Portland, TN Weather - Forecast & Monthly Averages

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TEMPERATURE	66
HUMIDITY	64
PRESSURE	101794.84
WIND COND.	20 9.3

Weather Quick Facts

The highest monthly average temperature in Portland for July is 79 degrees
The lowest monthly average temperature in Portland for January is 37.3 degrees
The most monthly precipitation in Portland occurs in April with 5.8 inches
The air quality index in Portland is 2% worse than the national average
The pollution index in Portland is 35% better than the national average

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Portland 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	29°F	47°F	37°F	4.0"
February	30°F	50°F	39°F	3.7"
March	39°F	62°F	50°F	4.2"
April	49°F	73°F	60°F	5.8"
May	57°F	79°F	68°F	5.7"
June	66°F	88°F	77°F	4.1"
July	69°F	90°F	79°F	5.7"
August	68°F	90°F	78°F	4.7"
September	60°F	83°F	71°F	4.4"
October	48°F	72°F	59°F	3.9"
November	38°F	61°F	49°F	3.5"
December	32°F	51°F	41°F	4.7"

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Portland 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	Portland	Tennessee	National
Air quality index	43	76	42
Pollution index	1,764,100	2,454,916	2,726,193

Portland air quality

Measurement	Total
Days measured	365
Days with good air quality	268
Days with moderate air quality	97
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.001%
Benzene	0.030%
Carbon Tetrachloride	0.004%
Lead	0.030%
Mercury	0.010%

Average monthly Portland temperature with heat index

Portland monthly precipitation with daily maximum

Portland monthly snow depth with daily maximum

Portland monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Mitchellville, TN	166	43	14.0%
Franklin, KY	9,114	43	14.0%
Fairfield, TN	204	43	14.0%
Bransford, TN	276	43	14.0%
Castalian Springs, TN	405	45	10.0%
Portland, TN	13,381	43	14.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
New Kingman-Butler, AZ	13,385	13	74.0%
Connersville, IN	13,374	6	88.0%
Lumberton, TX	13,374	45	10.0%
Sharon, PA	13,388	42	16.0%
Trenton, OH	13,371	54	8.0%
Portland, TN	13,381	43	14.0%

Source: The Portland, TN 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.