National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Baltimore / Martin (KMTN)

Lat: 39.33°NLon: 76.42°WElev: 23ft.

Partly Cloudy

62°F

17°C

Humidity 57%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 10 Mar 10:35 pm EDT
Extended Forecast for

Glen Arm MD

  • Tonight

    Tonight: Partly cloudy, with a low around 52. South wind 3 to 5 mph.

    Low: 52 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 74. South wind 5 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 74 °F

    Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers after 2am. Low around 44. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 44 °F

    Chance
    T-storms then
    Showers

  • Thursday

    Thursday: Rain showers before 5pm, then a slight chance of rain and snow showers. High near 53. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.

    High: 53 °F

    Showers and
    Breezy then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. Northwest wind 5 to 8 mph becoming calm after midnight.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 50. Breezy.

    High: 50 °F

    Partly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 38.

    Low: 38 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 52. South wind 3 to 5 mph.
Wednesday
A chance of showers and thunderstorms before 4pm, then showers likely and possibly a thunderstorm between 4pm and 5pm, then a chance of showers and thunderstorms after 5pm. Mostly cloudy, with a high near 74. South wind 5 to 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday Night
A chance of showers and thunderstorms, then showers after 2am. Low around 44. South wind 10 to 15 mph becoming west after midnight. Winds could gust as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday
Rain showers before 5pm, then a slight chance of rain and snow showers. High near 53. Breezy, with a northwest wind 16 to 21 mph, with gusts as high as 37 mph. Chance of precipitation is 80%. Little or no snow accumulation expected.
Thursday Night
Mostly clear, with a low around 31. Northwest wind 5 to 8 mph becoming calm after midnight.
Friday
Partly sunny, with a high near 50. Breezy.
Friday Night
Partly cloudy, with a low around 38.
Saturday
Mostly sunny, with a high near 52.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
Mostly cloudy, with a high near 60.
Sunday Night
Showers. Low around 48. Chance of precipitation is 80%.
Monday
Showers. High near 58. Chance of precipitation is 80%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Glen Arm MD
 39.44°N 76.5°W (Elev. 381 ft)
Last Update:
10:01 pm EDT Mar 10, 2026
Forecast Valid:
10pm EDT Mar 10, 2026-6pm EDT Mar 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation