Point Forecast: Washington-Dulles International Airport VA
 38.95N 77.44W (Elev. 285 ft)
Last Update: 1:31 pm EDT Jul 15, 2025
Tabular Forecast
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Weather ElementsFire WeatherAviation Weather
Temperature (°F)
Dewpoint (°F)
Heat Index (°F)

Surface Wind  
Sky Cover (%)
Precipitation Potential (%)
Relative Humidity (%)

Rain
Thunder
Fog
Mixing Height  
Trans. Wind  
Vent Rate (x1000 mph-ft)
Atmospheric Dispersion Index
Low Visibility Occurrence Risk Index
Ceiling Height
Visibility

48-Hour Period Starting:       Back 2 Days  

Date07/1507/16
Hour (EDT)171819202122230001020304050607080910111213141516
Temperature (°F)898886847978777776757575747374778082848688888887
Dewpoint (°F)767676767676767675757574747374767777777878787877
Heat Index (°F)1009996937978777776757575778790949810210210299
Surface Wind (mph)535332222222223556678999
Wind DirSSESSESESSSSSSSSSSSSSSSSSSSW
Gust
Sky Cover (%)695961493933494057536055566159665465735955657181
Precipitation Potential (%)37312495677554555546981627364966
Relative Humidity (%)66687277919497979710010097100100100979185807772727272
RainChcChcSChc--------------------------------SChcChcChcChcLkly
ThunderChcChcSChc--------------------------------SChcSChcChcChcLkly
Fog--------------------------Patchy--------------------

Date07/17
Hour (EDT)171819202122230001020304050607080910111213141516
Temperature (°F)858381807978787877777776767677788185889092939392
Dewpoint (°F)777676767676767675757574747575767675757575757474
Heat Index (°F)96918786797878787777777676767778879498101103105103102
Surface Wind (mph)988766666666666667778888
Wind DirSWSWSSSSSSSSSSWSWSWSWSWSWSWSWSWWWWSW
Gust
Sky Cover (%)888073746667686767666665655850434138364350575757
Precipitation Potential (%)716059212121212121444444999999363636
Relative Humidity (%)778085889194949494949494949794948572666258565456
RainLklyLklyLklySChcSChcSChcSChcSChcSChc------------------------ChcChcChc
ThunderLklyLklyLklySChcSChcSChcSChcSChcSChc------------------------ChcChcChc
Fog------------------------------------------------

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