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National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
7-Day Forecast 39.02°N 77.2°W (Text-Only)
NWS Forecast for: Potomac MD
Issued by: National Weather Service Baltimore, MD/Washington, D.C.
Last Update: 2:22 am EDT Jun 30, 2026		Print

  • Overnight

    Overnight: Mostly clear, with a low around 68. Light southeast wind.

    Low: 68 °F

    Mostly Clear



  • Tuesday

    Tuesday: Sunny, with a high near 90. Calm wind becoming south 5 to 9 mph in the morning.

    High: 90 °F

    Sunny



  • Tuesday
    Night

    Tuesday Night: Mostly clear, with a low around 71. South wind 3 to 7 mph.

    Low: 71 °F

    Mostly Clear



  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 105. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.

    High: 97 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Wednesday
    Night

    Wednesday Night: Mostly clear, with a low around 76. South wind 3 to 5 mph.

    Low: 76 °F

    Mostly Clear



  • Thursday

    Thursday: Sunny and hot, with a high near 101.

    High: 101 °F

    Hot



  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 79.

    Low: 79 °F

    Mostly Clear



  • Friday

    Friday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 102. Chance of precipitation is 20%.

    High: 102 °F

    Sunny then
    Slight Chance
    T-storms

  • Friday
    Night

    Friday Night: A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 77. Chance of precipitation is 20%.

    Low: 77 °F

    Slight Chance
    T-storms


    • Overnight: Mostly clear, with a low around 68. Light southeast wind.

    Tuesday: Sunny, with a high near 90. Calm wind becoming south 5 to 9 mph in the morning.

    Tuesday Night: Mostly clear, with a low around 71. South wind 3 to 7 mph.

    Wednesday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. Heat index values as high as 105. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.

    Wednesday Night: Mostly clear, with a low around 76. South wind 3 to 5 mph.

    Thursday: Sunny and hot, with a high near 101.

    Thursday Night: Mostly clear, with a low around 79.

    Friday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 102. Chance of precipitation is 20%.

    Friday Night: A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 77. Chance of precipitation is 20%.

    Independence Day: A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 100. Chance of precipitation is 30%.

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 74. Chance of precipitation is 40%.

    Sunday: A chance of showers and thunderstorms. Partly sunny, with a high near 94. Chance of precipitation is 50%.

    Sunday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 73. Chance of precipitation is 40%.

    Monday: A chance of showers and thunderstorms. Partly sunny, with a high near 91. Chance of precipitation is 50%.


    Potomac MD
     39.02°N 77.2°W (Elev. 381 ft)

    Visit your local NWS office at: https://www.weather.gov/lwx