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 >

Hazardous Weather Conditions

Current conditions at

Frederick Municipal Airport (KFDK)

Lat: 39.42°NLon: 77.37°WElev: 269ft.

Overcast

69°F

21°C

Humidity 98%
Wind Speed Calm
Barometer 30.00 in
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 27 Aug 4:55 am EDT
Extended Forecast for

Rosemont MD

  • Overnight

    Overnight: A slight chance of showers. Partly cloudy, with a low around 68. South wind around 6 mph. Chance of precipitation is 20%.

    Low: 68 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers before 2pm, then scattered showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. Mostly sunny, with a high near 88. South wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 88 °F

    Mostly Sunny
    then Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely before midnight, then isolated showers between midnight and 2am. Some of the storms could be severe. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 66. Light and variable 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: Patchy fog before 9am. Otherwise, partly sunny, with a high near 86. Light northwest wind.

    High: 86 °F

    Patchy Fog
    then Partly
    Sunny

  • Friday Night

    Friday Night: Patchy fog between 3am and 5am. Otherwise, partly cloudy, with a low around 65. Calm wind.

    Low: 65 °F

    Partly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 86.

    High: 86 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 3am. Otherwise, partly cloudy, with a low around 67.

    Low: 67 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 8am. Otherwise, sunny, with a high near 88.

    High: 88 °F

    Patchy Fog
    then Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

Detailed Forecast

Overnight
A slight chance of showers. Partly cloudy, with a low around 68. South wind around 6 mph. Chance of precipitation is 20%.
Thursday
A slight chance of showers before 2pm, then scattered showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Some of the storms could be severe. Mostly sunny, with a high near 88. South wind 3 to 7 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers and thunderstorms likely before midnight, then isolated showers between midnight and 2am. Some of the storms could be severe. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 66. Light and variable wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Patchy fog before 9am. Otherwise, partly sunny, with a high near 86. Light northwest wind.
Friday Night
Patchy fog between 3am and 5am. Otherwise, partly cloudy, with a low around 65. Calm wind.
Saturday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 86.
Saturday Night
Patchy fog after 3am. Otherwise, partly cloudy, with a low around 67.
Sunday
Patchy fog before 8am. Otherwise, sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 69.
Monday
Mostly sunny, with a high near 91.
Monday Night
Partly cloudy, with a low around 71.
Tuesday
Mostly sunny, with a high near 91.
Tuesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Rosemont MD
 39.33°N 77.61°W (Elev. 404 ft)
Last Update:
4:51 am EDT Aug 27, 2026
Forecast Valid:
5am EDT Aug 27, 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