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.

Partly Cloudy

24°C

75°F

Humidity 94%
Wind Speed S 7 km/h
Barometer 1017.0 mb (30.04 in)
Dewpoint 23°C (73°F)
Visibility 16 km
Last update 13 Jul 12:52 am EDT
Extended Forecast for

Chantilly VA

  • Overnight

    Overnight: Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °C

    Mostly Cloudy

  • Sunday

    Sunday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 32. Southeast wind 5 to 10 km/h. Chance of precipitation is 80%. New rainfall amounts between 5 and 7.5 mm possible.

    High: 32 °C

    Chance
    Showers then
    T-storms

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 22. South wind 5 to 10 km/h becoming calm after midnight. Chance of precipitation is 80%. New rainfall amounts between 7.5 mm and 1 cm possible.

    Low: 22 °C

    T-storms then
    Showers
    Likely

  • Monday

    Monday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 32. Calm wind becoming northwest 5 to 8 km/h in the morning. Chance of precipitation is 70%. New rainfall amounts between 2.5 and 5 mm possible.

    High: 32 °C

    Chance
    T-storms then
    Showers
    Likely

  • Monday Night

    Monday Night: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 60%.

    Low: 22 °C

    Showers
    Likely then
    Slight Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 33. Chance of precipitation is 30%.

    High: 33 °C

    Mostly Sunny
    then Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 22. Chance of precipitation is 30%.

    Low: 22 °C

    Chance
    T-storms then
    Partly Cloudy

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 33. Chance of precipitation is 40%.

    High: 33 °C

    Partly Sunny
    then Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.

    Low: 23 °C

    Chance
    T-storms then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 22. Calm wind.
Sunday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 32. Southeast wind 5 to 10 km/h. Chance of precipitation is 80%. New rainfall amounts between 5 and 7.5 mm possible.
Sunday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 22. South wind 5 to 10 km/h becoming calm after midnight. Chance of precipitation is 80%. New rainfall amounts between 7.5 mm and 1 cm possible.
Monday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 32. Calm wind becoming northwest 5 to 8 km/h in the morning. Chance of precipitation is 70%. New rainfall amounts between 2.5 and 5 mm possible.
Monday Night
Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 22. Calm wind. Chance of precipitation is 60%.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 33. Chance of precipitation is 30%.
Tuesday Night
A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 22. Chance of precipitation is 30%.
Wednesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 33. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Thursday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 33. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Friday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 34. Chance of precipitation is 60%.
Friday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 22. Chance of precipitation is 60%.
Saturday
A chance of showers and thunderstorms. Mostly sunny, with a high near 31. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Chantilly VA
 38.88°N 77.4°W (Elev. 358 m)
Last Update:
10:30 am EDT Jul 12, 2025
Forecast Valid:
1am EDT Jul 13, 2025-6pm EDT Jul 19, 2025
 
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