TODAY NOV21
TEMPERATURE54
HUMIDITY41
PRESSURE100170
WIND COND.260 13
  • 4338Fri40%50%
  • 5541Sat
  • 5737Sun
  • 6148Mon
  • 5937Tue30%
daynightWeather update from Fort Belvoir at
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Weather Quick Facts

  • The highest monthly average temperature in Mason Neck for July is 78.1 degrees
  • The lowest monthly average temperature in Mason Neck for January is 35 degrees
  • The most monthly precipitation in Mason Neck occurs in September with 11.4 inches
  • The air quality index in Mason Neck is 12% worse than the national average
  • The pollution index in Mason Neck is 2% worse than the national average

Compare Mason Neck, VA Weather

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      Mason Neck 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
      January26°F45°F35°F4.6"
      February27°F48°F37°F4.1"
      March36°F59°F47°F5.4"
      April45°F70°F57°F6.6"
      May54°F77°F66°F7.2"
      June63°F86°F74°F10.2"
      July67°F89°F78°F8.7"
      August66°F87°F76°F7.4"
      September59°F81°F69°F11.4"
      October48°F70°F58°F8.8"
      November37°F59°F47°F5.7"
      December31°F50°F40°F5.9"

      Mason Neck 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.
      IndexMason NeckVirginiaNational
      Air quality index475842
      Pollution index2,776,5901,561,8812,726,193

      Mason Neck 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
      Arsenic0.070%
      Benzene0.020%
      Carbon Tetrachloride0.010%
      Lead0.020%
      Mercury0.030%

      Average monthly Mason Neck temperature with heat index

      Mason Neck monthly precipitation with daily maximum

      Mason Neck monthly snow depth with daily maximum

      Mason Neck monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Rose Hill CDP (Lee County), VA708476.0%
      West Springfield, VA23,775476.0%
      Mount Vernon, VA13,490476.0%
      Fair Oaks, VA34,466476.0%
      Manassas Park, VA17,548476.0%
      Mason Neck, VA1,938476.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Homerville, GA1,9382648.0%
      Grandview Plaza, KS1,9383236.0%
      Westernport, MD1,9383628.0%
      Chuluota, FL1,9393922.0%
      Carbon Cliff, IL1,937468.0%
      Mason Neck, VA1,938476.0%
      Source: The Mason Neck, 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.