TODAY NOV25
TEMPERATURE40
HUMIDITY86
PRESSURE101490
WIND COND.140 13
  • 5936Mon30%50%
  • 4532Tue
  • 4634Wed60%
  • 432560%40%
  • 3419Fri30%
daynightWeather update from Dayton, Cox Dayton International Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Mount Vernon for July is 74.6 degrees
  • The lowest monthly average temperature in Mount Vernon for January is 29.4 degrees
  • The most monthly precipitation in Mount Vernon occurs in July with 8.6 inches
  • The air quality index in Mount Vernon is 12% worse than the national average
  • The pollution index in Mount Vernon is 323% worse than the national average

Compare Dayton, OH Weather

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      Mount Vernon 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
      January21°F38°F29°F4.7"
      February22°F40°F30°F4.9"
      March33°F54°F42°F6.6"
      April42°F67°F54°F6.8"
      May52°F75°F64°F6.8"
      June61°F83°F72°F7.3"
      July64°F85°F75°F8.6"
      August63°F85°F74°F6.8"
      September56°F79°F66°F6.6"
      October44°F67°F55°F6.5"
      November33°F55°F43°F6.1"
      December27°F43°F34°F6.1"

      Mount Vernon 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.
      IndexMount VernonDaytonOhio
      Air quality index474740
      Pollution index11,539,30011,539,3004,472,386

      Mount Vernon air quality

      MeasurementTotal
      Days measured365
      Days with good air quality213
      Days with moderate air quality152
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.210%
      Benzene0.110%
      Carbon Tetrachloride0.060%
      Lead0.110%
      Mercury0.050%

      Average monthly Mount Vernon temperature with heat index

      Mount Vernon monthly precipitation with daily maximum

      Mount Vernon monthly snow depth with daily maximum

      Mount Vernon monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Spring Valley, OH8554314.0%
      Donnelsville, OH3294510.0%
      Holiday Valley, OH1,5734510.0%
      North Hampton, OH4134510.0%
      New Carlisle, OH5,5774510.0%
      Dayton, OH140,444476.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Miramar, FL140,4794118.0%
      Cambridge, ON140,221n/a 
      St. Catharines, ON140,913n/a 
      Fullerton, CA141,0617244.0%
      Denton, TX139,734512.0%
      Dayton, OH140,444476.0%
      Source: The Mount Vernon, Dayton, OH 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.