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

Widespread Showers in the Eastern US; Severe Thunderstorms in the Plains; Heatwave in the Desert Southwest

Widespread showers and thunderstorms across much of the central and eastern U.S. will produce areas of excessive rainfall, especially in the southern Mid-Atlantic states. Scattered severe thunderstorms are expected from Montana into portions of the central/southern Plains this weekend. A heatwave will build in the Desert Southwest, in parts of Arizona, southeastern California, and southern Nevada. Read More >

Hazardous Weather Conditions

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

70°F

21°C

Humidity 93%
Wind Speed S 3 mph
Barometer 30.00 in (1015.6 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 14 Jun 1:52 am EDT
Extended Forecast for

Herndon VA

  • Overnight

    Overnight: A slight chance of showers and thunderstorms before 3am. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 20%.

    Low: 70 °F

    Slight Chance
    T-storms

  • Saturday

    Saturday: A slight chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 82. North wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    High: 82 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely before 5am, then a slight chance of showers. Cloudy, with a low around 65. East wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 65 °F

    Showers
    Likely

  • Sunday

    Sunday: A slight chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 71. East wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 71 °F

    Chance
    Showers then
    Showers

  • Sunday Night

    Sunday Night: Showers and possibly a thunderstorm. Low around 63. East wind around 6 mph. Chance of precipitation is 80%.

    Low: 63 °F

    Showers

  • Monday

    Monday: A chance of showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 71. Chance of precipitation is 50%.

    High: 71 °F

    Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers before 2am. Cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.

    High: 81 °F

    Cloudy then
    Chance
    T-storms

  • Tuesday Night

    Tuesday Night: A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.

    Low: 70 °F

    Chance
    T-storms

Detailed Forecast

Overnight
A slight chance of showers and thunderstorms before 3am. Mostly cloudy, with a low around 70. Light south wind. Chance of precipitation is 20%.
Saturday
A slight chance of showers before 2pm, then a chance of showers and thunderstorms between 2pm and 5pm, then showers likely and possibly a thunderstorm after 5pm. Mostly cloudy, with a high near 82. North wind 3 to 5 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers and thunderstorms likely before 5am, then a slight chance of showers. Cloudy, with a low around 65. East wind around 6 mph. Chance of precipitation is 60%. New rainfall amounts between a quarter and half of an inch possible.
Sunday
A slight chance of showers before 8am, then a chance of showers and thunderstorms between 8am and 2pm, then showers and possibly a thunderstorm after 2pm. High near 71. East wind around 7 mph. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers and possibly a thunderstorm. Low around 63. East wind around 6 mph. Chance of precipitation is 80%.
Monday
A chance of showers, with thunderstorms also possible after 2pm. Cloudy, with a high near 71. Chance of precipitation is 50%.
Monday Night
A chance of showers before 2am. Cloudy, with a low around 65. Chance of precipitation is 30%.
Tuesday
A chance of showers and thunderstorms after 2pm. Mostly cloudy, with a high near 81. Chance of precipitation is 50%.
Tuesday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 70. Chance of precipitation is 40%.
Wednesday
A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 90. Chance of precipitation is 40%.
Wednesday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 73. Chance of precipitation is 30%.
Juneteenth
A chance of showers and thunderstorms. Mostly sunny, with a high near 92. Chance of precipitation is 50%.
Thursday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Friday
Sunny, with a high near 87.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
Last Update:
1:30 am EDT Jun 14, 2025
Forecast Valid:
2am EDT Jun 14, 2025-6pm EDT Jun 20, 2025
 
Forecast Discussion
 
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Additional Resources

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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