Washington Dc Dulles Int'l Ar
Weather Station of the U.S. Weather Service

Located in Washington Dc/dull in Loudoun County, Virginia, Washington Dc Dulles Int'l Ar is at an elevation of 290 feet and was established as a weather station on 17 Nov 1962.

From 1971 to 2000, the following average readings were recorded:

 - - - - - - - - - JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC YEAR Average High....... 41.4 45.5 55.0 65.9 74.6 82.8 87.4 85.9 78.9 67.7 56.5 45.9 65.6 Average Low........ 21.9 24.1 31.8 40.2 49.9 59.0 64.0 62.8 55.6 42.3 33.8 26.0 42.6 Monthly Precipitn.. 3.05 2.77 3.55 3.22 4.22 4.07 3.57 3.78 3.82 3.37 3.31 3.07 41.80 Heating Degree Days 1025 847 670 362 139 21 1 4 60 323 589 882 4923 Cooling Degree Days 0 0 4 11 60 203 345 302 132 15 3 0 1075 

Location: Washington Dc/dull Virginia

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