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.

Overcast

73°F

23°C

Humidity 87%
Wind Speed Calm
Barometer 29.97 in (1014.4 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 20 Aug 3:52 am EDT
Extended Forecast for

5 Miles NW Catharpin VA

  • Overnight

    Overnight: Isolated showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 20%.

    Low: 70 °F

    Isolated
    T-storms

  • Thursday

    Thursday: Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. Some of the storms could produce heavy rainfall. High near 85. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 85 °F

    Isolated
    T-storms then
    Heavy Rain

  • Thursday Night

    Thursday Night: Showers and thunderstorms likely, mainly before 9pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 66. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 66 °F

    Showers
    Likely and
    Patchy Fog
    then Patchy
    Fog

  • Friday

    Friday: A chance of showers, mainly after 5pm. Mostly sunny, with a high near 81. North wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 30%.

    High: 81 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 70%.

    Low: 67 °F

    Showers
    Likely

  • Saturday

    Saturday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.

    High: 83 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.

    Low: 66 °F

    Showers
    Likely then
    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.

    High: 83 °F

    Mostly Sunny
    then Slight
    Chance
    T-storms

  • Sunday Night

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

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
Isolated showers, with thunderstorms also possible after 5am. Mostly cloudy, with a low around 70. Calm wind. Chance of precipitation is 20%.
Thursday
Scattered showers and thunderstorms, then showers and possibly a thunderstorm after 3pm. Some of the storms could produce heavy rainfall. High near 85. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Thursday Night
Showers and thunderstorms likely, mainly before 9pm. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 66. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
A chance of showers, mainly after 5pm. Mostly sunny, with a high near 81. North wind around 6 mph becoming light and variable in the afternoon. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 8pm. Mostly cloudy, with a low around 67. Calm wind. Chance of precipitation is 70%.
Saturday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Mostly cloudy, with a high near 83. Chance of precipitation is 60%.
Saturday Night
Showers and thunderstorms likely before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%.
Sunday
A slight chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 83. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 63.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Mostly sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 64.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
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ABOUT THIS FORECAST

 
Point Forecast:
5 Miles NW Catharpin VA
 38.9°N 77.62°W (Elev. 348 ft)
Last Update:
4:09 am EDT Aug 20, 2026
Forecast Valid:
4am EDT Aug 20, 2026-6pm EDT Aug 26, 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