TODAY MAR29
TEMPERATURE45
HUMIDITY42
PRESSURE101460
WIND COND.330 13
  • 6140Fri
  • 6551Sat30%
  • 6949Sun
  • 6251Mon70%80%
  • 6850Tue80%60%
daynightWeather update from Washington/Reagan National Airport, DC at
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Weather Quick Facts

  • The highest monthly average temperature in Glencarlyn for July is 80.8 degrees
  • The lowest monthly average temperature in Glencarlyn for January is 37.1 degrees
  • The most monthly precipitation in Glencarlyn occurs in June with 5.3 inches
  • The air quality index in Glencarlyn is 12% worse than the national average
  • The pollution index in Glencarlyn is 92% better than the national average

Compare Arlington, VA Weather

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      Glencarlyn 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
      January28°F47°F37°F2.7"
      February29°F50°F38°F2.3"
      March37°F60°F47°F3.2"
      April47°F71°F58°F3.4"
      May56°F78°F67°F4.6"
      June67°F87°F77°F5.3"
      July72°F91°F81°F4.2"
      August70°F90°F79°F3.2"
      September63°F83°F72°F3.5"
      October52°F72°F61°F5.0"
      November40°F61°F50°F2.5"
      December33°F52°F42°F3.8"

      Glencarlyn 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.
      IndexGlencarlynArlingtonVirginia
      Air quality index474758
      Pollution index208,434208,4341,561,881

      Glencarlyn air quality information

      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

      Glencarlyn air quality information

      PollutantTotal
      Arsenic0.003%
      Benzene0.002%
      Carbon Tetrachloride0.001%
      Lead0.001%
      Mercury0.000%

      Average monthly Glencarlyn temperature with heat index

      Glencarlyn monthly precipitation with daily maximum

      Glencarlyn monthly snow depth with daily maximum

      Glencarlyn monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Calverton, MD17,034476.0%
      Camp Springs, MD21,829476.0%
      Friendly, MD9,984476.0%
      National Harbor, MD3,998476.0%
      Belle Haven town, VA562476.0%
      Arlington, VA236,434476.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Fremont, CA234,8294314.0%
      Garland, TX238,622512.0%
      Hialeah, FL233,8764118.0%
      Irving, TX240,475512.0%
      Regina, SK241,465n/a 
      Arlington, VA236,434476.0%
      Source: The Glencarlyn, Arlington, 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.