Point Forecast: Chantilly VA
 38.88N 77.4W (Elev. 358 ft)
Last Update: 4:30 am 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)060708091011121314151617181920212223000102030405
Temperature (°F)737375777982848687888785848381797877767675757474
Dewpoint (°F)727374747575767576757576757575767575757574757474
Heat Index (°F)7577798993959898969492908779787776767575
Surface Wind (mph)222222335555555333333335
Wind DirNNNNNNNNWSWSSSSESESSSSSSSSSS
Gust
Sky Cover (%)785348584448333153606870605954454651535351333742
Precipitation Potential (%)1096255101729405255403916161916443467
Relative Humidity (%)9710097908879777070666875747782919194979797100100100
Rain--------------SChcChcChcChcLklyChcChcSChcSChcSChcSChc------------
Thunder--------------SChcChcChcChcChcChcChcSChcSChcSChc--------------

Date07/17
Hour (EDT)060708091011121314151617181920212223000102030405
Temperature (°F)737476798284868788888786858381797877777777777676
Dewpoint (°F)737475767778787877777676767676767575757474747474
Heat Index (°F)76799095981001001009896949187797877777777777676
Surface Wind (mph)56667891010101010998877777777
Wind DirSSSSWSWSSSSSSSSSSSSSSSSSSWSW
Gust
Sky Cover (%)665151756758657380808080808079757066676768605345
Precipitation Potential (%)10102626262626266969696969692222222222226666
Relative Humidity (%)10010097918582777570707072758085919194949090909494
Rain----ChcChcChcChcChcChcLklyLklyLklyLklyLklyLklySChcSChcSChcSChcSChcSChc--------
Thunder----------ChcChcChcLklyLklyLklyLklyLklyLklySChcSChcSChcSChcSChcSChc--------

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