TODAY NOV21
TEMPERATURE38
HUMIDITY79
PRESSURE100710
WIND COND.
  • 5233
  • 4938Fri20%
  • 5737Sat
  • 6140Sun
  • 6551Mon
daynightWeather update from Ashland, Hanover County Municipal Airport at
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Weather Quick Facts

  • The highest monthly average temperature in John Marshall for July is 79.8 degrees
  • The lowest monthly average temperature in John Marshall for January is 39 degrees
  • The most monthly precipitation in John Marshall occurs in August with 5.4 inches
  • The air quality index in John Marshall is 5% worse than the national average
  • The pollution index in John Marshall is 96% worse than the national average

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      John Marshall 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°F52°F39°F3.2"
      February29°F54°F41°F2.5"
      March37°F63°F49°F3.7"
      April46°F75°F60°F3.7"
      May55°F80°F67°F4.2"
      June65°F89°F76°F4.5"
      July69°F92°F80°F4.6"
      August68°F90°F78°F5.4"
      September61°F84°F72°F4.7"
      October49°F74°F61°F4.2"
      November38°F64°F50°F3.7"
      December33°F55°F43°F4.3"

      John Marshall 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.
      IndexJohn MarshallRichmondVirginia
      Air quality index444458
      Pollution index5,336,07093,6861,561,881

      John Marshall air quality

      MeasurementTotal
      Days measured365
      Days with good air quality272
      Days with moderate air quality93
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.001%
      Benzene0.010%
      Carbon Tetrachloride0.000%
      Lead0.000%
      Mercury0.000%

      Average monthly John Marshall temperature with heat index

      John Marshall monthly precipitation with daily maximum

      John Marshall monthly snow depth with daily maximum

      John Marshall monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Sandston, VA6,8334412.0%
      Woodlake, VA7,4044412.0%
      Bensley, VA6,0444412.0%
      Glen Allen, VA14,8424412.0%
      Manchester, VA11,8144412.0%
      Richmond, VA229,2334412.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Boise, ID228,0573628.0%
      Windsor, ON230,583n/a 
      Hialeah, FL233,8764118.0%
      Fremont, CA234,8294314.0%
      Richmond, BC222,489n/a 
      Richmond, VA229,2334412.0%
      Source: The John Marshall, Richmond, 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.