September weather forecast
Lenoir City, TN

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Weather in September

September indicates the transition from summer to autumn in Lenoir City, Tennessee. Sliding down the temperature scale, the city starts to cool down, signaling the end to summer heat. An appreciable drop of rainfall to 0.47" (12mm) becomes a notable feature of this month. A delightful mix of summery warmth and autumn's fresh coolness paints September. This gradual shift from hot to cooler days makes it an opportunist time for outdoor enjoyment.

Temperature

September in Lenoir City is characterized by a slight reduction in average high-temperature, easing from a tropical 86.7°F (30.4°C) in August to a warm 80.8°F (27.1°C). Lenoir City registers a consistent average low-temperature of 59.5°F (15.3°C) during September.

Heat index

The heat index value during September is calculated to be 84.2°F (29°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.
Factoring in the heat index, values are geared towards shaded areas with light breezes. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an aggregate value of air's warmth and moisture to show the human-felt temperature. An individual's perception of weather can be swayed by a variety of elements including metabolic differences, pregnancy status, and their level of physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.

Humidity

In September, the average relative humidity is 75%.

Rainfall

September is the month with the least rainfall. Rain falls for 8.5 days and accumulates 0.47" (12mm) of precipitation.

Snowfall

In Lenoir City, snow does not fall in April through September.

Daylight

In September, the average length of the day is 12h and 23min.
On the first day of the month, sunrise is at 7:09 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:21 pm EDT.

Sunshine

In September, the average sunshine is 8.7h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.
Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Exercise caution. Those with pale skin may experience burns in less than half an hour. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Tightly woven clothing, when worn loosely, shields effectively against the Sun.

Frequently asked questions

What is the temperature in September?

The high-temperature, in September, in Lenoir City, is 80.8°F (27.1°C), while the low-temperature averages to 59.5°F (15.3°C). The average heat index (a.k.a. 'real feel', 'feels like'), which combines relative humidity and air temperature, in September is calculated to be 84.2°F (29°C).

What is the average humidity in September?

In Lenoir City, the average relative humidity in September is 75%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 8.5 days and accumulates 0.47" (12mm) of precipitation.

How many days does it rain in September?

In September, the rain falls for 8.5 days. Throughout September, 0.47" (12mm) of precipitation is accumulated.

When it does not snow?

April through September are months without snowfall.

Does it snow in September?

In Lenoir City, in September, it doesn't snow. In October, it regularly snows.

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?

In September, on the first day of the month, sunrise is at 7:09 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:31 am and sunset at 7:21 pm EDT.

How many hours of sunshine does Lenoir City have in September?

In Lenoir City, the average sunshine duration in September is 8.7h.

What is the UV index intensity in September?

In Lenoir City, Tennessee, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to 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
Lenoir City, TN

Average temperature in September - Lenoir City, TN
  • Average high temperature in September: 80.8°F

The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (44.8°F).

  • Average low temperature in September: 59.5°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (30°F).

Average pressure in September
Lenoir City, TN

Average pressure in September - Lenoir City, TN
  • Average pressure in September: 30.04"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
Lenoir City, TN

Average wind speed in September - Lenoir City, TN
  • Average wind speed in September: 3.9mph

The windiest month (with the highest average wind speed) is April (6.1mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).

Average humidity in September
Lenoir City, TN

Average humidity in September - Lenoir City, TN
  • Average humidity in September: 75%

The months with the highest relative humidity are February and December (79%).
The months with the lowest relative humidity are July and August (74%).

Average rainfall in September
Lenoir City, TN

Average rainfall in September - Lenoir City, TN
  • Average rainfall in September: 0.47"

The wettest month (with the highest rainfall) is February (1.3").
The driest month (with the least rainfall) is September (0.47").

Average rainfall days in September
Lenoir City, TN

Average rainfall days in September - Lenoir City, TN
  • Average rainfall days in September: 8.5 days

The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is November (7.5 days).

Average snowfall in September
Lenoir City, TN

Average snowfall in September - Lenoir City, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.51").
The months with the least snowfall are April, May, June, July, August and September (0").

Average snowfall days in September
Lenoir City, TN

Average snowfall days in September - Lenoir City, TN
  • Average snowfall days in September: 0 days

The months with the highest number of snowfall days are January and February (3.7 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
Lenoir City, TN

Average daylight in September / Average sunshine in September - Lenoir City, 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 42min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

Average sunshine days in September
Lenoir City, TN

Average sunshine days in September - Lenoir City, TN
  • Average sunshine days in September: 19.3 days

The month with the most sunshine days is October (21.5 days).
The months with the least sunshine days are February and July (15.9 days).

Average UV index in September
Lenoir City, TN

Average UV index in September - Lenoir City, 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
Lenoir City, TN

Average cloud cover in September - Lenoir City, TN
  • Average cloud cover in September: 29

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

Average visibility in September
Lenoir City, TN

Average visibility in September - Lenoir City, 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).

Lenoir City, Tennessee, USA

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