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

34°F

1°C

Humidity 54%
Wind Speed S 6 mph
Barometer 30.15 in (1021.1 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill29°F (-2°C)
Last update 12 Jan 8:52 pm EST
Extended Forecast for

3 Miles WNW Catharpin VA

  • Tonight

    Tonight: Mostly clear, with a low around 29. Light west wind.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50. Light southwest wind becoming south 5 to 10 mph in the morning.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A chance of rain, mainly after 1pm. Cloudy, with a high near 51. Southwest wind around 6 mph. Chance of precipitation is 30%.

    High: 51 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: Rain likely. Mostly cloudy, with a low around 27. Light and variable wind becoming northwest 6 to 11 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 60%.

    Low: 27 °F

    Rain Likely

  • Thursday

    Thursday: A slight chance of snow before 1pm. Mostly sunny, with a high near 34. Chance of precipitation is 20%.

    High: 34 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 35.

    High: 35 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 24.

    Low: 24 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 29. Light west wind.
Tuesday
Mostly sunny, with a high near 50. Light southwest wind becoming south 5 to 10 mph in the morning.
Tuesday Night
Mostly cloudy, with a low around 39. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.
Wednesday
A chance of rain, mainly after 1pm. Cloudy, with a high near 51. Southwest wind around 6 mph. Chance of precipitation is 30%.
Wednesday Night
Rain likely. Mostly cloudy, with a low around 27. Light and variable wind becoming northwest 6 to 11 mph in the evening. Winds could gust as high as 20 mph. Chance of precipitation is 60%.
Thursday
A slight chance of snow before 1pm. Mostly sunny, with a high near 34. Chance of precipitation is 20%.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 35.
Friday Night
Partly cloudy, with a low around 24.
Saturday
Mostly sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Partly sunny, with a high near 34.
Sunday Night
Partly cloudy, with a low around 15.
M.L.King Day
Mostly sunny, with a high near 31.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WNW Catharpin VA
 38.86°N 77.63°W (Elev. 400 ft)
Last Update:
9:31 pm EST Jan 12, 2026
Forecast Valid:
9pm EST Jan 12, 2026-6pm EST Jan 19, 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