Washington Dulles Airport (IAD) Weather 07/13/2026
Tonight
71
Slight Chance T-storms then Slight Chance Showers
Wednesday
99
Sunny then Slight Chance T-storms
Wednesday Night
75
Mostly Clear
Thursday
102
Hot
Thursday Night
76
Mostly Clear
Friday
101
Sunny then Slight Chance T-storms
Friday Night
77
Partly Cloudy
Independence Day
100
Sunny then Chance T-storms
Saturday Night
74
Chance T-storms
Sunday
94
Mostly Sunny then Showers Likely
Sunday Night
72
Showers Likely
Monday
89
Chance Showers then Showers Likely
Monday Night
70
Showers Likely
Weekly Forecast
Tonight
A slight chance of showers and thunderstorms before 11pm, then a slight chance of showers between 11pm and 1am. Partly cloudy, with a low around 71. South wind 7 to 10 mph. Chance of precipitation is 20%.
Wednesday
A slight chance of showers between 1pm and 2pm, then a slight chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 99. Heat index values as high as 107. Southwest wind 3 to 6 mph. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 75. South wind around 6 mph.
Thursday
Sunny and hot, with a high near 102. Heat index values as high as 110. Light west wind.
Thursday Night
Mostly clear, with a low around 76. South wind around 5 mph becoming calm in the evening.
Friday
A slight chance of showers and thunderstorms after 2pm. Sunny and hot, with a high near 101. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 77.
Independence Day
A chance of showers and thunderstorms after 2pm. Mostly sunny and hot, with a high near 100. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms before 2am. Mostly cloudy, with a low around 74. Chance of precipitation is 30%.
Sunday
Showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 94. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 72. Chance of precipitation is 60%.
Monday
Showers likely and possibly a thunderstorm. Partly sunny, with a high near 89. Chance of precipitation is 60%.
Monday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 70. Chance of precipitation is 60%.