Brunswick, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brunswick, a city in Frederick County, Maryland.
Overnight
50°F
Mostly Clear
Mostly clear, with a low around 50. Southeast wind around 3 mph.
7-day forecast for Brunswick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 50°F | Mostly Clear | 3 mph SE | 1% |
| Wednesday | 74°F | Mostly Sunny | 3 to 13 mph SE | 1% |
| Wednesday Night | 61°F | Mostly Cloudy then Rain Showers Likely | 5 to 9 mph S | 72% |
| Thursday | 75°F | Rain Showers Likely | 7 to 10 mph S | 57% |
| Thursday Night | 59°F | Chance Rain Showers then Areas Of Fog | 0 to 5 mph W | 45% |
| Friday | 70°F | Chance Light Rain | 3 mph N | 47% |
| Friday Night | 48°F | Slight Chance Light Rain then Partly Cloudy | 1 to 7 mph NW | 20% |
| Saturday | 64°F | Mostly Sunny | 7 to 16 mph NW | 8% |
| Saturday Night | 40°F | Partly Cloudy | 8 to 12 mph NW | 7% |
| Sunday | 61°F | Mostly Sunny | 8 to 13 mph NW | 2% |
| Sunday Night | 39°F | Mostly Clear | 5 to 9 mph W | 5% |
| Monday | 61°F | Sunny | 9 to 16 mph W | 5% |
| Monday Night | 37°F | Mostly Clear | 1 to 7 mph W | 5% |
| Tuesday | 64°F | Sunny | 3 to 12 mph W | 2% |
Forecast source: National Weather Service (api.weather.gov) for Brunswick (39.318, -77.625). Updated through the day.
Growing snapshot for Brunswick
Last spring frost
Apr 26
First fall frost
Oct 18
Growing season
175 days
Hardiness zone
7a
More local growing data for Brunswick: nearby ZIP 21716 weather · frost dates · planting calendar · Maryland frost dates
Nearby towns & communities
Adamstown
Bagtown
Ballenger Creek
Bartonsville
Braddock Heights
Buckeystown
Burkittsville
Emmitsburg
Frederick
Garretts Mill
Graceham
Green Valley
Jefferson
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, Sharpsburg 5 S, Md (7.5 mi from Brunswick). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.