Areas of Dangerous Heat and Heavy Rainfall Today

Hot temperatures and high humidity are forecast to continue across the mid-Mississippi Valley today. Heat Advisories remain in effect. Heavy to excessive rainfall today could bring areas of flooding to parts of the northern High Plains and Midwest into the Ohio Valley. Flood Watches remain in effect. Read More >

Current conditions at

Washington/Dulles International Airport, DC (KIAD)

Lat: 38.93°NLon: 77.45°WElev: 312ft.

Mostly Cloudy

80°F

27°C

Humidity	71%
Wind Speed	SW 8 mph
Barometer	29.88 in (1011.5 mb)
Dewpoint	70°F (21°C)
Visibility	10.00 mi
Heat Index	83°F (28°C)
Last update	20 Sep 5:52 pm EDT

More Information:

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

Extended Forecast for

2 Miles ESE Great Falls VA

Tonight
Low: 63 °F
Scattered
T-storms then
Isolated
Showers
Monday
High: 74 °F
Mostly Cloudy
then Isolated
Showers
Monday Night
Low: 59 °F
Showers
Tuesday
High: 65 °F
Showers
Tuesday Night
Low: 54 °F
Showers
Likely
Wednesday
High: 62 °F
Chance
Showers
Wednesday Night
Low: 53 °F
Chance
Showers
Thursday
High: 62 °F
Chance
Showers
Thursday Night
Low: 51 °F
Mostly Cloudy

Detailed Forecast

Tonight

Scattered showers and thunderstorms before 11pm, then isolated showers between 11pm and 2am. Mostly cloudy, with a low around 63. West wind around 6 mph becoming light and variable. Chance of precipitation is 50%.

Monday

Isolated showers after 2pm. Mostly cloudy, with a high near 74. Northeast wind 7 to 11 mph. Chance of precipitation is 20%.

Monday Night

Showers, mainly after 8pm. Low around 59. East wind around 7 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

Tuesday

Showers and possibly a thunderstorm. High near 65. Northeast wind 10 to 14 mph, with gusts as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

Tuesday Night

Showers likely. Cloudy, with a low around 54. Northeast wind around 11 mph. Chance of precipitation is 70%.

Wednesday

A chance of showers. Mostly cloudy, with a high near 62. Chance of precipitation is 50%.

Wednesday Night

A chance of showers. Mostly cloudy, with a low around 53. Chance of precipitation is 40%.

Thursday

A chance of showers, mainly before 2pm. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.

Thursday Night

Mostly cloudy, with a low around 51.

Friday

Mostly sunny, with a high near 64.