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

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

74°F

23°C

Humidity 97%
Wind Speed S 7 mph
Barometer 29.88 in (1011.5 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Last update 17 Aug 12:52 am EDT
Extended Forecast for

Fairfax VA

  • Overnight

    Overnight: Showers likely and possibly a thunderstorm before 1am, then scattered showers and thunderstorms between 1am and 2am, then isolated showers after 2am. Mostly cloudy, with a low around 71. Southwest wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Showers
    Likely

  • Monday

    Monday: Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Northwest wind 6 to 9 mph. Chance of precipitation is 30%.

    High: 88 °F

    Mostly Sunny
    then
    Scattered
    T-storms

  • Monday Night

    Monday Night: Scattered showers and thunderstorms before 10pm, then isolated showers between 10pm and midnight. Partly cloudy, with a low around 70. Northwest wind 3 to 5 mph. Chance of precipitation is 30%.

    Low: 70 °F

    Scattered
    T-storms then
    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 85. Northwest wind around 8 mph.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 67. Light northwest wind.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 70.

    Low: 70 °F

    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 50%.

    High: 85 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.

    Low: 66 °F

    Chance
    T-storms then
    Chance
    Showers

Detailed Forecast

Overnight
Showers likely and possibly a thunderstorm before 1am, then scattered showers and thunderstorms between 1am and 2am, then isolated showers after 2am. Mostly cloudy, with a low around 71. Southwest wind around 6 mph. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday
Scattered showers and thunderstorms after 2pm. Mostly sunny, with a high near 88. Northwest wind 6 to 9 mph. Chance of precipitation is 30%.
Monday Night
Scattered showers and thunderstorms before 10pm, then isolated showers between 10pm and midnight. Partly cloudy, with a low around 70. Northwest wind 3 to 5 mph. Chance of precipitation is 30%.
Tuesday
Sunny, with a high near 85. Northwest wind around 8 mph.
Tuesday Night
Mostly clear, with a low around 67. Light northwest wind.
Wednesday
Sunny, with a high near 88.
Wednesday Night
Partly cloudy, with a low around 70.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 79. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Sunday
A slight chance of showers and thunderstorms. Partly sunny, with a high near 82. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Fairfax VA
 38.85°N 77.32°W (Elev. 413 ft)
Last Update:
12:08 am EDT Aug 17, 2026
Forecast Valid:
12am EDT Aug 17, 2026-6pm EDT Aug 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation