Jefferson, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Jefferson, a community in Frederick County, Maryland.
Today
77°F
Partly Sunny
Partly sunny, with a high near 77. East wind around 5 mph.
7-day forecast for Jefferson
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 77°F | Partly Sunny | 5 mph E | 11% |
| Tonight | 64°F | Mostly Cloudy then Slight Chance Rain Showers | 5 to 10 mph SE | 18% |
| Sunday | 82°F | Rain Showers Likely | 6 to 12 mph S | 55% |
| Sunday Night | 59°F | Showers And Thunderstorms Likely | 3 to 10 mph NW | 73% |
| Monday | 68°F | Chance Rain Showers | 10 mph NE | 41% |
| Monday Night | 54°F | Chance Rain Showers | 6 to 9 mph NE | 52% |
| Tuesday | 62°F | Rain Showers Likely | 12 mph NE | 67% |
| Tuesday Night | 51°F | Rain Showers Likely | 12 to 15 mph NE | 67% |
| Wednesday | 59°F | Chance Rain Showers | 15 mph NE | 52% |
| Wednesday Night | 51°F | Chance Showers And Thunderstorms | 14 mph NE | 45% |
| Thursday | 61°F | Chance Showers And Thunderstorms | 10 to 14 mph NE | 44% |
| Thursday Night | 50°F | Chance Rain Showers | 6 to 10 mph N | 38% |
| Friday | 66°F | Slight Chance Rain Showers | 10 mph N | 20% |
| Friday Night | 50°F | Slight Chance Rain Showers | 6 to 9 mph N | 15% |
Forecast source: National Weather Service (api.weather.gov) for Jefferson (39.365, -77.541). Updated through the day.
Growing snapshot for Jefferson
Last spring frost
Apr 2
First fall frost
Nov 6
Growing season
218 days
Hardiness zone
7b
More local growing data for Jefferson: nearby ZIP 21755 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Adamstown
Bagtown
Ballenger Creek
Bartonsville
Braddock Heights
Brunswick
Buckeystown
Burkittsville
Emmitsburg
Frederick
Garretts Mill
Graceham
Green Valley
Lewistown
Libertytown
Linganore
Middletown
Monrovia
Mount Airy
Myersville
New Market
Point of Rocks
Rosemont
Sabillasville
Sandy Hook
Spring Ridge
Thurmont
Union Bridge
Urbana
Walkersville
Climate data from the nearest NOAA station, Frederick Police Brks, Md (7.9 mi from Jefferson). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.