Brunswick, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brunswick, a city in Frederick County, Maryland.
Tonight
66°F
Mostly Cloudy
Mostly cloudy, with a low around 66. Southeast wind 6 to 10 mph.
7-day forecast for Brunswick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 66°F | Mostly Cloudy | 6 to 10 mph SE | 14% |
| Sunday | 82°F | Rain Showers Likely | 8 to 12 mph S | 67% |
| Sunday Night | 61°F | Showers And Thunderstorms Likely | 2 to 7 mph NW | 57% |
| Monday | 70°F | Chance Rain Showers | 7 to 10 mph NE | 32% |
| Monday Night | 57°F | Rain Showers Likely | 6 to 9 mph NE | 56% |
| Tuesday | 64°F | Showers And Thunderstorms Likely | 8 to 13 mph NE | 71% |
| Tuesday Night | 52°F | Showers And Thunderstorms Likely | 12 mph NE | 71% |
| Wednesday | 58°F | Chance Rain Showers | 13 mph NE | 54% |
| Wednesday Night | 52°F | Chance Rain Showers | 9 to 13 mph NE | 38% |
| Thursday | 60°F | Chance Rain Showers | 9 to 13 mph NE | 25% |
| Thursday Night | 51°F | Chance Rain Showers | 6 to 9 mph N | 25% |
| Friday | 66°F | Chance Rain Showers | 12 mph N | 26% |
| Friday Night | 51°F | Chance Rain Showers | 7 to 13 mph N | 25% |
| Saturday | 70°F | Slight Chance Rain Showers | 14 mph N | 15% |
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 Sep 20, 2026.