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

Washington Manassas Airport (KHEF)

Lat: 38.72°NLon: 77.52°WElev: 194ft.

Fair

70°F

21°C

Humidity 100%
Wind Speed Calm
Barometer 29.87 in (1011.9 mb)
Dewpoint 70°F (21°C)
Visibility 10.00 mi
Last update 18 Aug 5:56 am EDT
Extended Forecast for

Haymarket VA

  • Today

    Today: Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 86. North wind 3 to 6 mph.

    High: 86 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 67. Light north wind.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88. Light and variable wind.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 69. Calm wind.

    Low: 69 °F

    Partly Cloudy

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Light and variable wind. Chance of precipitation is 70%.

    High: 85 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.

    High: 82 °F

    Partly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.

    Low: 66 °F

    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

Detailed Forecast

Today
Patchy fog between 7am and 8am. Otherwise, mostly sunny, with a high near 86. North wind 3 to 6 mph.
Tonight
Mostly clear, with a low around 67. Light north wind.
Wednesday
Sunny, with a high near 88. Light and variable wind.
Wednesday Night
Partly cloudy, with a low around 69. Calm wind.
Thursday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Light and variable wind. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 50%.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 63. Chance of precipitation is 30%.
Monday
Sunny, with a high near 83.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Haymarket VA
 38.82°N 77.64°W (Elev. 348 ft)
Last Update:
5:25 am EDT Aug 18, 2026
Forecast Valid:
6am EDT Aug 18, 2026-6pm EDT Aug 24, 2026
 
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