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.

Mostly Cloudy

58°F

14°C

Humidity 29%
Wind Speed S 12 G 18 mph
Barometer 30.18 in (1022.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Last update 25 Mar 4:52 pm EDT
Extended Forecast for

Catharpin VA

  • Tonight

    Tonight: Mostly cloudy, with a low around 48. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 48 °F

    Mostly Cloudy

  • Thursday

    Thursday: A slight chance of rain before 4pm, then a slight chance of rain after 5pm. Mostly sunny, with a high near 74. Southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Rain

  • Thursday Night

    Thursday Night: A slight chance of rain before 7pm, then a chance of rain after 2am. Increasing clouds, with a low around 56. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.

    Low: 56 °F

    Partly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain, mainly after 8am. High near 64. West wind around 11 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 64 °F

    Rain

  • Friday Night

    Friday Night: Rain, mainly before 8pm. Low around 33. North wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.

    Low: 33 °F

    Rain then
    Chance Rain

  • Saturday

    Saturday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 29.

    Low: 29 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 41.

    Low: 41 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 48. South wind around 10 mph, with gusts as high as 20 mph.
Thursday
A slight chance of rain before 4pm, then a slight chance of rain after 5pm. Mostly sunny, with a high near 74. Southwest wind 10 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Thursday Night
A slight chance of rain before 7pm, then a chance of rain after 2am. Increasing clouds, with a low around 56. Southwest wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 50%.
Friday
Rain, mainly after 8am. High near 64. West wind around 11 mph becoming north in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Rain, mainly before 8pm. Low around 33. North wind 7 to 11 mph, with gusts as high as 20 mph. Chance of precipitation is 80%.
Saturday
Sunny, with a high near 49.
Saturday Night
Mostly clear, with a low around 29.
Sunday
Sunny, with a high near 56.
Sunday Night
Partly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 64.
Monday Night
Mostly cloudy, with a low around 48.
Tuesday
A chance of rain. Partly sunny, with a high near 69. Chance of precipitation is 30%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 53. Chance of precipitation is 30%.
Wednesday
A chance of rain. Partly sunny, with a high near 77. Chance of precipitation is 30%.
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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:
4:54 pm EDT Mar 25, 2026
Forecast Valid:
5pm EDT Mar 25, 2026-6pm EDT Apr 1, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation