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.

Partly Cloudy

41°F

5°C

Humidity 76%
Wind Speed S 5 mph
Barometer 30.11 in (1019.6 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 20 Mar 7:52 am EDT
Extended Forecast for

Catharpin VA

  • Today

    Today: Increasing clouds, with a high near 70. Light south wind becoming southwest 11 to 16 mph in the morning. Winds could gust as high as 28 mph.

    High: 70 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Showers likely, mainly before 11pm. Cloudy during the early evening, then gradual clearing, with a low around 48. Southwest wind 6 to 10 mph becoming northwest after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 64. North wind 6 to 8 mph.

    High: 64 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 45. Light and variable wind becoming southeast around 5 mph after midnight.

    Low: 45 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 77. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 77 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain, mainly after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.

    Low: 53 °F

    Chance Rain

  • Monday

    Monday: A chance of rain before 2pm. Partly sunny, with a high near 62. Chance of precipitation is 30%.

    High: 62 °F

    Chance Rain

  • Monday Night

    Monday Night: Mostly clear, with a low around 32.

    Low: 32 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 53.

    High: 53 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 70. Light south wind becoming southwest 11 to 16 mph in the morning. Winds could gust as high as 28 mph.
Tonight
Showers likely, mainly before 11pm. Cloudy during the early evening, then gradual clearing, with a low around 48. Southwest wind 6 to 10 mph becoming northwest after midnight. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 64. North wind 6 to 8 mph.
Saturday Night
Partly cloudy, with a low around 45. Light and variable wind becoming southeast around 5 mph after midnight.
Sunday
Partly sunny, with a high near 77. Southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Sunday Night
A chance of rain, mainly after 2am. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Monday
A chance of rain before 2pm. Partly sunny, with a high near 62. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 32.
Tuesday
Sunny, with a high near 53.
Tuesday Night
Mostly cloudy, with a low around 37.
Wednesday
Mostly cloudy, with a high near 58.
Wednesday Night
Mostly cloudy, with a low around 40.
Thursday
Mostly sunny, with a high near 66.
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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:
7:53 am EDT Mar 20, 2026
Forecast Valid:
8am EDT Mar 20, 2026-6pm EDT Mar 26, 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