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.

• Temperature
• Rainfall
• Sunshine hours

Maximum temperature (°C) at Washington Dulles International Airport

Monthly rainfall (mm) at Washington Dulles International Airport

Hours of sunshine at Washington Dulles International Airport

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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