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.

Overcast

76°F

24°C

Humidity 72%
Wind Speed E 7 mph
Barometer 30.06 in (1018.2 mb)
Dewpoint 66°F (19°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Sep 6:56 pm EDT
Extended Forecast for

The Plains VA

  • Tonight

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

    Low: 65 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 84. Southwest wind 8 to 11 mph. Chance of precipitation is 40%.

    High: 84 °F

    Chance
    Showers then
    Chance
    T-storms

  • Sunday Night

    Sunday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 61. South wind around 5 mph becoming calm. Chance of precipitation is 40%.

    Low: 61 °F

    Chance
    T-storms then
    Chance
    Showers

  • Monday

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

    High: 71 °F

    Mostly Cloudy
    then Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Cloudy, with a low around 58. Northeast wind around 7 mph. 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

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.

    Low: 53 °F

    Chance
    Showers

Detailed Forecast

Tonight
Mostly cloudy, with a low around 65. Southeast wind 6 to 8 mph.
Sunday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 84. Southwest wind 8 to 11 mph. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 61. South wind around 5 mph becoming calm. Chance of precipitation is 40%.
Monday
A chance of showers 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. Northeast wind around 7 mph. 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%.
Friday Night
A chance of showers. Partly cloudy, with a low around 51. Chance of precipitation is 30%.
Saturday
A slight chance of showers. Mostly sunny, with a high near 69. Chance of precipitation is 20%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
The Plains VA
 38.85°N 77.78°W (Elev. 600 ft)
Last Update:
4:53 pm EDT Sep 19, 2026
Forecast Valid:
7pm EDT Sep 19, 2026-6pm EDT Sep 26, 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