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

Heavy Rain and Flooding Threat in the Ohio Valley

Gulf moisture will combine with a cold front and will bring heavy rain and scattered flash flooding over parts of the Mid-South into the Ohio Valley through the morning and the Ohio Valley and Central Appalachians on Tuesday. Showers and thunderstorms, some severe, are expected over the Southern Rockies/Southern High Plains on Tuesday. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Fair

66°F

19°C

Humidity 100%
Wind Speed S 6 mph
Barometer 30.19 in (1023.2 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Last update 7 Oct 8:56 am EDT
Extended Forecast for

Dayton MD

  • Today

    Today: Partly sunny, with a high near 79. South wind 7 to 11 mph, with gusts as high as 23 mph.

    High: 79 °F

    Partly Sunny

  • Tonight

    Tonight: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 61. South wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 61 °F

    Chance
    Showers then
    Showers

  • Wednesday

    Wednesday: Showers and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm. High near 68. North wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 68 °F

    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 43. North wind around 8 mph, with gusts as high as 18 mph.

    Low: 43 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 60. Northeast wind 7 to 9 mph.

    High: 60 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 39.

    Low: 39 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 66.

    High: 66 °F

    Partly Sunny

Detailed Forecast

Today
Partly sunny, with a high near 79. South wind 7 to 11 mph, with gusts as high as 23 mph.
Tonight
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 3am. Low around 61. South wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Wednesday
Showers and possibly a thunderstorm before 8am, then showers likely between 8am and 2pm. High near 68. North wind 7 to 13 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday Night
Mostly clear, with a low around 43. North wind around 8 mph, with gusts as high as 18 mph.
Thursday
Sunny, with a high near 60. Northeast wind 7 to 9 mph.
Thursday Night
Clear, with a low around 39.
Friday
Sunny, with a high near 63.
Friday Night
Partly cloudy, with a low around 46.
Saturday
Partly sunny, with a high near 66.
Saturday Night
Mostly cloudy, with a low around 49.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Partly cloudy, with a low around 49.
Columbus Day
Mostly sunny, with a high near 65.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Dayton MD
 39.22°N 77°W (Elev. 492 ft)
Last Update:
7:29 am EDT Oct 7, 2025
Forecast Valid:
9am EDT Oct 7, 2025-6pm EDT Oct 13, 2025
 
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