National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

A Few Clouds

42°F

6°C

Humidity 49%
Wind Speed SE 6 mph
Barometer 30.55 in (1034.8 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill38°F (3°C)
Last update 8 Apr 10:52 pm EDT
Extended Forecast for

Great Falls VA

Frost Advisory April 9, 12:00am until April 9, 09:00am
Click here for hazard details and duration
Frost Advisory

  • Tonight

    Tonight: Areas of frost after 2am. Otherwise, partly cloudy, with a low around 34. Southeast wind 3 to 5 mph.

    Low: 34 °F

    Areas Frost

  • Thursday

    Thursday: Areas of frost before 9am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 62 °F

    Areas Frost
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 42. South wind around 6 mph.

    Low: 42 °F

    Mostly Clear

  • Friday

    Friday: Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 75. South wind 3 to 8 mph.

    High: 75 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 53. South wind around 7 mph becoming west after midnight.

    Low: 53 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 47 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

Detailed Forecast

Tonight
Areas of frost after 2am. Otherwise, partly cloudy, with a low around 34. Southeast wind 3 to 5 mph.
Thursday
Areas of frost before 9am. Otherwise, mostly sunny, with a high near 62. Calm wind becoming south 5 to 7 mph in the afternoon.
Thursday Night
Mostly clear, with a low around 42. South wind around 6 mph.
Friday
Patchy fog between 7am and 8am. Otherwise, sunny, with a high near 75. South wind 3 to 8 mph.
Friday Night
Partly cloudy, with a low around 53. South wind around 7 mph becoming west after midnight.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
Mostly clear, with a low around 47.
Sunday
Mostly sunny, with a high near 72.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Partly sunny, with a high near 85.
Monday Night
Mostly cloudy, with a low around 67.
Tuesday
Partly sunny, with a high near 91.
Tuesday Night
Mostly cloudy, with a low around 69.
Wednesday
A chance of showers. Partly sunny, with a high near 91. Chance of precipitation is 30%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Great Falls VA
 39.01°N 77.29°W (Elev. 348 ft)
Last Update:
10:53 pm EDT Apr 8, 2026
Forecast Valid:
11pm EDT Apr 8, 2026-6pm EDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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