TODAY DEC22
TEMPERATURE28
HUMIDITY51
PRESSURE102850
WIND COND.310 16.6
  • 3212Sun
  • 3625Mon
  • 4529Tue20%
  • 4329
  • 4431Thu
daynightWeather update from Washington/Dulles International Airport, DC at
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Weather Quick Facts

  • The highest monthly average temperature in Chantilly for July is 77.7 degrees
  • The lowest monthly average temperature in Chantilly for January is 34.4 degrees
  • The most monthly precipitation in Chantilly occurs in May with 5.6 inches
  • The air quality index in Chantilly is 12% worse than the national average
  • The pollution index in Chantilly is 92% better than the national average

Compare Chantilly, VA Weather

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      Chantilly Average Temperature

      In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
      MonthTemp. (min)Temp. (max)Temp. (avg)Precipitation
      January24°F46°F34°F2.7"
      February25°F48°F36°F2.1"
      March33°F58°F45°F3.2"
      April43°F71°F56°F3.7"
      May52°F78°F65°F5.6"
      June61°F86°F74°F4.5"
      July66°F90°F78°F4.2"
      August65°F88°F76°F2.8"
      September58°F82°F69°F3.5"
      October46°F71°F58°F5.4"
      November35°F59°F46°F2.6"
      December29°F50°F39°F3.8"

      Chantilly air quality index & pollution index

      In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
      IndexChantillyVirginiaNational
      Air quality index475842
      Pollution index205,2161,561,8812,726,193

      Chantilly air quality

      MeasurementTotal
      Days measured365
      Days with good air quality209
      Days with moderate air quality145
      Days w/ poor A.Q. for sensitive groups10
      Days with unhealthy air quality1

      Air quality details

      PollutantTotal
      Arsenic0.001%
      Benzene0.002%
      Carbon Tetrachloride0.001%
      Lead0.000%
      Mercury0.000%

      Average monthly Chantilly temperature with heat index

      Chantilly monthly precipitation with daily maximum

      Chantilly monthly snow depth with daily maximum

      Chantilly monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      New Baltimore, VA11,0173824.0%
      Bull Run Mountain Estates, VA1,7773824.0%
      Woodburn, VA10,0813824.0%
      Manassas Park, VA17,548476.0%
      Dulles Town Center, VA5,362476.0%
      Chantilly, VA23,820476.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Saginaw, TX23,835512.0%
      Calabasas, CA23,8427244.0%
      Wadsworth, OH23,7894314.0%
      Faribault, MN23,8533726.0%
      Columbus, MS23,8533530.0%
      Chantilly, VA23,820476.0%
      Source: The Chantilly, VA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.