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

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Fair

56°F

13°C

Humidity 57%
Wind Speed S 5 mph
Barometer 30.00 in (1015.8 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 9 Mar 10:52 pm EDT
Extended Forecast for

Catharpin VA

  • Tonight

    Tonight: Clear, with a low around 48. Light southwest wind.

    Low: 48 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 78. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 78 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. South wind around 5 mph.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 78. South wind 5 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    High: 78 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 44. South wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.

    Low: 44 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday

    Thursday: Showers likely, mainly before 2pm. Mostly cloudy, with a high near 54. Breezy. Chance of precipitation is 60%.

    High: 54 °F

    Showers
    Likely and
    Breezy

  • Thursday Night

    Thursday Night: A chance of showers before 8pm. Partly cloudy, with a low around 30. Chance of precipitation is 30%.

    Low: 30 °F

    Chance
    Showers then
    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 55. Breezy.

    High: 55 °F

    Mostly Sunny
    then Mostly
    Cloudy and
    Breezy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Clear, with a low around 48. Light southwest wind.
Tuesday
Sunny, with a high near 78. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 59. South wind around 5 mph.
Wednesday
A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 78. South wind 5 to 14 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Wednesday Night
A chance of showers and thunderstorms, then showers likely after 8pm. Mostly cloudy, with a low around 44. South wind 11 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 70%.
Thursday
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 54. Breezy. Chance of precipitation is 60%.
Thursday Night
A chance of showers before 8pm. Partly cloudy, with a low around 30. Chance of precipitation is 30%.
Friday
Partly sunny, with a high near 55. Breezy.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 59.
Saturday Night
Mostly cloudy, with a low around 41.
Sunday
Partly sunny, with a high near 68.
Sunday Night
Showers likely. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Monday
Showers likely. Mostly cloudy, with a high near 54. Chance of precipitation is 60%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Catharpin VA
 38.86°N 77.58°W (Elev. 295 ft)
Last Update:
10:53 pm EDT Mar 9, 2026
Forecast Valid:
11pm EDT Mar 9, 2026-6pm EDT Mar 16, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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