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

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Light Rain

59°F

15°C

Humidity 72%
Wind Speed N 12 mph
Barometer 30.24 in (1023.8 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 3 Oct 8:52 am EDT
Extended Forecast for

Chantilly VA

  • Today

    Today: Showers, mainly before 1pm. High near 66. North wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Showers then
    Chance
    Showers

  • Tonight

    Tonight: A chance of showers before 10pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 58. Light east wind. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    Showers

  • Sunday

    Sunday: Showers before 3pm, then a chance of showers after 4pm. High near 66. Northeast wind 3 to 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 66 °F

    Showers

  • Sunday Night

    Sunday Night: Cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 70. Northwest wind 6 to 11 mph, with gusts as high as 22 mph.

    High: 70 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

Detailed Forecast

Today
Showers, mainly before 1pm. High near 66. North wind around 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A chance of showers before 10pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 58. Light east wind. Chance of precipitation is 30%.
Sunday
Showers before 3pm, then a chance of showers after 4pm. High near 66. Northeast wind 3 to 5 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Cloudy, with a low around 58. Calm wind.
Monday
Mostly sunny, with a high near 70. Northwest wind 6 to 11 mph, with gusts as high as 22 mph.
Monday Night
Clear, with a low around 46.
Tuesday
Sunny, with a high near 63.
Tuesday Night
Mostly clear, with a low around 44.
Wednesday
Sunny, with a high near 67.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 72.
Thursday Night
Mostly clear, with a low around 52.
Friday
Sunny, with a high near 72.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Chantilly VA
 38.88°N 77.4°W (Elev. 358 ft)
Last Update:
10:03 am EDT Oct 3, 2026
Forecast Valid:
10am EDT Oct 3, 2026-6pm EDT Oct 9, 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