Heavy Rain From the Central Plains to the Mid-Atlantic; Heat Wave Begins This Weekend

Strong to severe thunderstorms and heavy rain will impact portions of the central Plains into the Upper Midwest and the Mid-Atlantic through the weekend. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend and continuing through next week. The heat may reach dangerous levels, particularly mid to late next week. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

75°F

24°C

Humidity	96%
Wind Speed	Calm
Barometer	30.10 in (1018.9 mb)
Dewpoint	74°F (23°C)
Visibility	10.00 mi
Last update	18 Jul 11:52 pm EDT

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

3 Miles SSW Herndon VA

Overnight
Low: 71 °F
Chance
T-storms and
Patchy Fog
Saturday
High: 86 °F
Patchy Fog
then Showers
Likely
Saturday Night
Low: 72 °F
Showers
Likely then
Slight Chance
T-storms
Sunday
High: 92 °F
Partly Sunny
then Chance
T-storms
Sunday Night
Low: 69 °F
Chance
T-storms then
Partly Cloudy
Monday
High: 85 °F
Sunny
Monday Night
Low: 65 °F
Partly Cloudy
Tuesday
High: 85 °F
Mostly Sunny
Tuesday Night
Low: 67 °F
Partly Cloudy

Detailed Forecast

Overnight

A chance of showers and thunderstorms, mainly after 1am. Patchy fog before 1am, then patchy fog after 3am. Otherwise, mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 30%.

Saturday

A chance of showers and thunderstorms, then showers likely and possibly a thunderstorm after 4pm. Patchy fog before 8am. Otherwise, mostly cloudy, with a high near 86. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Saturday Night

Showers and thunderstorms likely, mainly before 8pm. Mostly cloudy, with a low around 72. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

Sunday

A chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 92. West wind 3 to 8 mph. Chance of precipitation is 40%.

Sunday Night

A chance of showers and thunderstorms before 8pm. Partly cloudy, with a low around 69. Northwest wind around 6 mph. Chance of precipitation is 30%.

Monday

Sunny, with a high near 85.

Monday Night

Partly cloudy, with a low around 65.

Tuesday

Mostly sunny, with a high near 85.

Tuesday Night

Partly cloudy, with a low around 67.