Brunswick, MD Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Brunswick, a city in Frederick County, Maryland.
Overnight
62°F
Partly Cloudy
Partly cloudy, with a low around 62. North wind around 2 mph.
7-day forecast for Brunswick
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 62°F | Partly Cloudy | 2 mph N | 0% |
| Tuesday | 85°F | Mostly Sunny | 1 to 5 mph NE | 0% |
| Tuesday Night | 68°F | Mostly Cloudy then Slight Chance Showers And Thunderstorms | 1 to 6 mph E | 38% |
| Wednesday | 84°F | Rain Showers Likely | 2 to 6 mph E | 70% |
| Wednesday Night | 70°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 2 to 6 mph S | 55% |
| Thursday | 89°F | Mostly Sunny then Chance Showers And Thunderstorms | 5 to 9 mph S | 42% |
| Thursday Night | 70°F | Chance Showers And Thunderstorms | 1 to 8 mph SW | 42% |
| Friday | 89°F | Mostly Sunny then Showers And Thunderstorms Likely | 1 to 6 mph SW | 55% |
| Friday Night | 69°F | Showers And Thunderstorms Likely then Chance Showers And Thunderstorms | 0 to 5 mph SW | 55% |
| Saturday | 88°F | Partly Sunny then Chance Showers And Thunderstorms | 0 to 6 mph W | 50% |
| Saturday Night | 69°F | Chance Showers And Thunderstorms | 0 to 5 mph W | 50% |
| Sunday | 89°F | Mostly Sunny then Slight Chance Showers And Thunderstorms | 0 to 5 mph W | 16% |
| Sunday Night | 70°F | Slight Chance Showers And Thunderstorms then Partly Cloudy | 0 to 3 mph SW | 16% |
| Monday | 91°F | Mostly Sunny | 1 to 9 mph W | 13% |
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 Aug 4, 2026.