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

Watching Hurricane Erin; Heavy Rainfall Threat for Upper Midwest; Heatrisk for Mississippi Valley

Hurricane Erin continues to track westward with its outer bands bringing heavy rainfall and gusty winds for Puerto Rico and US Virgin Islands. Life-threatening surf and rip currents are occurring and will spread across the Atlantic coasts this week. Meanwhile, heavy rainfall and possible flooding are in the forecast for upper Midwest through Monday. Heatrisk continues for the Mississippi Valley. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Overcast

75°F

24°C

Humidity 84%
Wind Speed N 13 G 22 mph
Barometer 29.94 in (1013.6 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 18 Aug 3:52 am EDT
Extended Forecast for

4 Miles NNW Haymarket VA

  • Today

    Today: Mostly cloudy, with a high near 76. Northeast wind 9 to 11 mph, with gusts as high as 21 mph.

    High: 76 °F

    Mostly Cloudy

  • Tonight

    Tonight: Patchy fog after 3am. Otherwise, cloudy, with a low around 66. Northeast wind 5 to 7 mph.

    Low: 66 °F

    Cloudy then
    Patchy Fog

  • Tuesday

    Tuesday: A slight chance of showers before 7am, then a slight chance of showers after 8am. Patchy fog between 9am and 10am. Otherwise, mostly cloudy, with a high near 73. Northeast wind around 6 mph. Chance of precipitation is 20%.

    High: 73 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Tuesday Night

    Tuesday Night: A slight chance of showers before 2am. Mostly cloudy, with a low around 66. Southeast wind 3 to 6 mph. Chance of precipitation is 20%.

    Low: 66 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers after 2pm. Partly sunny, with a high near 81. East wind 3 to 5 mph. Chance of precipitation is 20%.

    High: 81 °F

    Partly Sunny
    then Slight
    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 20%.

    Low: 67 °F

    Slight Chance
    Showers

  • Thursday

    Thursday: Mostly sunny, with a high near 82.

    High: 82 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 65.

    Low: 65 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 76. Northeast wind 9 to 11 mph, with gusts as high as 21 mph.
Tonight
Patchy fog after 3am. Otherwise, cloudy, with a low around 66. Northeast wind 5 to 7 mph.
Tuesday
A slight chance of showers before 7am, then a slight chance of showers after 8am. Patchy fog between 9am and 10am. Otherwise, mostly cloudy, with a high near 73. Northeast wind around 6 mph. Chance of precipitation is 20%.
Tuesday Night
A slight chance of showers before 2am. Mostly cloudy, with a low around 66. Southeast wind 3 to 6 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of showers after 2pm. Partly sunny, with a high near 81. East wind 3 to 5 mph. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 67. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 82.
Thursday Night
Partly cloudy, with a low around 65.
Friday
Mostly sunny, with a high near 84.
Friday Night
Partly cloudy, with a low around 66.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Partly cloudy, with a low around 67.
Sunday
A chance of showers. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NNW Haymarket VA
 38.86°N 77.66°W (Elev. 469 ft)
Last Update:
4:29 am EDT Aug 18, 2025
Forecast Valid:
4am EDT Aug 18, 2025-6pm EDT Aug 24, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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