TODAY NOV21
TEMPERATURE37
HUMIDITY85
PRESSURE100640
WIND COND.
  • 4439Fri50%60%
  • 5439Sat
  • 5735Sun
  • 6047Mon
  • 5936Tue
daynightWeather update from Manassas, Manassas Regional Airport/Harry P. Davis Field at
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Weather Quick Facts

  • The highest monthly average temperature in Manassas for July is 77.1 degrees
  • The lowest monthly average temperature in Manassas for January is 33.8 degrees
  • The most monthly precipitation in Manassas occurs in September with 11.6 inches
  • The air quality index in Manassas is 12% worse than the national average
  • The pollution index in Manassas is 81% better than the national average

Compare Manassas, VA Weather

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      Manassas 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
      January25°F44°F34°F2.9"
      February25°F47°F35°F2.9"
      March34°F57°F45°F5.0"
      April43°F70°F56°F4.1"
      May54°F77°F65°F4.0"
      June62°F85°F73°F5.4"
      July67°F89°F77°F9.1"
      August65°F87°F75°F5.1"
      September58°F80°F68°F11.6"
      October46°F70°F57°F7.0"
      November35°F58°F45°F6.5"
      December30°F49°F39°F2.7"

      Manassas 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.
      IndexManassasVirginiaNational
      Air quality index475842
      Pollution index520,9361,561,8812,726,193

      Manassas 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
      Arsenic0.020%
      Benzene0.010%
      Carbon Tetrachloride0.002%
      Lead0.050%
      Mercury0.001%

      Average monthly Manassas temperature with heat index

      Manassas monthly precipitation with daily maximum

      Manassas monthly snow depth with daily maximum

      Manassas monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Bull Run Mountain Estates, VA1,7773824.0%
      New Baltimore, VA11,0173824.0%
      Linton Hall, VA41,426476.0%
      South Riding, VA32,526476.0%
      Independent Hill, VA9,514476.0%
      Manassas, VA41,038476.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Oviedo, FL41,0623726.0%
      Hickory, NC41,0674314.0%
      Findlay, OH41,0983922.0%
      Weslaco, TX41,1034216.0%
      Shelton, CT41,1624118.0%
      Manassas, VA41,038476.0%
      Source: The Manassas, 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.