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.

Fair

32°F

0°C

Humidity 64%
Wind Speed Calm
Barometer 30.30 in
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 12 Jan 5:54 am EST
Extended Forecast for

Glen Arm MD

  • Today

    Today: Sunny, with a high near 43. West wind 7 to 10 mph, with gusts as high as 21 mph.

    High: 43 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 28. Southwest wind around 5 mph becoming calm in the evening.

    Low: 28 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 46. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 46 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 36. Southwest wind around 7 mph.

    Low: 36 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain. Mostly cloudy, with a high near 49. Southwest wind around 6 mph. Chance of precipitation is 40%.

    High: 49 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 60%.

    Low: 34 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely before 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 60%.

    High: 38 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday Night

    Thursday Night: A chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.

    Low: 20 °F

    Chance Snow

  • Friday

    Friday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 43. West wind 7 to 10 mph, with gusts as high as 21 mph.
Tonight
Mostly clear, with a low around 28. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 46. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 36. Southwest wind around 7 mph.
Wednesday
A chance of rain. Mostly cloudy, with a high near 49. Southwest wind around 6 mph. Chance of precipitation is 40%.
Wednesday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 34. Chance of precipitation is 60%.
Thursday
Rain likely before 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 38. Chance of precipitation is 60%.
Thursday Night
A chance of snow. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 32.
Friday Night
Mostly clear, with a low around 22.
Saturday
Mostly sunny, with a high near 39.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
A chance of snow. Mostly sunny, with a high near 32. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Glen Arm MD
 39.44°N 76.5°W (Elev. 381 ft)
Last Update:
3:53 am EST Jan 12, 2026
Forecast Valid:
6am EST Jan 12, 2026-6pm EST Jan 18, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation