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

Strong to Severe Thunderstorms Continue Tonight in the East; Early Heat Wave in the West

Scattered strong to severe storms with damaging winds and potentially a tornado or two are expected tonight from the coastal Carolinas into the Mid-Atlantic states. An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Partly Cloudy

37°F

3°C

Humidity 73%
Wind Speed W 16 mph
Barometer 29.59 in (1002.0 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill28°F (-2°C)
Last update 16 Mar 11:52 pm EDT
Extended Forecast for

Herndon VA

  • Overnight

    Overnight: Partly cloudy, with a low around 29. West wind 16 to 18 mph, with gusts as high as 33 mph.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 39. West wind 11 to 14 mph, with gusts as high as 26 mph.

    High: 39 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 24. Northwest wind 5 to 11 mph, with gusts as high as 20 mph.

    Low: 24 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 41. Calm wind becoming south 5 to 7 mph in the afternoon.

    High: 41 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 30. South wind around 6 mph.

    Low: 30 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 52.

    High: 52 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Friday Night

    Friday Night: A chance of rain before 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 30%.

    Low: 43 °F

    Chance Rain

Detailed Forecast

Overnight
Partly cloudy, with a low around 29. West wind 16 to 18 mph, with gusts as high as 33 mph.
Tuesday
Mostly sunny, with a high near 39. West wind 11 to 14 mph, with gusts as high as 26 mph.
Tuesday Night
Mostly clear, with a low around 24. Northwest wind 5 to 11 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 41. Calm wind becoming south 5 to 7 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 30. South wind around 6 mph.
Thursday
Mostly cloudy, with a high near 52.
Thursday Night
Mostly cloudy, with a low around 37.
Friday
Partly sunny, with a high near 60.
Friday Night
A chance of rain before 2am. Mostly cloudy, with a low around 43. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 60.
Saturday Night
Mostly cloudy, with a low around 42.
Sunday
Mostly sunny, with a high near 64.
Sunday Night
Mostly cloudy, with a low around 37.
Monday
Mostly sunny, with a high near 54.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.99°N 77.38°W (Elev. 318 ft)
Last Update:
10:54 pm EDT Mar 16, 2026
Forecast Valid:
12am EDT Mar 17, 2026-6pm EDT Mar 23, 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