Washington Dulles Airport (IAD) Weather 06/29/2025
Tonight
71
Isolated T-storms then Isolated Showers
Monday
91
Slight Chance Showers then T-storms Likely
Monday Night
75
Showers Likely then Partly Cloudy
Tuesday
90
Chance Showers then Heavy Rain
Tuesday Night
69
Heavy Rain then Chance T-storms
Wednesday
87
Sunny
Wednesday Night
68
Mostly Clear
Thursday
89
Sunny
Thursday Night
66
Mostly Clear
Independence Day
86
Sunny
Friday Night
64
Mostly Clear
Saturday
89
Sunny
Saturday Night
69
Partly Cloudy
Weekly Forecast
Tonight
Isolated showers and thunderstorms before 11pm, then isolated showers after 2am. Mostly cloudy, with a low around 71. Calm wind. Chance of precipitation is 20%.
Monday
Showers and thunderstorms likely, mainly before 5pm, then showers likely and possibly a thunderstorm after 5pm. Partly sunny, with a high near 91. Heat index values as high as 102. Calm wind becoming south 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Monday Night
Showers and thunderstorms likely, mainly before 10pm. Mostly cloudy, with a low around 75. South wind around 7 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers and possibly a thunderstorm after 2pm. Some of the storms could produce heavy rainfall. High near 90. Southwest wind around 10 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 and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 2am, then a slight chance of showers after 2am. Some of the storms could produce heavy rainfall. Low around 69. Southwest wind 3 to 6 mph. Chance of precipitation is 80%.
Wednesday
Sunny, with a high near 87.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 89.
Thursday Night
Mostly clear, with a low around 66.
Independence Day
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 64.
Saturday
Sunny, with a high near 89.
Saturday Night
Partly cloudy, with a low around 69.