Harman US

Preston, MD Weather & Growing Conditions

Overnight
64°F
Mostly Cloudy
Mostly cloudy, with a low around 64. Northeast wind around 5 mph.

7-day forecast

WhenTempForecastWindPrecip
Overnight 64°F Mostly Cloudy 5 mph NE 2%
Saturday 79°F Mostly Sunny 5 to 10 mph NE 10%
Saturday Night 66°F Patchy Fog 5 to 10 mph E 1%
Sunday 82°F Patchy Fog then Mostly Sunny 5 to 10 mph S 11%
Sunday Night 67°F Showers And Thunderstorms Likely 5 to 10 mph SW 62%
Monday 75°F Chance Showers And Thunderstorms 5 to 10 mph N 48%
Monday Night 64°F Chance Rain Showers 5 to 10 mph NE 42%
Tuesday 70°F Chance Rain Showers 10 to 15 mph NE 48%
Tuesday Night 60°F Chance Rain Showers 10 to 15 mph NE 48%
Wednesday 66°F Chance Rain Showers 15 mph NE 43%
Wednesday Night 59°F Chance Showers And Thunderstorms 10 to 15 mph NE 43%
Thursday 67°F Chance Showers And Thunderstorms 10 to 15 mph NE 34%
Thursday Night 56°F Chance Showers And Thunderstorms 5 to 10 mph N 34%
Friday 70°F Chance Rain Showers 5 to 10 mph N 26%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Preston, MD

Last spring frost
Apr 1
First fall frost
Nov 7
Growing season
220 days
Hardiness zone
7b

Explore more for Preston, MD: full frost dates · planting calendar · Maryland frost dates

Climate data from the nearest NOAA station, Royal Oak 2 Ssw, Md (15.1 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.