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

34°F

1°C

Humidity 54%
Wind Speed NW 13 G 23 mph
Barometer 30.24 in (1024.3 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 11 Jan 11:52 pm EST
Extended Forecast for

Catharpin VA

  • Overnight

    Overnight: Mostly clear, with a low around 29. Northwest wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 29 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 46. West wind around 7 mph becoming southwest in the afternoon.

    High: 46 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 27. Southwest wind around 5 mph becoming calm in the evening.

    Low: 27 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 50. Calm wind becoming south 5 to 9 mph in the afternoon.

    High: 50 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 38. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 38 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of rain. Cloudy, with a high near 52. Chance of precipitation is 20%.

    High: 52 °F

    Slight Chance
    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 50%.

    Low: 34 °F

    Chance Rain

  • Thursday

    Thursday: A chance of rain before 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 50%.

    High: 40 °F

    Chance Rain
    then Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A chance of snow before 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.

    Low: 20 °F

    Chance Snow

Detailed Forecast

Overnight
Mostly clear, with a low around 29. Northwest wind 9 to 11 mph, with gusts as high as 22 mph.
Monday
Mostly sunny, with a high near 46. West wind around 7 mph becoming southwest in the afternoon.
Monday Night
Partly cloudy, with a low around 27. Southwest wind around 5 mph becoming calm in the evening.
Tuesday
Mostly sunny, with a high near 50. Calm wind becoming south 5 to 9 mph in the afternoon.
Tuesday Night
Mostly cloudy, with a low around 38. Southwest wind around 10 mph, with gusts as high as 20 mph.
Wednesday
A slight chance of rain. Cloudy, with a high near 52. Chance of precipitation is 20%.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 34. Chance of precipitation is 50%.
Thursday
A chance of rain before 1pm, then a chance of rain and snow. Mostly cloudy, with a high near 40. Chance of precipitation is 50%.
Thursday Night
A chance of snow before 1am. Mostly cloudy, with a low around 20. Chance of precipitation is 30%.
Friday
Mostly sunny, with a high near 37.
Friday Night
Partly cloudy, with a low around 22.
Saturday
Partly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
A chance of snow. Partly sunny, with a high near 37. 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:
9:53 pm EST Jan 11, 2026
Forecast Valid:
12am EST Jan 12, 2026-6pm EST Jan 18, 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