September weather forecast
Barton Mill, TN

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Weather in September

September, the first month of the autumn in Barton Mill, is also a moderately hot month, with temperature in the range of an average high of 81.3°F (27.4°C) and an average low of 59.9°F (15.5°C).

Temperature

During the shift to September, a minor reduction in average high-temperature is observed, shifting from a tropical 86.9°F (30.5°C) in August to a moderately hot 81.3°F (27.4°C). Barton Mill experiences a consistent average temperature of 59.9°F (15.5°C) throughout the nights in September.

Heat index

For September, the heat index is evaluated at a hot 86°F (30°C). Persisting in activity during long-term exposure might induce weariness, with subsequent heat cramps.
For clarity, heat index numbers account for light winds and areas under shade. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', integrates the air's temperature and its humidity to showcase the felt temperature by people. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Awareness is key; direct sunlight can enhance the weather's impact, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are primarily vital for children. Kids are usually more vulnerable than adults, given their lesser sweating ability. Along with their larger skin surface relative to their small stature and the excess heat due to their activity, their risk is amplified.

Humidity

The months with the lowest humidity in Barton Mill are June through November, with an average relative humidity of 75%.

Rainfall

September is the month with the least rainfall. Rain falls for 8.7 days and accumulates 0.79" (20mm) of precipitation.

Snowfall

In Barton Mill, snow does not fall in April through October.

Daylight

In September, the average length of the day in Barton Mill is 12h and 23min.
On the first day of the month, sunrise is at 7:11 am and sunset at 8:05 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:23 pm EDT.

Sunshine

The average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index in Barton Mill is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: In September, the maximum UV index of 5 translates into these guidelines:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Updated: Jul 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures in Barton Mill?

In Barton Mill, 81.3°F (27.4°C) is the average high-temperature and 59.9°F (15.5°C) is the average low-temperature during September. The average heat index (a.k.a. 'apparent temperature', 'real feel'), which combines air temperature and relative humidity, in September is evaluated at 86°F (30°C).

What is the least humid month?

The months with the lowest humidity are June through November, with an average relative humidity of 75%.

What is the average humidity in September?

In Barton Mill, the average relative humidity in September is 75%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 8.7 days and typically collects 0.79" (20mm) of precipitation.

How much does it rain in September?

In Barton Mill, during September, the rain falls for 8.7 days and regularly aggregates up to 0.79" (20mm) of precipitation.

When it does not snow?

April through October are months without snowfall.

What is the average length of the day in September?

The average day length in September is 12h and 23min.

When are sunrise and sunset in September?

On the first day of September, sunrise is at 7:11 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:23 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.6h.

How high is the UV index in September?

In Barton Mill, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Barton Mill, TN

Average temperature in September - Barton Mill, TN
  • Average high temperature in September: 81.3°F

The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (46°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

Average pressure in September
Barton Mill, TN

Average pressure in September - Barton Mill, TN
  • Average pressure in September: 30.03"Hg

The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).

Average wind speed in September
Barton Mill, TN

Average wind speed in September - Barton Mill, TN
  • Average wind speed in September: 4.3mph

The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4mph).

Average humidity in September
Barton Mill, TN

Average humidity in September - Barton Mill, TN
  • Average humidity in September: 75%

The month with the highest relative humidity is December (79%).
The months with the lowest relative humidity are June, July, August, September, October and November (75%).

Average rainfall in September
Barton Mill, TN

Average rainfall in September - Barton Mill, TN
  • Average rainfall in September: 0.79"

The wettest month (with the highest rainfall) is July (2.09").
The driest month (with the least rainfall) is September (0.79").

Average rainfall days in September
Barton Mill, TN

Average rainfall days in September - Barton Mill, TN
  • Average rainfall days in September: 8.7 days

The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (6.7 days).

Average snowfall in September
Barton Mill, TN

Average snowfall in September - Barton Mill, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Barton Mill, TN

Average snowfall days in September - Barton Mill, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Barton Mill, TN

Average daylight in September / Average sunshine in September - Barton Mill, TN
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 5h and 6min).

Average sunshine days in September
Barton Mill, TN

Average sunshine days in September - Barton Mill, TN
  • Average sunshine days in September: 19.6 days

The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is July (15.3 days).

Average UV index in September
Barton Mill, TN

Average UV index in September - Barton Mill, TN
  • Average UV index in September: 5

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).

Average cloud cover in September
Barton Mill, TN

Average cloud cover in September - Barton Mill, TN
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).

Average visibility in September
Barton Mill, TN

Average visibility in September - Barton Mill, TN
  • Average visibility in September: 6mi

The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).

Barton Mill, Tennessee, USA

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