Hazardous Weather Conditions
Current conditions at
Washington/Dulles International Airport, DC (KIAD)
Lat: 38.93°NLon: 77.45°WElev: 312ft.
Overcast
76°F
24°C
| Humidity | 82% |
| Wind Speed | S 8 mph |
| Barometer | 30.10 in (1018.8 mb) |
| Dewpoint | 70°F (21°C) |
| Visibility | 10.00 mi |
| Heat Index | 77°F (25°C) |
| Last update | 16 Aug 7:52 am EDT |
Extended Forecast for
Herndon VA
Today
High: 82 °F
Showers
Tonight
Low: 71 °F
Showers
Monday
High: 88 °F
Mostly Sunny
Monday Night
Low: 69 °F
Partly Cloudy
Tuesday
High: 85 °F
Sunny
Tuesday Night
Low: 65 °F
Mostly Clear
Wednesday
High: 88 °F
Sunny
Wednesday Night
Low: 69 °F
Chance
ShowersThursday
High: 85 °F
Mostly Sunny
then Chance
T-storms
Detailed Forecast
Today
Showers and thunderstorms before 2pm, then showers likely and possibly a thunderstorm between 2pm and 4pm, then scattered showers and thunderstorms after 4pm. High near 82. South wind 7 to 11 mph, with gusts as high as 22 mph. Chance of precipitation is 80%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
Showers and thunderstorms before 2am, then isolated showers between 2am and 3am. Low around 71. South wind 5 to 7 mph becoming southwest after midnight. Chance of precipitation is 80%. New rainfall amounts between three quarters and one inch possible.
Monday
Mostly sunny, with a high near 88. Northwest wind 6 to 10 mph, with gusts as high as 20 mph.
Monday Night
Partly cloudy, with a low around 69. Northwest wind around 7 mph.
Tuesday
Sunny, with a high near 85. Northwest wind 6 to 8 mph.
Tuesday Night
Mostly clear, with a low around 65.
Wednesday
Sunny, with a high near 88.
Wednesday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 69. Chance of precipitation is 30%.
Thursday
A slight chance of showers before 8am, then a chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
Thursday Night
A chance of showers and thunderstorms before 2am, then a slight chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 40%.
Saturday
A chance of showers and thunderstorms. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Additional Forecasts and Information
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Forecast AreaABOUT THIS FORECAST
Point Forecast:
Herndon VA
38.97°N 77.38°W (Elev. 354 ft)
38.97°N 77.38°W (Elev. 354 ft)
7:54 am EDT Aug 16, 2026
8am EDT Aug 16, 2026-6pm EDT Aug 22, 2026
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