An Enduring Heat Wave Begins for Texas and Southern Plains

Starting today, a blazing Heat Wave will consume much of the Southern Plains and Lower MS Valley through early next week, especially for TX. Numerous Excessive Heat Warnings, Watches and Advisories are in effect for the mid-section of TX and OK and these hazards will only become more widespread. Expect record Highs temps and very dangerous Heat Indices, both surging well north of triple digits. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Partly Cloudy

83°F

28°C

Humidity 38%
Wind Speed N 9 mph
Barometer 29.98 in (1014.8 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 18 Jul 1:52 pm EDT
Extended Forecast for

Herndon VA

  • This
    Afternoon

    This Afternoon: Mostly sunny, with a high near 84. North wind around 8 mph.

    Mostly Sunny

    High: 84 °F

  • Tonight

    Tonight: Mostly clear, with a low around 62. North wind 3 to 6 mph.

    Mostly Clear

    Low: 62 °F

  • Thursday

    Thursday: Sunny, with a high near 85. North wind 3 to 5 mph.

    Sunny

    High: 85 °F

  • Thursday
    Night

    Thursday Night: Mostly clear, with a low around 65. East wind around 5 mph becoming calm  in the evening.

    Mostly Clear

    Low: 65 °F

  • Friday

    Friday: Sunny, with a high near 87. Calm wind becoming southeast 5 to 8 mph in the morning.

    Sunny

    High: 87 °F

  • Friday
    Night

    Friday Night: A slight chance of showers.  Partly cloudy, with a low around 68. Chance of precipitation is 20%.

    Slight Chance
    Showers

    Low: 68 °F

  • Saturday

    Saturday: A chance of showers and thunderstorms.  Partly sunny, with a high near 81. Chance of precipitation is 50%.

    Chance
    T-storms

    High: 81 °F

  • Saturday
    Night

    Saturday Night: A chance of showers.  Mostly cloudy, with a low around 67. Chance of precipitation is 50%.

    Chance
    Showers

    Low: 67 °F

  • Sunday

    Sunday: Showers likely and possibly a thunderstorm.  Mostly cloudy, with a high near 83. Chance of precipitation is 70%.

    Showers
    Likely

    High: 83 °F

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 84. North wind around 8 mph.
Tonight
Mostly clear, with a low around 62. North wind 3 to 6 mph.
Thursday
Sunny, with a high near 85. North wind 3 to 5 mph.
Thursday Night
Mostly clear, with a low around 65. East wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 87. Calm wind becoming southeast 5 to 8 mph in the morning.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 68. Chance of precipitation is 20%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 81. Chance of precipitation is 50%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 67. Chance of precipitation is 50%.
Sunday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 83. Chance of precipitation is 70%.
Sunday Night
Showers likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Mostly cloudy, with a high near 85. Chance of precipitation is 60%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Tuesday
A chance of showers and thunderstorms. Partly sunny, with a high near 87. Chance of precipitation is 50%.
Click Map For Forecast
Point Forecast:
Herndon VA
 38.97°N 77.38°W (Elev. 354 ft)
1:54 pm EDT Jul 18, 2018
2pm EDT Jul 18, 2018-6pm EDT Jul 24, 2018
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database