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.

Mostly Cloudy

36°C

96°F

Humidity 43%
Wind Speed NW 13 km/h
Barometer 1019.7 mb (30.12 in)
Dewpoint 21°C (70°F)
Visibility 16 km
Heat Index39°C (103°F)
Last update 23 Jun 3:52 pm EDT
Extended Forecast for

Great Falls VA

Extreme Heat Warning until June 23, 09:00pm
Extreme Heat Warning June 24, 11:00am until June 24, 09:00pm
Click here for hazard details and duration
Extreme Heat Warning
Extreme Heat Warning
  •  
    Extreme Heat Warning until June 23, 09:00pm

    NOW until 9:00pm Mon

    Extreme Heat Warning

  • This Afternoon

    High: 37 °C

    Hot

  • Tonight

    Tonight: Mostly clear, with a low around 26. Calm wind.

    Low: 26 °C

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 37. Heat index values as high as 43. Northwest wind 5 to 10 km/h.

    High: 37 °C

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 25. Calm wind.

    Low: 25 °C

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 36. Northwest wind 3 to 8 km/h. Chance of precipitation is 30%.

    High: 36 °C

    Sunny then
    Chance
    T-storms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 24. Chance of precipitation is 30%.

    Low: 24 °C

    Chance
    T-storms then
    Chance
    Showers

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 35. Chance of precipitation is 60%.

    High: 35 °C

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.

    Low: 23 °C

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

This Afternoon
Sunny and hot, with a high near 37. Heat index values as high as 42. Northwest wind around 10 km/h.
Tonight
Mostly clear, with a low around 26. Calm wind.
Tuesday
Sunny and hot, with a high near 37. Heat index values as high as 43. Northwest wind 5 to 10 km/h.
Tuesday Night
Mostly clear, with a low around 25. Calm wind.
Wednesday
A chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 36. Northwest wind 3 to 8 km/h. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 24. Chance of precipitation is 30%.
Thursday
Showers likely and possibly a thunderstorm after 2pm. Mostly sunny, with a high near 35. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Mostly cloudy, with a low around 23. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 32. Chance of precipitation is 50%.
Friday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 32. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 23. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 33. Chance of precipitation is 40%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 23. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Mostly sunny, with a high near 33.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Great Falls VA
 39.01°N 77.29°W (Elev. 348 m)
Last Update:
4:31 pm EDT Jun 23, 2025
Forecast Valid:
4pm EDT Jun 23, 2025-6pm EDT Jun 30, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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