TODAY MAY30
TEMPERATURE74
HUMIDITY41
PRESSURE101660
WIND COND.
  • 7353Fri
  • 8062Sat
  • 7962Sun30%
  • 8364Mon
  • 8466Tue30%
daynightWeather update from Washington/Dulles International Airport, DC at
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Weather Quick Facts

  • The highest monthly average temperature in Reston for July is 77.7 degrees
  • The lowest monthly average temperature in Reston for January is 34.4 degrees
  • The most monthly precipitation in Reston occurs in May with 5.6 inches
  • The air quality index in Reston is 12% worse than the national average
  • The pollution index in Reston is 86% better than the national average

Compare Reston, VA Weather

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      Reston 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"

      Reston 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.
      IndexRestonVirginiaNational
      Air quality index475842
      Pollution index380,1241,561,8812,726,193

      Reston 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

      Reston air quality information

      PollutantTotal
      Arsenic0.003%
      Benzene0.005%
      Carbon Tetrachloride0.001%
      Lead0.001%
      Mercury0.000%

      Average monthly Reston temperature with heat index

      Reston monthly precipitation with daily maximum

      Reston monthly snow depth with daily maximum

      Reston monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Woodburn, VA10,0813824.0%
      Arcola, VA1,761476.0%
      South Riding, VA32,526476.0%
      Loch Lomond, VA4,325476.0%
      Gaithersburg, MD67,878476.0%
      Reston, VA61,418476.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      National City, CA61,3426428.0%
      Spring, TX61,514524.0%
      Burnsville, MN61,536468.0%
      Taylor, MI61,1645612.0%
      Moore, OK61,683484.0%
      Reston, VA61,418476.0%
      Source: The Reston, 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.