Decatur, TN Weather - Forecast & Monthly Averages

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TEMPERATURE
HUMIDITY
PRESSURE
WIND COND.

Weather Quick Facts

The highest monthly average temperature in Decatur for July is 74.6 degrees
The lowest monthly average temperature in Decatur for January is 36.3 degrees
The most monthly precipitation in Decatur occurs in July with 6.8 inches
The air quality index in Decatur is 29% better than the national average
The pollution index in Decatur is 166% worse than the national average

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Decatur 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	28°F	46°F	36°F	4.7"
February	31°F	50°F	40°F	4.6"
March	39°F	60°F	49°F	5.7"
April	48°F	71°F	59°F	5.8"
May	55°F	76°F	65°F	4.4"
June	62°F	82°F	72°F	5.0"
July	66°F	84°F	75°F	6.8"
August	65°F	84°F	74°F	3.8"
September	58°F	79°F	68°F	4.1"
October	47°F	70°F	58°F	3.6"
November	38°F	59°F	48°F	4.8"
December	33°F	50°F	41°F	6.4"

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Decatur 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	Decatur	Tennessee	National
Air quality index	30	76	42
Pollution index	7,263,220	2,454,916	2,726,193

Decatur air quality

Measurement	Total
Days measured	357
Days with good air quality	316
Days with moderate air quality	41
Days w/ poor A.Q. for sensitive groups	0
Days with unhealthy air quality	0

Air quality details

Pollutant	Total
Arsenic	0.240%
Benzene	0.020%
Carbon Tetrachloride	0.003%
Lead	0.080%
Mercury	0.300%

Average monthly Decatur temperature with heat index

Decatur monthly precipitation with daily maximum

Decatur monthly snow depth with daily maximum

Decatur monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Dayton, TN	7,510	1	98.0%
Riceville, TN	786	30	40.0%
Athens, TN	14,414	30	40.0%
Spring City, TN	2,316	30	40.0%
Etowah, TN	3,600	30	40.0%
Decatur, TN	1,667	30	40.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Lookout Mountain, GA	1,667	46	8.0%
Port Gibson, MS	1,667	44	12.0%
Crump, TN	1,667	27	46.0%
South Bend, WA	1,667	20	60.0%
Port Barre, LA	1,666	41	18.0%
Decatur, TN	1,667	30	40.0%

Source: The Decatur, 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.