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

Washington/Reagan National Airport, DC (KDCA)

Lat: 38.85°NLon: 77.03°WElev: 13ft.

Partly Cloudy

68°F

20°C

Humidity 78%
Wind Speed N 6 mph
Barometer 30.10 in (1019.3 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Last update 21 Aug 7:52 am EDT
Extended Forecast for

Cabin John MD

  • Today

    Today: Mostly sunny, with a high near 84. North wind 3 to 5 mph.

    High: 84 °F

    Mostly Sunny

  • Tonight

    Tonight: A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 40%.

    Low: 68 °F

    Mostly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: Showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 5pm, then a chance of showers and thunderstorms after 5pm. Patchy fog before 7am. High near 80. East wind 3 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.

    High: 80 °F

    Showers and
    Patchy Fog

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms, mainly between 1am and 2am. Mostly cloudy, with a low around 67. Light north wind. Chance of precipitation is 40%.

    Low: 67 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Calm wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 20%.

    High: 85 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 84. North wind 3 to 5 mph.
Tonight
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 68. Calm wind. Chance of precipitation is 40%.
Saturday
Showers and thunderstorms before noon, then showers likely and possibly a thunderstorm between noon and 5pm, then a chance of showers and thunderstorms after 5pm. Patchy fog before 7am. High near 80. East wind 3 to 6 mph. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Saturday Night
A chance of showers and thunderstorms, mainly between 1am and 2am. Mostly cloudy, with a low around 67. Light north wind. Chance of precipitation is 40%.
Sunday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Calm wind becoming west 5 to 8 mph in the morning. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 65.
Monday
Sunny, with a high near 84.
Monday Night
Mostly clear, with a low around 63.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Partly cloudy, with a low around 67.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 70. Chance of precipitation is 50%.
Thursday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Cabin John MD
 38.97°N 77.15°W (Elev. 56 ft)
Last Update:
7:52 am EDT Aug 21, 2026
Forecast Valid:
8am EDT Aug 21, 2026-6pm EDT Aug 27, 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