North Potomac, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for North Potomac, a community in Montgomery County, Maryland.
Today
86°F
Chance Showers And Thunderstorms
A chance of showers and thunderstorms before 2pm, then a chance of showers and thunderstorms. Partly sunny, with a high near 86. Southeast wind 3 to 7 mph. Chance of precipitation is 40%. New rainfall amounts between a quarter and half of an inch possible.
7-day forecast for North Potomac
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 86°F | Chance Showers And Thunderstorms | 3 to 7 mph SE | 42% |
| Tonight | 72°F | Chance Showers And Thunderstorms then Partly Cloudy | 6 mph S | 33% |
| Thursday | 90°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph SW | 40% |
| Thursday Night | 72°F | Chance Showers And Thunderstorms | 2 to 8 mph SW | 44% |
| Friday | 90°F | Mostly Sunny then Showers And Thunderstorms Likely | 2 to 7 mph SW | 60% |
| Friday Night | 71°F | Showers And Thunderstorms Likely | 1 to 6 mph SW | 60% |
| Saturday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 1 to 7 mph SW | 40% |
| Saturday Night | 71°F | Chance Showers And Thunderstorms | 1 to 6 mph W | 40% |
| Sunday | 90°F | Mostly Sunny | 2 to 7 mph W | 8% |
| Sunday Night | 71°F | Mostly Clear | 1 to 5 mph W | 8% |
| Monday | 92°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 1 to 8 mph W | 16% |
| Monday Night | 73°F | Slight Chance Showers And Thunderstorms | 2 to 7 mph SW | 17% |
| Tuesday | 91°F | Mostly Sunny then Chance Showers And Thunderstorms | 2 to 10 mph W | 32% |
| Tuesday Night | 71°F | Chance Showers And Thunderstorms | 5 to 9 mph NW | 32% |
Forecast source: National Weather Service (api.weather.gov) for North Potomac (39.097, -77.239). Updated through the day.
Growing snapshot for North Potomac
Last spring frost
Apr 1
First fall frost
Nov 6
Growing season
219 days
Hardiness zone
7b
More local growing data for North Potomac: nearby ZIP 20878 weather · frost dates · planting calendar · Maryland frost dates
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Climate data from the nearest NOAA station, Rockville 1 Ne, Md (5.5 mi from North Potomac). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 5, 2026.