September weather forecast
Swift, TN

Weather in September

The first month of the autumn, September, is still a warm month in Swift, Tennessee, with an average temperature varying between 63.5°F (17.5°C) and 83.3°F (28.5°C).

Temperature

In Swift, the average high-temperature in September is almost the same as in August - a moderately hot 83.3°F (28.5°C). In September, in Swift, Tennessee, the average low-temperature is 63.5°F (17.5°C).

Heat index

In September, the average heat index is evaluated at a tropical 89.6°F (32°C). Exhaustion is likely with prolonged exposure and activity. Sustaining activity may result in heat cramps.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, metabolic differences, wind). Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.

Humidity

In September, the average relative humidity is 74%.

Rainfall

September is the month with the least rainfall in Swift. Rain falls for 13.7 days and accumulates 2.05" (52mm) of precipitation.

Snowfall

In Swift, snow does not fall in April through October.

Daylight

In Swift, the average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:25 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:38 pm CDT.

Sunshine

The average sunshine in September is 9.1h.

UV index

The average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the temperature in September in Swift?

The average high-temperature, in September, in Swift, is 83.3°F (28.5°C), while the average low-temperature is 63.5°F (17.5°C). in September, the average heat index (a.k.a. 'feels like', 'real feel'), which factors the actual air temperature with the relative humidity, is evaluated at 89.6°F (32°C).

What is the average humidity in September in Swift?

In Swift, the average relative humidity in September is 74%.

What is the driest month in Swift?

September is the month with the least rainfall in Swift, Tennessee. Rain falls for 13.7 days and accumulates 2.05" (52mm) of precipitation.

How many days does it rain in September in Swift?

In Swift, Tennessee, in September, during 13.7 rainfall days, 2.05" (52mm) of precipitation is typically accumulated.

When it does not snow in Swift?

In Swift, snow does not fall in April through October.

How many hours of daylight does Swift have in September?

In Swift, Tennessee, the average day length in September is 12h and 23min.

When are sunrise and sunset in September in Swift?

On the first day of September in Swift, sunrise is at 6:25 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:38 pm CDT.

How long on average sun shines in September in Swift?

In September, the average sunshine duration in Swift is 9.1h.

What is the UV index reading in September in Swift?

The average daily maximum UV index in September in Swift, Tennessee, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Swift, TN

Average temperature in September - Swift, TN
  • Average high temperature in September: 83.3°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (46.9°F).

  • Average low temperature in September: 63.5°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).

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Average pressure in September
Swift, TN

Average pressure in September - Swift, TN
  • Average pressure in September: 30.02"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).

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Average wind speed in September
Swift, TN

Average wind speed in September - Swift, TN
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is February (8mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).

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Average humidity in September
Swift, TN

Average humidity in September - Swift, TN
  • Average humidity in September: 74%

The months with the highest relative humidity are March and December (80%).
The month with the lowest relative humidity is October (73%).

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Average rainfall in September
Swift, TN

Average rainfall in September - Swift, TN
  • Average rainfall in September: 2.05"

The wettest month (with the highest rainfall) is February (4.41").
The driest month (with the least rainfall) is September (2.05").

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Average rainfall days in September
Swift, TN

Average rainfall days in September - Swift, TN
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (9.8 days).

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Average snowfall in September
Swift, TN

Average snowfall in September - Swift, 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").

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Average snowfall days in September
Swift, TN

Average snowfall days in September - Swift, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (2.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Swift, TN

Average daylight in September / Average sunshine in September - Swift, TN
  • Average daylight in September: 12h and 23min

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 49min).

  • Average sunshine in September: 9h and 6min

The month with the most sunshine is June (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in September
Swift, TN

Average sunshine days in September - Swift, TN
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is October (19.1 days).
The month with the least sunshine days is July (10.9 days).

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Average UV index in September
Swift, TN

Average UV index in September - Swift, TN
  • Average UV index in September: 5

The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).

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Average cloud cover in September
Swift, TN

Average cloud cover in September - Swift, TN
  • Average cloud cover in September: 29

The months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 28).

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Average visibility in September
Swift, TN

Average visibility in September - Swift, TN
  • Average visibility in September: 6mi

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

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