Harman US

National, MD Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for National, a community in Allegany County, Maryland.

Today
74°F
Mostly Cloudy
Mostly cloudy, with a high near 74. East wind around 7 mph.

7-day forecast for National

WhenTempForecastWindPrecip
Today 74°F Mostly Cloudy 7 mph E 7%
Tonight 60°F Mostly Cloudy then Patchy Fog 3 to 7 mph SE 19%
Sunday 80°F Rain Showers then Chance Showers And Thunderstorms 5 to 10 mph SW 76%
Sunday Night 55°F Chance Showers And Thunderstorms then Showers And Thunderstorms 7 mph N 81%
Monday 65°F Chance Rain Showers 8 mph NE 48%
Monday Night 51°F Rain Showers Likely 7 to 10 mph E 72%
Tuesday 59°F Showers And Thunderstorms 12 mph E 79%
Tuesday Night 48°F Rain Showers 12 to 16 mph E 75%
Wednesday 55°F Rain Showers Likely 10 to 15 mph E 63%
Wednesday Night 48°F Rain Showers Likely 13 mph E 60%
Thursday 59°F Rain Showers Likely 7 to 10 mph E 57%
Thursday Night 48°F Chance Showers And Thunderstorms 7 mph NE 41%
Friday 65°F Chance Rain Showers 8 mph N 31%
Friday Night 48°F Chance Rain Showers 8 mph N 31%

Forecast source: National Weather Service (api.weather.gov) for National (39.612, -78.940). Updated through the day.

Growing snapshot for National

Last spring frost
Apr 29
First fall frost
Oct 18
Growing season
171 days
Hardiness zone
6b

More local growing data for National: nearby ZIP 21542 weather · frost dates · planting calendar · Maryland frost dates

Nearby towns & communities

All Maryland locations ›

Climate data from the nearest NOAA station, Frostburg 2, Md (4.8 mi from National). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.