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

Hazardous Weather Conditions

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Thunderstorm Rain

85°F

29°C

Humidity 82%
Wind Speed W 7 mph
Barometer 30.02 in (1017.4 mb)
Dewpoint 79°F (26°C)
Visibility 6.00 mi
Heat Index98°F (37°C)
Last update 14 Jul 4:56 pm EDT
Extended Forecast for

2 Miles SW Lisbon MD

Flood Watch July 14, 05:29pm until July 15, 12:00am
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch July 14, 05:29pm until July 15, 12:00am

    NOW until 12:00am Tue

    Flood Watch

  • This Afternoon

    High: 85 °F

    T-storms

  • Tonight

    Tonight: Showers and thunderstorms before 2am, then a slight chance of showers. Patchy fog after midnight. Low around 71. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 71 °F

    T-storms then
    Slight Chance
    T-storms and
    Patchy Fog

  • Tuesday

    Tuesday: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 86. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Slight Chance
    T-storms and
    Patchy Fog
    then Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Mostly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.

    Low: 72 °F

    Chance
    T-storms then
    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 88. South wind 3 to 6 mph. Chance of precipitation is 70%.

    High: 88 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 60%.

    Low: 73 °F

    Showers
    Likely then
    Chance
    T-storms

  • Thursday

    Thursday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 40%.

    High: 92 °F

    Mostly Sunny
    then Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.

    Low: 73 °F

    Chance
    T-storms then
    Partly Cloudy

Detailed Forecast

This Afternoon
Showers and possibly a thunderstorm. High near 85. Light southeast wind. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers and thunderstorms before 2am, then a slight chance of showers. Patchy fog after midnight. Low around 71. Calm wind. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before 9am. Otherwise, partly sunny, with a high near 86. Calm wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
A chance of showers and thunderstorms before 11pm, then a slight chance of showers. Mostly cloudy, with a low around 72. Calm wind. Chance of precipitation is 30%.
Wednesday
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 88. South wind 3 to 6 mph. Chance of precipitation is 70%.
Wednesday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 60%.
Thursday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 70. Chance of precipitation is 30%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SW Lisbon MD
 39.32°N 77.09°W (Elev. 623 ft)
Last Update:
4:30 pm EDT Jul 14, 2025
Forecast Valid:
5pm EDT Jul 14, 2025-6pm EDT Jul 21, 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