TODAY DEC30
TEMPERATURE39
HUMIDITY93
PRESSURE101020
WIND COND.260 14.8
  • 4732Tue90%70%
  • 352320%
  • 3121Thu
  • 2715Fri
  • 2414Sat
daynightWeather update from Bellefontaine Regional Airport at
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Weather Quick Facts

  • The highest monthly average temperature in Port Jefferson for August is 73.7 degrees
  • The lowest monthly average temperature in Port Jefferson for February is 24.7 degrees
  • The most monthly precipitation in Port Jefferson occurs in January with 11.1 inches
  • The air quality index in Port Jefferson is 7% better than the national average
  • The pollution index in Port Jefferson is 39% better than the national average

Compare Port Jefferson, OH Weather

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      Port Jefferson 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
      January22°F37°F29°F11.1"
      February17°F32°F25°F2.6"
      March31°F50°F39°F6.7"
      April39°F62°F50°F7.1"
      May48°F74°F61°F1.6"
      June61°F85°F73°F5.4"
      July61°F84°F73°F5.5"
      August63°F86°F74°F10.2"
      September56°F79°F67°F5.9"
      October47°F67°F57°F3.2"
      November33°F52°F43°F5.1"
      December22°F36°F29°F3.3"

      Port Jefferson 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.
      IndexPort JeffersonOhioNational
      Air quality index394042
      Pollution index1,662,3404,472,3862,726,193

      Port Jefferson air quality

      MeasurementTotal
      Days measured364
      Days with good air quality303
      Days with moderate air quality61
      Days w/ poor A.Q. for sensitive groups0
      Days with unhealthy air quality0

      Air quality details

      PollutantTotal
      Arsenic0.003%
      Benzene0.020%
      Carbon Tetrachloride0.003%
      Lead0.030%
      Mercury0.010%

      Average monthly Port Jefferson temperature with heat index

      Port Jefferson monthly precipitation with daily maximum

      Port Jefferson monthly snow depth with daily maximum

      Port Jefferson monthly wind speed information

      Nearby cities with good air quality

      CityPopulationAir Quality IndexNational Avg.
      Minster, OH2,7843922.0%
      Chippewa Park, OH5983922.0%
      Lewistown, OH2653922.0%
      New Bremen, OH2,7983922.0%
      Jackson Center, OH1,5753922.0%
      Port Jefferson, OH4343922.0%

      Cities with similar population

      CityPopulationAir Quality IndexNational Avg.
      Rock Mills, AL4344216.0%
      Clay Springs, AZ4344412.0%
      Mesa, CA434476.0%
      Livermore, IA4341570.0%
      Orient, IA4343922.0%
      Port Jefferson, OH4343922.0%
      Source: The Port Jefferson, 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.