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

Hot Temperatures in the West; Heavy Rainfall and Flooding Potential in the Southwest

Hot to extremely hot temperatures are in place across coastal southern California again today and the interior Northwest U.S into Thursday, with the Pacific Northwest carrying the potential for record-breaking high temperatures. A combination of monsoonal moisture and tropical moisture ahead of tropical cyclone Lorena will bring heavy rainfall and the potential for flooding through the week. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Partly Cloudy

70°F

21°C

Humidity 61%
Wind Speed S 5 mph
Barometer 29.99 in (1015.4 mb)
Dewpoint 56°F (13°C)
Visibility 9.00 mi
Last update 3 Sep 9:52 am EDT
Extended Forecast for

Sterling VA

  • Today

    Today: Mostly sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 62. South wind around 6 mph.

    Low: 62 °F

    Mostly Clear

  • Thursday

    Thursday: A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 86. South wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.

    High: 86 °F

    Sunny then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 62. South wind 3 to 7 mph. Chance of precipitation is 30%.

    Low: 62 °F

    Chance
    T-storms then
    Chance
    Showers

  • Friday

    Friday: Sunny, with a high near 88. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 88 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 68.

    Low: 68 °F

    Mostly Clear

  • Saturday

    Saturday: A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 50%.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.

    Low: 58 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
Tonight
Mostly clear, with a low around 62. South wind around 6 mph.
Thursday
A chance of showers between 2pm and 5pm, then a chance of showers and thunderstorms after 5pm. Increasing clouds, with a high near 86. South wind 7 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 62. South wind 3 to 7 mph. Chance of precipitation is 30%.
Friday
Sunny, with a high near 88. Light south wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 68.
Saturday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 58. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Sterling VA
 38.99°N 77.41°W (Elev. 325 ft)
Last Update:
7:29 am EDT Sep 3, 2025
Forecast Valid:
10am EDT Sep 3, 2025-6pm EDT Sep 9, 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