Washington Dulles International Airport weather averages, D.C.

Washington Dulles International Airport weather averages include temperature, rainfall & sunshine figures for every month of the year. Check the weather at Washington Dulles International Airport (IAD), D.C., USA before you book your next flight.

Maximum temperature (°C) at Washington Dulles International Airport

5
7
13
19
24
28
31
30
26
20
14
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Monthly rainfall (mm) at Washington Dulles International Airport

69
69
85
79
98
87
91
99
89
80
86
84
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Hours of sunshine at Washington Dulles International Airport

5
5
7
8
8
9
9
8
7
6
5
4
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Metric (°C / mm)  |  Imperial (°F / inches)

The D.C. weather averages are provided by Weather2Travel.com. For more weather guides on D.C., USA visit the D.C. weather averages section.

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