Port St. John, FL Weather - Forecast & Monthly Averages

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TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.

Weather Quick Facts

The highest monthly average temperature in Port St. John for August is 82.4 degrees
The lowest monthly average temperature in Port St. John for February is 60.8 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 7% better than the national average
The pollution index in Port St. John is 513% worse than the national average

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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.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	55°F	71°F	63°F	4.8"
February	52°F	70°F	61°F	4.2"
March	57°F	74°F	65°F	6.2"
April	60°F	77°F	68°F	5.0"
May	66°F	81°F	74°F	6.6"
June	72°F	86°F	79°F	9.1"
July	75°F	89°F	81°F	9.2"
August	75°F	90°F	82°F	5.0"
September	74°F	86°F	79°F	13.1"
October	70°F	81°F	75°F	16.9"
November	60°F	75°F	67°F	2.2"
December	55°F	71°F	62°F	4.6"

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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.
Index	Port St. John	Florida	National
Air quality index	39	35	42
Pollution index	16,722,700	7,570,785	2,726,193

Port St. John air quality

Measurement	Total
Days measured	365
Days with good air quality	296
Days with moderate air quality	63
Days w/ poor A.Q. for sensitive groups	6
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.050%
Benzene	0.210%
Carbon Tetrachloride	0.030%
Lead	0.190%
Mercury	0.010%

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	Population	Air Quality Index	National Avg.
Cape Canaveral, FL	10,411	36	28.0%
Merritt Island, FL	33,975	36	28.0%
Viera West, FL	14,204	36	28.0%
Cocoa, FL	20,151	36	28.0%
Rockledge, FL	27,739	36	28.0%
Port St. John, FL	23,940	39	22.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Ponca City, OK	23,940	40	20.0%
Kalispell, MT	23,935	37	26.0%
Freeport, IL	23,930	42	16.0%
South Plainfield, NJ	23,961	51	2.0%
Saint-Lin--Laurentides, QC	23,910	n/a
Port St. John, FL	23,940	39	22.0%

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.