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

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Partly Cloudy

20°C

68°F

Humidity 76%
Wind Speed S 9 km/h
Barometer 1015.0 mb (29.98 in)
Dewpoint 16°C (60°F)
Visibility 16 km
Last update 22 May 12:52 am EDT
Extended Forecast for

Reston VA

  • Overnight

    Overnight: Partly cloudy, with a low around 17. South wind around 10 km/h.

    Low: 17 °C

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 31. South wind 8 to 11 km/h.

    High: 31 °C

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 20. South wind 5 to 10 km/h. Chance of precipitation is 40%.

    Low: 20 °C

    Chance
    T-storms

  • Thursday

    Thursday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 28. Calm wind becoming west 5 to 10 km/h in the morning. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible.

    High: 28 °C

    Slight Chance
    T-storms 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 18. Calm wind. Chance of precipitation is 60%.

    Low: 18 °C

    Showers
    Likely then
    Chance
    T-storms

  • Friday

    Friday: A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 28. Chance of precipitation is 40%.

    High: 28 °C

    Slight Chance
    T-storms then
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 19. Chance of precipitation is 50%.

    Low: 19 °C

    Chance
    T-storms

  • Saturday

    Saturday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 28. Chance of precipitation is 60%.

    High: 28 °C

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 18. Chance of precipitation is 60%.

    Low: 18 °C

    Showers
    Likely then
    Chance
    T-storms

Detailed Forecast

Overnight
Partly cloudy, with a low around 17. South wind around 10 km/h.
Wednesday
Mostly sunny, with a high near 31. South wind 8 to 11 km/h.
Wednesday Night
A chance of showers and thunderstorms, mainly between 8pm and 2am. Partly cloudy, with a low around 20. South wind 5 to 10 km/h. Chance of precipitation is 40%.
Thursday
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 28. Calm wind becoming west 5 to 10 km/h in the morning. Chance of precipitation is 60%. New rainfall amounts between 7.5 mm and 1 cm possible.
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 18. Calm wind. Chance of precipitation is 60%.
Friday
A slight chance of showers, then a chance of showers and thunderstorms after 11am. Mostly sunny, with a high near 28. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 19. Chance of precipitation is 50%.
Saturday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 28. Chance of precipitation is 60%.
Saturday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am. Partly cloudy, with a low around 18. Chance of precipitation is 60%.
Sunday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 28. Chance of precipitation is 40%.
Sunday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 18. Chance of precipitation is 60%.
Memorial Day
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 26. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 17. Chance of precipitation is 60%.
Tuesday
A chance of showers. Partly sunny, with a high near 25. Chance of precipitation is 40%.
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Map Legend

ABOUT THIS FORECAST

 
Point Forecast:
Reston VA
 38.95°N 77.36°W (Elev. 446 m)
Last Update:
10:30 pm EDT May 21, 2024
Forecast Valid:
1am EDT May 22, 2024-6pm EDT May 28, 2024
 
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