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

Areas of Dangerous Heat and Heavy Rain with Possible Flooding into this Weekend

Hot temperatures and high humidity are forecast to continue across much of northeast Texas into the mid-Mississippi Valley into this weekend with heat advisories in effect. Heavy to excessive rainfall occurring at times through Saturday could bring areas of flooding across parts of the central Plains into the upper Midwest/Great Lakes, and Four Corners states. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

72°F

22°C

Humidity 84%
Wind Speed SE 5 mph
Barometer 30.32 in (1027.6 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 16 Sep 10:56 pm EDT
Extended Forecast for

Clarksville MD

  • Tonight

    Tonight: Partly cloudy, with a low around 65. Light south wind.

    Low: 65 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. South wind 3 to 7 mph. Chance of precipitation is 40%.

    High: 87 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 1am. Cloudy, then gradually becoming partly cloudy, with a low around 68. Light and variable wind. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 82. North wind 7 to 10 mph.

    High: 82 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59. Northeast wind around 7 mph.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 79.

    High: 79 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.

    High: 81 °F

    Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.

    Low: 63 °F

    Showers
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 65. Light south wind.
Thursday
A slight chance of showers between 11am and 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 87. South wind 3 to 7 mph. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 1am. Cloudy, then gradually becoming partly cloudy, with a low around 68. Light and variable wind. Chance of precipitation is 50%.
Friday
Mostly sunny, with a high near 82. North wind 7 to 10 mph.
Friday Night
Mostly clear, with a low around 59. Northeast wind around 7 mph.
Saturday
Mostly sunny, with a high near 79.
Saturday Night
Mostly cloudy, with a low around 63.
Sunday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 81. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm before 2am, then a chance of showers. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Monday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 40%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 61. Chance of precipitation is 50%.
Tuesday
A chance of showers and thunderstorms. Mostly cloudy, with a high near 71. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 70. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Clarksville MD
 39.22°N 76.97°W (Elev. 551 ft)
Last Update:
10:52 pm EDT Sep 16, 2026
Forecast Valid:
11pm EDT Sep 16, 2026-6pm EDT Sep 23, 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