Dangerous Heat Wave Continues; Severe Thunderstorms and Heavy Rain from the Central Plains to the Midwest

A prolonged, dangerous heat wave will continue today in the Midwest and Mississippi Valley, and persist through the Independence Day weekend across the Ohio Valley, Mid-South, and East Coast. Severe thunderstorm are expected from the northern/central Plains to the Mid-Atlantic. Isolated slash flooding is possible from the central Plains to the Upper Midwest. Read More >

Current conditions at

Frederick Municipal Airport (KFDK)

Lat: 39.42°NLon: 77.37°WElev: 269ft.

Fair

82°F

28°C

Humidity 83%
Wind Speed S 3 mph
Barometer 30.02 in
Dewpoint 76°F (24°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 3 Jul 11:55 pm EDT
Extended Forecast for

Frederick MD

Extreme Heat Warning July 4, 10:00am until July 4, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
  • Overnight

    Overnight: Mostly clear, with a low around 78. Light and variable wind.

    Low: 78 °F

    Mostly Clear

  • Independence Day

    Independence Day: A slight chance of showers and thunderstorms between 2pm and 3pm.  Sunny and hot, with a high near 100. Heat index values as high as 106. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph.  Chance of precipitation is 20%.

    High: 100 °F

    Sunny then
    Slight Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 2am.  Mostly cloudy, with a low around 73. Light and variable wind.  Chance of precipitation is 40%.

    Low: 73 °F

    Chance
    T-storms

  • Sunday

    Sunday: Showers and possibly a thunderstorm after 2pm.  High near 93. Heat index values as high as 103. Light and variable wind.  Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 93 °F

    Mostly Sunny
    then Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers.  Low around 71. Calm wind.  Chance of precipitation is 80%.

    Low: 71 °F

    Showers

  • Monday

    Monday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm.  High near 85. Chance of precipitation is 80%.

    High: 85 °F

    Chance
    Showers then
    T-storms

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a slight chance of showers.  Low around 70. Chance of precipitation is 80%.

    Low: 70 °F

    T-storms then
    Showers
    Likely

  • Tuesday

    Tuesday: A slight chance of showers, then a chance of showers and thunderstorms after 8am.  Partly sunny, with a high near 86. Chance of precipitation is 50%.

    High: 86 °F

    Slight Chance
    T-storms then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 2am, then a slight chance of showers.  Mostly cloudy, with a low around 69. Chance of precipitation is 40%.

    Low: 69 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 78. Light and variable wind.
Independence Day
A slight chance of showers and thunderstorms between 2pm and 3pm. Sunny and hot, with a high near 100. Heat index values as high as 106. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 73. Light and variable wind. Chance of precipitation is 40%.
Sunday
Showers and possibly a thunderstorm after 2pm. High near 93. Heat index values as high as 103. Light and variable wind. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 71. Calm wind. Chance of precipitation is 80%.
Monday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 85. Chance of precipitation is 80%.
Monday Night
Showers and possibly a thunderstorm before 2am, then a slight chance of showers. Low around 70. Chance of precipitation is 80%.
Tuesday
A slight chance of showers, then a chance of showers and thunderstorms after 8am. Partly sunny, with a high near 86. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 69. Chance of precipitation is 40%.
Wednesday
A chance of showers, mainly after 8am. Partly sunny, with a high near 87. Chance of precipitation is 30%.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 70. Chance of precipitation is 20%.
Thursday
A slight chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 20%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 71. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Frederick MD
 39.42°N 77.42°W (Elev. 305 ft)
10:53 pm EDT Jul 3, 2026
12am EDT Jul 4, 2026-6pm EDT Jul 10, 2026
 
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