Gaithersburg, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Gaithersburg, a city in Montgomery County, Maryland.
This Afternoon
77°F
Partly Sunny
Partly sunny, with a high near 77. Southeast wind around 7 mph.
7-day forecast for Gaithersburg
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 77°F | Partly Sunny | 7 mph SE | 6% |
| Tonight | 67°F | Mostly Cloudy | 9 mph SE | 14% |
| Sunday | 83°F | Chance Rain Showers | 8 to 12 mph S | 41% |
| Sunday Night | 61°F | Chance Showers And Thunderstorms then Showers And Thunderstorms Likely | 3 to 9 mph W | 64% |
| Monday | 72°F | Chance Rain Showers | 12 mph NE | 37% |
| Monday Night | 58°F | Chance Rain Showers | 7 to 10 mph NE | 48% |
| Tuesday | 66°F | Rain Showers Likely | 9 to 14 mph NE | 61% |
| Tuesday Night | 54°F | Showers And Thunderstorms Likely | 13 mph NE | 61% |
| Wednesday | 61°F | Chance Rain Showers | 13 mph NE | 50% |
| Wednesday Night | 54°F | Chance Rain Showers | 13 mph NE | 34% |
| Thursday | 61°F | Chance Rain Showers | 13 mph NE | 26% |
| Thursday Night | 51°F | Chance Rain Showers | 6 to 10 mph N | 25% |
| Friday | 66°F | Chance Rain Showers | 12 mph N | 25% |
| Friday Night | 52°F | Slight Chance Rain Showers | 6 to 10 mph N | 20% |
Forecast source: National Weather Service (api.weather.gov) for Gaithersburg (39.149, -77.195). Updated through the day.
Growing snapshot for Gaithersburg
Last spring frost
Apr 1
First fall frost
Nov 6
Growing season
219 days
Hardiness zone
7b
More local growing data for Gaithersburg: nearby ZIP 20877 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Rockville 1 Ne, Md (3.6 mi from Gaithersburg). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 20, 2026.