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/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

77°F

25°C

Humidity 60%
Wind Speed S 6 mph
Barometer 30.11 in (1019.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 19 Sep 1:52 pm EDT
Extended Forecast for

Washington-Dulles International Airport VA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 79. East wind around 7 mph.

    High: 79 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 66. South wind around 8 mph.

    Low: 66 °F

    Mostly Cloudy

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 85. Southwest wind 9 to 13 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Mostly Cloudy
    then Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Light and variable wind becoming north around 6 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 62 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 73. North wind around 10 mph. Chance of precipitation is 40%.

    High: 73 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers. Cloudy, with a low around 60. Chance of precipitation is 50%.

    Low: 60 °F

    Chance
    Showers

  • Tuesday

    Tuesday: Showers likely, with thunderstorms also possible after 2pm. Cloudy, with a high near 67. Chance of precipitation is 60%.

    High: 67 °F

    Showers
    Likely

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 50%.

    Low: 55 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 63. Chance of precipitation is 40%.

    High: 63 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 79. East wind around 7 mph.
Tonight
Mostly cloudy, with a low around 66. South wind around 8 mph.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 85. Southwest wind 9 to 13 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 62. Light and variable wind becoming north around 6 mph after midnight. 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 73. North wind around 10 mph. Chance of precipitation is 40%.
Monday Night
A chance of showers. Cloudy, with a low around 60. Chance of precipitation is 50%.
Tuesday
Showers likely, with thunderstorms also possible after 2pm. Cloudy, with a high near 67. Chance of precipitation is 60%.
Tuesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 55. Chance of precipitation is 50%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 63. Chance of precipitation is 40%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.
Thursday
A chance of showers. Mostly cloudy, with a high near 64. Chance of precipitation is 30%.
Thursday Night
A slight chance of showers. Mostly cloudy, with a low around 52. Chance of precipitation is 20%.
Friday
A slight chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Washington-Dulles International Airport VA
 38.95°N 77.44°W (Elev. 285 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