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

Dangerous Heat and Heavy Rainfall into the Weekend

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley into this weekend. Heat Advisories remain in effect. Heavy to excessive rainfall occurring at times through the weekend could bring areas of flooding to parts of the northern Rockies, upper Midwest, central Great Lakes, and southern New England. Read More >

Current conditions at

Washington Manassas Airport (KHEF)

Lat: 38.72°NLon: 77.52°WElev: 194ft.

A Few Clouds

78°F

26°C

Humidity 62%
Wind Speed Calm
Barometer 30.11 in (1020.1 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index80°F (27°C)
Last update 19 Sep 1:56 pm EDT
Extended Forecast for

The Plains VA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 78. Southeast wind around 7 mph.

    High: 78 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 65. Southeast wind 6 to 8 mph.

    Low: 65 °F

    Mostly Cloudy

  • Sunday

    Sunday: Isolated showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Southwest wind 8 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 84 °F

    Isolated
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm before 8pm, then scattered showers. Mostly cloudy, with a low around 61. South wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 61 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 71. North wind around 9 mph. Chance of precipitation is 40%.

    High: 71 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Cloudy, with a low around 58. Chance of precipitation is 50%.

    Low: 58 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 2pm. Cloudy, with a high near 65. Chance of precipitation is 70%.

    High: 65 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.

    Low: 53 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 59. Chance of precipitation is 50%.

    High: 59 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Partly sunny, with a high near 78. Southeast wind around 7 mph.
Tonight
Mostly cloudy, with a low around 65. Southeast wind 6 to 8 mph.
Sunday
Isolated showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 84. Southwest wind 8 to 13 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely and possibly a thunderstorm before 8pm, then scattered showers. Mostly cloudy, with a low around 61. South wind around 5 mph becoming calm. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Monday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 71. North wind around 9 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers. Cloudy, with a low around 58. Chance of precipitation is 50%.
Tuesday
Showers likely, with thunderstorms also possible after 2pm. Cloudy, with a high near 65. Chance of precipitation is 70%.
Tuesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 59. Chance of precipitation is 50%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.
Thursday
A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 30%.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.
Friday
A chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
The Plains VA
 38.85°N 77.78°W (Elev. 600 ft)
Last Update:
2:23 pm EDT Sep 19, 2026
Forecast Valid:
2pm EDT Sep 19, 2026-6pm EDT Sep 25, 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