 10 mph NW | 6% |
| Sunday | 59°F | Mostly Sunny | 7 to 12 mph NW | 1% |
| Sunday Night | 39°F | Mostly Clear | 8 mph W | 5% |
| Monday | 60°F | Sunny | 8 to 15 mph W | 5% |
| Monday Night | 37°F | Mostly Clear | 2 to 8 mph W | 5% |
| Tuesday | 63°F | Sunny | 3 to 10 mph W | 3% |
| Tuesday Night | 40°F | Mostly Clear | 6 mph W | 0% |
Forecast source: National Weather Service (api.weather.gov) for Washington Grove (39.141, -77.175). Updated through the day.
Growing snapshot for Washington Grove
Last spring frost
Apr 1
First fall frost
Nov 6
Growing season
219 days
Hardiness zone
7b
More local growing data for Washington Grove: nearby ZIP 20880 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Rockville 1 Ne, Md (3.1 mi from Washington Grove). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.