Dangerous Heat in the Southwest; Severe Thunderstorms and Heavy Rain in the Northeast and Mid-Atlantic

Dangerous heat will persist across the Southwest U.S. through Friday with daytime highs of 110-115°F. Heat across the southern Plains will briefly ease to near-normal by late week. Strong to severe thunderstorms may produce damaging wind, hail, a tornado or two, heavy rain and flash flooding across parts of the Mid-Atlantic and Northeast. Heavy rainfall threat continues across the Gulf Coast. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

83°F

28°C

Humidity 67%
Wind Speed S 13 G 18 mph
Barometer 29.97 in (1014.7 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 27 Aug 12:52 pm EDT
Extended Forecast for

3 Miles NNW Chantilly VA

  • This Afternoon

    This Afternoon: A chance of showers and thunderstorms after 2pm. Some of the storms could be severe.  Partly sunny, with a high near 88. South wind around 9 mph.  Chance of precipitation is 40%.

    High: 88 °F

    Severe
    Thunderstorms

  • Tonight

    Tonight: A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Some of the storms could be severe.  Patchy fog after 2am.  Otherwise, mostly cloudy, with a low around 68. South wind around 6 mph becoming calm  in the evening.  Chance of precipitation is 40%.

    Low: 68 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Friday

    Friday: A slight chance of showers and thunderstorms after 2pm.  Patchy fog before 8am.  Otherwise, partly sunny, with a high near 86. Calm wind becoming north around 6 mph in the morning.  Chance of precipitation is 20%.

    High: 86 °F

    Patchy Fog
    then Slight
    Chance
    T-storms

  • Friday Night

    Friday Night: Patchy fog between midnight and 1am.  Otherwise, mostly cloudy, with a low around 67. Light north wind.

    Low: 67 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Saturday

    Saturday: Mostly sunny, with a high near 87. North wind 3 to 5 mph.

    High: 87 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog between 4am and 5am.  Otherwise, mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 71.

    Low: 71 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 92.

    High: 92 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Partly sunny, with a high near 88. South wind around 9 mph. Chance of precipitation is 40%.
Tonight
A chance of showers and thunderstorms before midnight, then a slight chance of showers between midnight and 2am. Some of the storms could be severe. Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 68. South wind around 6 mph becoming calm in the evening. Chance of precipitation is 40%.
Friday
A slight chance of showers and thunderstorms after 2pm. Patchy fog before 8am. Otherwise, partly sunny, with a high near 86. Calm wind becoming north around 6 mph in the morning. Chance of precipitation is 20%.
Friday Night
Patchy fog between midnight and 1am. Otherwise, mostly cloudy, with a low around 67. Light north wind.
Saturday
Mostly sunny, with a high near 87. North wind 3 to 5 mph.
Saturday Night
Patchy fog between 4am and 5am. Otherwise, mostly clear, with a low around 68.
Sunday
Sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 71.
Monday
Mostly sunny, with a high near 92.
Monday Night
Partly cloudy, with a low around 72.
Tuesday
Mostly sunny, with a high near 92.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 73. Chance of precipitation is 20%.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles NNW Chantilly VA
 38.91°N 77.42°W (Elev. 348 ft)
10:53 am EDT Aug 27, 2026
1pm EDT Aug 27, 2026-6pm EDT Sep 2, 2026
 
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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