Severe Thunderstorms and Heavy Rainfall for the Southwest; Heat Spreads Across the Center of the Nation

Moisture will continue to move into areas of the West. This will increase showers and thunderstorms coverage and intensity, with the risk of flash flooding and damaging wind gusts. Meanwhile, heat across the Southwest will expand into the center of the nation this weekend into early next week. Trends favor this heat will spread across the Ohio Valley, mid-Atlantic next week. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Overcast

72°F

22°C

Humidity	87%
Wind Speed	S 7 mph
Barometer	30.20 in (1022.2 mb)
Dewpoint	68°F (20°C)
Visibility	10.00 mi
Last update	30 Aug 5:52 am EDT

More Information:

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

Extended Forecast for

Herndon VA

Today
High: 89 °F
Slight Chance
Showers then
Slight Chance
T-storms
Tonight
Low: 71 °F
Partly Cloudy
Monday
High: 92 °F
Mostly Sunny
then Isolated
T-storms
Monday Night
Low: 73 °F
Partly Cloudy
Tuesday
High: 97 °F
Sunny then
Slight Chance
T-storms
Tuesday Night
Low: 76 °F
Partly Cloudy
Wednesday
High: 97 °F
Hot
Wednesday Night
Low: 75 °F
Slight Chance
T-storms
Thursday
High: 95 °F
Mostly Sunny
then Chance
T-storms

Detailed Forecast

Today

A slight chance of showers between 11am and 2pm, then isolated showers and thunderstorms after 2pm. Partly sunny, with a high near 89. Southwest wind 5 to 9 mph. Chance of precipitation is 20%.

Tonight

Partly cloudy, with a low around 71. South wind around 6 mph.

Monday

Isolated showers and thunderstorms after 2pm. Mostly sunny, with a high near 92. Northwest wind 3 to 5 mph. Chance of precipitation is 20%.

Monday Night

Partly cloudy, with a low around 73. East wind around 5 mph becoming light and variable in the evening.

Tuesday

A slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 97. West wind 3 to 7 mph. Chance of precipitation is 20%.

Tuesday Night

Partly cloudy, with a low around 76.

Wednesday

Mostly sunny and hot, with a high near 97.

Wednesday Night

A slight chance of showers and thunderstorms before 2am. Partly cloudy, with a low around 75. Chance of precipitation is 20%.

Thursday

A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 95. Chance of precipitation is 40%.

Thursday Night

A chance of showers and thunderstorms before 2am, then a slight chance of showers. Partly cloudy, with a low around 72. Chance of precipitation is 30%.

Friday

A chance of showers and thunderstorms. Mostly sunny, with a high near 89. Chance of precipitation is 40%.

Friday Night

A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 30%.

Saturday

A slight chance of showers and thunderstorms. Mostly sunny, with a high near 85. Chance of precipitation is 20%.