TODAY SEP25
TEMPERATURE86
HUMIDITY62
PRESSURE30.06
WIND COND.90 6.9
  • 9175Wed30%30%
  • 9075Thu20%20%
  • 9276Fri30%30%
  • 8875Sat20%20%
  • 8875Sun20%20%
daynightWeather update from Titusville at
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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"

Did you know?

  • 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 27% better than the national average.
  • The pollution index in Port St. John is 230% worse than the national average.

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Compare Port St. John, FL Weather To Other Cities

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 index363550
Pollution index16,722,70015,391,3445,066,862

Port St. John air quality information

MeasurementTotal
Days measured365
Days with good air quality326
Days with moderate air quality39
Days w/ poor A.Q. for sensitive groups
Days with unhealthy air quality

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, FL11,4663530%
Rockledge, FL26,1443530%
Viera West, FL8,6803530%
Cape Canaveral, FL10,1163530%
Cocoa West, FL5,1153530%
Port St. John, FL11,2233628%

Cities with similar population

City, StatePopulationAir Quality IndexNational Avg.
Scottdale, GA11,221524%
Maltby, WA11,221492%
Sedro-Woolley, WA11,2253138%
River Forest, IL11,2176020%
Mendota Heights, MN11,2314412%
Port St. John, FL11,2233628%
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.