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

Areas of Dangerous Heat and Severe Thunderstorms

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week before returning over much of the Plains into next week. Scattered strong to severe thunderstorms are possible across parts of the Northeast U.S. on Thursday. Damaging wind, hail, and a tornado or two are possible. Read More >

Current conditions at

Frederick Municipal Airport (KFDK)

Lat: 39.42°NLon: 77.37°WElev: 269ft.

Fair

67°F

19°C

Humidity 97%
Wind Speed Calm
Barometer 30.03 in
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Last update 26 Aug 11:35 pm EDT
Extended Forecast for

Green Valley MD

  • Tonight

    Tonight: Mostly cloudy, with a low around 68. South wind around 8 mph.

    Low: 68 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Mostly sunny, with a high near 86. South wind 6 to 8 mph. Chance of precipitation is 50%.

    High: 86 °F

    Mostly Sunny
    then Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Some of the storms could be severe. Patchy fog after 11pm. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 66. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Friday

    Friday: Mostly cloudy through mid morning, then becoming sunny, with a high near 83. Light north wind.

    High: 83 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64. Calm wind.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 68.

    Low: 68 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 68. South wind around 8 mph.
Thursday
A slight chance of showers and thunderstorms before 7am, then a chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Mostly sunny, with a high near 86. South wind 6 to 8 mph. Chance of precipitation is 50%.
Thursday Night
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Some of the storms could be severe. Patchy fog after 11pm. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 66. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly cloudy through mid morning, then becoming sunny, with a high near 83. Light north wind.
Friday Night
Partly cloudy, with a low around 64. Calm wind.
Saturday
Mostly sunny, with a high near 83.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 89.
Monday Night
Partly cloudy, with a low around 70.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 20%.
Wednesday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Green Valley MD
 39.33°N 77.24°W (Elev. 607 ft)
Last Update:
10:51 pm EDT Aug 26, 2026
Forecast Valid:
11pm EDT Aug 26, 2026-6pm EDT Sep 2, 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