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.

A Few Clouds

41°F

5°C

Humidity 30%
Wind Speed SW 10 mph
Barometer 30.31 in (1026.7 mb)
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 18 Mar 5:52 pm EDT
Extended Forecast for

Catharpin VA

  • Tonight

    Tonight: Increasing clouds, with a low around 28. Southeast wind 3 to 6 mph.

    Low: 28 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Partly sunny, with a high near 55. South wind 5 to 7 mph.

    High: 55 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of showers after 2pm. Partly sunny, with a high near 64. Calm wind becoming south 5 to 9 mph in the afternoon. Chance of precipitation is 20%.

    High: 64 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 49. South wind around 8 mph. Chance of precipitation is 60%.

    Low: 49 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers before 8am. Partly sunny, with a high near 69. Chance of precipitation is 30%.

    High: 69 °F

    Chance
    Showers then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain after 8pm. Mostly cloudy, with a low around 44. Chance of precipitation is 40%.

    Low: 44 °F

    Chance Rain

Detailed Forecast

Tonight
Increasing clouds, with a low around 28. Southeast wind 3 to 6 mph.
Thursday
Partly sunny, with a high near 55. South wind 5 to 7 mph.
Thursday Night
Partly cloudy, with a low around 37. Calm wind.
Friday
A slight chance of showers after 2pm. Partly sunny, with a high near 64. Calm wind becoming south 5 to 9 mph in the afternoon. Chance of precipitation is 20%.
Friday Night
Showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 49. South wind around 8 mph. Chance of precipitation is 60%.
Saturday
A chance of showers before 8am. Partly sunny, with a high near 69. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 47.
Sunday
Partly sunny, with a high near 73.
Sunday Night
A chance of rain after 8pm. Mostly cloudy, with a low around 44. Chance of precipitation is 40%.
Monday
Partly sunny, with a high near 56.
Monday Night
Mostly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 50.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Partly sunny, with a high near 59.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Catharpin VA
 38.86°N 77.58°W (Elev. 295 ft)
Last Update:
4:53 pm EDT Mar 18, 2026
Forecast Valid:
6pm EDT Mar 18, 2026-6pm EDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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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