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

Excessive Rainfall and Tropical Storm in the South; Severe Thunderstorms in the Midwest

Excessive rainfall may produce considerable, potentially life-threatening, flooding across the lower Mississippi River Valley and central Great Lakes region through tonight. Tropical Storm Arthur will move northeastward along the Texas coast today and then move inland over southwestern Louisiana by tonight. An outbreak of severe thunderstorms is expected across portions of Illinois and Indiana. Read More >

Current conditions at

Gaithersburg - Montgomery County Airport (KGAI)

Lat: 39.17°NLon: 77.17°WElev: 495ft.

Mostly Cloudy

84°F

29°C

Humidity 43%
Wind Speed W 8 mph
Barometer 29.80 in (1009.9 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 17 Jun 1:56 pm EDT
Extended Forecast for

Germantown MD

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 86. Southwest wind around 8 mph, with gusts as high as 20 mph.

    High: 86 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 70. South wind 3 to 8 mph. Winds could gust as high as 20 mph.

    Low: 70 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 91. South wind 13 to 15 mph becoming west in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 40%.

    High: 91 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 67. Northwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 67 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Juneteenth

    Juneteenth: Mostly sunny, with a high near 83. Northwest wind 6 to 11 mph, with gusts as high as 22 mph.

    High: 83 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 86. Southwest wind around 8 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 70. South wind 3 to 8 mph. Winds could gust as high as 20 mph.
Thursday
A chance of showers and thunderstorms, mainly between 4pm and 5pm. Partly sunny, with a high near 91. South wind 13 to 15 mph becoming west in the afternoon. Winds could gust as high as 28 mph. Chance of precipitation is 40%.
Thursday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 67. Northwest wind 5 to 10 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Juneteenth
Mostly sunny, with a high near 83. Northwest wind 6 to 11 mph, with gusts as high as 22 mph.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 86.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 85. Chance of precipitation is 70%.
Monday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Germantown MD
 39.18°N 77.26°W (Elev. 489 ft)
Last Update:
1:55 pm EDT Jun 17, 2026
Forecast Valid:
2pm EDT Jun 17, 2026-6pm EDT Jun 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