Heavy Rain Threatens the Mid-Atlantic on Sunday While Fire Weather Conditions Worsen in the Southwest

Heavy rain is bringing a flash flood risk to parts of the Mid-Atlantic on Sunday. This activity will diminish overnight. On Monday, the focus shifts into the Plains and Mississippi Valley where severe thunderstorms and heavy rains will be possible through Tuesday. Meanwhile, hot conditions and Critical Fire Weather looms over the Great Basin and Southwest U.S. through midweek. Read More >

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Overcast

64°F

18°C

Humidity NA
Wind Speed Vrbl 5 mph
Barometer 30.10 in (1020.4 mb)
Dewpoint N/A
Visibility 8.00 mi
Last update 15 Jun 6:56 pm EDT
Extended Forecast for

Dayton MD

  • Tonight

    Tonight: Showers likely, mainly before midnight.  Patchy fog after 11pm.  Otherwise, cloudy, with a low around 62. East wind around 7 mph.  Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 62 °F

    Showers
    Likely and
    Patchy Fog

  • Monday

    Monday: A chance of showers, mainly before noon.  Patchy fog before 9am.  Otherwise, cloudy, with a high near 70. Northeast wind around 7 mph.  Chance of precipitation is 50%.

    High: 70 °F

    Chance
    Showers and
    Patchy Fog
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly after 2am.  Cloudy, with a low around 64. East wind around 5 mph becoming calm  in the evening.  Chance of precipitation is 30%.

    Low: 64 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm.  Cloudy, with a high near 79. South wind around 6 mph.  Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    Showers then
    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers.  Mostly cloudy, with a low around 70. Southeast wind 3 to 6 mph.  Chance of precipitation is 70%.

    Low: 70 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 2pm.  Mostly sunny, with a high near 87. Chance of precipitation is 40%.

    High: 87 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: A chance of showers and thunderstorms after 2pm.  Mostly sunny, with a high near 90. Chance of precipitation is 50%.

    High: 90 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm.  Partly cloudy, with a low around 66. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

Tonight
Showers likely, mainly before midnight. Patchy fog after 11pm. Otherwise, cloudy, with a low around 62. East wind around 7 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
A chance of showers, mainly before noon. Patchy fog before 9am. Otherwise, cloudy, with a high near 70. Northeast wind around 7 mph. Chance of precipitation is 50%.
Monday Night
A chance of showers, mainly after 2am. Cloudy, with a low around 64. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Tuesday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Cloudy, with a high near 79. South wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Showers likely and possibly a thunderstorm before 2am, then a slight chance of showers. Mostly cloudy, with a low around 70. Southeast wind 3 to 6 mph. Chance of precipitation is 70%.
Wednesday
A chance of showers, with thunderstorms also possible after 2pm. Mostly sunny, with a high near 87. Chance of precipitation is 40%.
Wednesday Night
Mostly clear, with a low around 72.
Juneteenth
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 90. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 66. Chance of precipitation is 30%.
Friday
Sunny, with a high near 83.
Friday Night
Partly cloudy, with a low around 63.
Saturday
Sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
Mostly sunny, with a high near 92.
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ABOUT THIS FORECAST

 
Point Forecast:
Dayton MD
 39.22°N 77°W (Elev. 492 ft)
4:29 pm EDT Jun 15, 2025
7pm EDT Jun 15, 2025-6pm EDT Jun 22, 2025
 
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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