Washington Grove, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Washington Grove, a town in Montgomery County, Maryland.
This Afternoon
83°F
Mostly Sunny
Mostly sunny, with a high near 83. North wind around 10 mph.
7-day forecast for Washington Grove
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 83°F | Mostly Sunny | 10 mph N | 10% |
| Tonight | 59°F | Partly Cloudy | 9 mph N | 10% |
| Saturday | 77°F | Partly Sunny | 9 mph E | 5% |
| Saturday Night | 66°F | Mostly Cloudy then Isolated Rain Showers | 9 mph SE | 20% |
| Sunday | 81°F | Rain Showers Likely | 8 to 13 mph S | 55% |
| Sunday Night | 64°F | Showers And Thunderstorms Likely | 5 to 9 mph W | 69% |
| Monday | 73°F | Chance Rain Showers | 8 to 12 mph NE | 41% |
| Monday Night | 59°F | Chance Rain Showers | 7 to 10 mph NE | 54% |
| Tuesday | 64°F | Rain Showers Likely | 13 mph NE | 58% |
| Tuesday Night | 54°F | Rain Showers Likely | 13 mph NE | 58% |
| Wednesday | 61°F | Chance Rain Showers | 13 mph NE | 50% |
| Wednesday Night | 54°F | Chance Showers And Thunderstorms | 8 to 12 mph NE | 50% |
| Thursday | 63°F | Chance Showers And Thunderstorms | 12 mph NE | 47% |
| Thursday Night | 54°F | Chance Showers And Thunderstorms | 5 to 8 mph N | 35% |
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 Sep 18, 2026.