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

Heavy to Excessive Rainfall This Week from the Southwest into Central U.S.

Pacific tropical moisture wrapping into a storm over the southwest U.S. will continue a multi-day heavy rainfall event this week that will extend into the Midwest and southern Plains. Considerable flash flooding is possible across portions of New Mexico and west Texas today through Wednesday. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

62°F

17°C

Humidity 86%
Wind Speed Calm
Barometer 30.03 in (1016.8 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 29 Sep 6:52 am EDT
Extended Forecast for

Vienna VASimilar City Names

  • Today

    Today: Mostly cloudy, with a high near 73. Calm wind becoming northwest around 5 mph in the morning.

    High: 73 °F

    Mostly Cloudy

  • Tonight

    Tonight: Patchy fog after 5am. Otherwise, partly cloudy, with a low around 58. Calm wind.

    Low: 58 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 9am. Otherwise, mostly sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 61. South wind around 5 mph.

    Low: 61 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 85. Southwest wind 3 to 5 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 62. Chance of precipitation is 20%.

    Low: 62 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Saturday

    Saturday: A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.

    High: 73 °F

    Slight Chance
    Showers then
    Chance
    Showers

Detailed Forecast

Today
Mostly cloudy, with a high near 73. Calm wind becoming northwest around 5 mph in the morning.
Tonight
Patchy fog after 5am. Otherwise, partly cloudy, with a low around 58. Calm wind.
Wednesday
Patchy fog before 9am. Otherwise, mostly sunny, with a high near 81. Calm wind becoming southwest around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 61. South wind around 5 mph.
Thursday
Sunny, with a high near 85. Southwest wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 63.
Friday
Mostly sunny, with a high near 86.
Friday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 62. Chance of precipitation is 20%.
Saturday
A chance of showers, mainly after 2pm. Mostly cloudy, with a high near 73. Chance of precipitation is 50%.
Saturday Night
Showers likely, mainly after 8pm. Mostly cloudy, with a low around 59. Chance of precipitation is 60%.
Sunday
Showers likely. Mostly cloudy, with a high near 68. Chance of precipitation is 70%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 54. Chance of precipitation is 40%.
Monday
A slight chance of showers. Partly sunny, with a high near 66. Chance of precipitation is 20%.
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ABOUT THIS FORECAST

 
Point Forecast:
Vienna VASimilar City Names
 38.89°N 77.25°W (Elev. 348 ft)
Last Update:
7:26 am EDT Sep 29, 2026
Forecast Valid:
7am EDT Sep 29, 2026-6pm EDT Oct 5, 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