TODAY FEB26
TEMPERATURE57
HUMIDITY94
PRESSURE30.17
WIND COND.
  • 8366Sat
  • 8465Sun
  • 8565Mon
  • 7965Tue
  • 8162Wed
daynightWeather update from Titusville at

Key findings

  • The highest monthly average temperature in Port St. John for August is 82 degrees
  • The lowest monthly average temperature in Port St. John for February is 61 degrees
  • The most monthly precipitation in Port St. John occurs in October with 16.9 inches
  • The air quality index in Port St. John is 22% better than the national average
  • The pollution index in Port St. John is 230% worse than the national average

Compare Port St. John, FL Weather

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      Port St. John 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
      January55°F71°F63°F4.8"
      February52°F70°F61°F4.2"
      March57°F74°F65°F6.2"
      April60°F77°F68°F5.0"
      May66°F81°F74°F6.6"
      June72°F86°F79°F9.1"
      July75°F89°F81°F9.2"
      August75°F90°F82°F5.0"
      September74°F86°F79°F13.1"
      October70°F81°F75°F16.9"
      November60°F75°F67°F2.2"
      December55°F71°F62°F4.6"

      Port St. John 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 St. JohnFloridaNational
      Air quality index393550
      Pollution index16,722,70015,391,3445,066,862

      Port St. John air quality information

      MeasurementTotal
      Days measured365
      Days with good air quality296
      Days with moderate air quality63
      Days w/ poor A.Q. for sensitive groups6
      Days with unhealthy air quality0

      Port St. John air quality information

      PollutantTotal
      Arsenic0.050%
      Benzene0.210%
      Carbon Tetrachloride0.030%
      Lead0.190%
      Mercury0.010%

      Average monthly Port St. John temperature with heat index

      Port St. John monthly precipitation with daily maximum

      Port St. John monthly snow depth with daily maximum

      Port St. John monthly wind speed information

      Nearby cities with good air quality

      City, StatePopulationAir Quality IndexNational Avg.
      Cocoa Beach, FL11,4663628%
      Sharpes, FL2,9283628%
      Cocoa West, FL5,1153628%
      Viera East, FL11,0903628%
      Cape Canaveral, FL10,1163628%
      Port St. John, FL11,2233922%

      Cities with similar population

      City, StatePopulationAir Quality IndexNational Avg.
      Scottdale, GA11,221524%
      Maltby, WA11,2214510%
      Sedro-Woolley, WA11,2252452%
      River Forest, IL11,2175510%
      Mendota Heights, MN11,231468%
      Port St. John, FL11,2233922%
      Source: The Port St. John, FL 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.