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

Frederick Municipal Airport (KFDK)

Lat: 39.42°NLon: 77.37°WElev: 269ft.

A Few Clouds

86°F

30°C

Humidity 38%
Wind Speed S 10 mph
Barometer 29.74 in
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 17 Jun 5:47 pm EDT
Extended Forecast for

Frederick MD

  • Tonight

    Tonight: Increasing clouds, with a low around 69. South wind 5 to 8 mph becoming calm.

    Low: 69 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A chance of showers and thunderstorms, mainly between 1pm and 2pm. Partly sunny, with a high near 91. Breezy, with a west wind 11 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.

    High: 91 °F

    Slight Chance
    T-storms then
    Chance
    Showers and
    Breezy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 66. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.

    Low: 66 °F

    Mostly Cloudy

  • Juneteenth

    Juneteenth: Mostly cloudy, then gradually becoming sunny, with a high near 84. West wind 5 to 10 mph, with gusts as high as 20 mph.

    High: 84 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. Northwest wind 5 to 7 mph becoming calm in the evening.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83.

    High: 83 °F

    Sunny

  • Saturday Night

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

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 64. Chance of precipitation is 50%.

    Low: 64 °F

    Chance
    Showers

Detailed Forecast

Tonight
Increasing clouds, with a low around 69. South wind 5 to 8 mph becoming calm.
Thursday
A chance of showers and thunderstorms, mainly between 1pm and 2pm. Partly sunny, with a high near 91. Breezy, with a west wind 11 to 21 mph, with gusts as high as 32 mph. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 66. West wind 5 to 9 mph becoming calm after midnight. Winds could gust as high as 20 mph.
Juneteenth
Mostly cloudy, then gradually becoming sunny, with a high near 84. West wind 5 to 10 mph, with gusts as high as 20 mph.
Friday Night
Mostly clear, with a low around 62. Northwest wind 5 to 7 mph becoming calm in the evening.
Saturday
Sunny, with a high near 83.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Mostly 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 50%.
Monday
Showers, with thunderstorms also possible after 2pm. High near 84. Chance of precipitation is 80%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 62. Chance of precipitation is 60%.
Tuesday
Sunny, with a high near 83.
Tuesday Night
Mostly clear, with a low around 61.
Wednesday
Mostly sunny, with a high near 84.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Frederick MD
 39.42°N 77.4°W (Elev. 299 ft)
Last Update:
4:53 pm EDT Jun 17, 2026
Forecast Valid:
6pm EDT Jun 17, 2026-6pm EDT Jun 24, 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