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

Dangerous Heat and Possible Flooding

Dangerous heat will persist across the Southwest U.S. through Saturday with daytime highs of 110-115°F. Extreme Heat Warnings remain in effect. Dangerous heat will build across the southern Plains again beginning this weekend. Heavy to excessive rain over the Carolinas Friday may lead to isolated areas of flash flooding. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

81°F

27°C

Humidity 62%
Wind Speed NE 9 mph
Barometer 30.03 in (1016.7 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 28 Aug 6:52 pm EDT
Extended Forecast for

Fairfax VA

  • Tonight

    Tonight: Mostly clear, with a low around 64. North wind 5 to 7 mph becoming calm.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 85. Northeast wind 3 to 6 mph.

    High: 85 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 67. Southeast wind 3 to 5 mph.

    Low: 67 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 88. South wind 5 to 8 mph.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 72. South wind around 5 mph.

    Low: 72 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 91.

    High: 91 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 74.

    Low: 74 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 93.

    High: 93 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 64. North wind 5 to 7 mph becoming calm.
Saturday
Sunny, with a high near 85. Northeast wind 3 to 6 mph.
Saturday Night
Partly cloudy, with a low around 67. Southeast wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 88. South wind 5 to 8 mph.
Sunday Night
Partly cloudy, with a low around 72. South wind around 5 mph.
Monday
Mostly sunny, with a high near 91.
Monday Night
Partly cloudy, with a low around 74.
Tuesday
Mostly sunny, with a high near 93.
Tuesday Night
Partly cloudy, with a low around 75.
Wednesday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 94. Chance of precipitation is 20%.
Wednesday Night
A slight chance of showers and thunderstorms. Partly cloudy, with a low around 75. Chance of precipitation is 20%.
Thursday
A chance of showers and thunderstorms. Mostly sunny, with a high near 91. Chance of precipitation is 30%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Friday
A slight chance of showers. Mostly sunny, with a high near 88. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Fairfax VA
 38.85°N 77.32°W (Elev. 413 ft)
Last Update:
4:53 pm EDT Aug 28, 2026
Forecast Valid:
7pm EDT Aug 28, 2026-6pm EDT Sep 4, 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