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

Severe Weather and Heavy Rainfall from the Midwest to the Ohio Valley; Mid-Summer Heat Continues

Severe thunderstorm and heavy rainfall threats will persist from the Midwest to Lower Great Lakes through Monday, shifting into the Ohio Valley and Central Appalachians Monday evening into Tuesday. Mid-summer heat will continue across much of the CONUS this week, with record highs possible well into the 100s across the south-central High Plains. Read More >

Current conditions at

Harford County Airport (K0W3)

Lat: 39.57°NLon: 76.2°WElev: 412ft.

Fog/Mist

69°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 30.02 in
Dewpoint 69°F (21°C)
Visibility 6.00 mi
Last update 10 Aug 4:15 am EDT
Extended Forecast for

Charlestown MD

  • Today

    Today: A slight chance of showers before 2pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 91. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 30%.

    High: 91 °F

    Sunny then
    Chance
    T-storms

  • Tonight

    Tonight: A chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 72. Light southwest wind. Chance of precipitation is 40%.

    Low: 72 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Northwest wind 3 to 7 mph. Chance of precipitation is 30%.

    High: 88 °F

    Partly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 50%.

    Low: 68 °F

    Chance
    T-storms then
    Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers after 2pm. Mostly sunny, with a high near 86. Light west wind. Chance of precipitation is 20%.

    High: 86 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.

    Low: 71 °F

    Chance
    Showers

  • Thursday

    Thursday: A slight chance of showers after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 20%.

    High: 88 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Today
A slight chance of showers before 2pm, then a chance of showers and thunderstorms after 3pm. Mostly sunny, with a high near 91. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 30%.
Tonight
A chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 72. Light southwest wind. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 88. Northwest wind 3 to 7 mph. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 50%.
Wednesday
A slight chance of showers after 2pm. Mostly sunny, with a high near 86. Light west wind. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 30%.
Thursday
A slight chance of showers after 2pm. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
Thursday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 85.
Friday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 64. Chance of precipitation is 20%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Saturday Night
A slight chance of showers. Partly cloudy, with a low around 65. Chance of precipitation is 20%.
Sunday
A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Charlestown MD
 39.58°N 75.98°W (Elev. 26 ft)
Last Update:
2:22 am EDT Aug 10, 2026
Forecast Valid:
4am EDT Aug 10, 2026-6pm EDT Aug 16, 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