September weather forecast
Clinton, TN

Weather in September

September, the first month of the autumn in Clinton, is also a moderately hot month, with temperature in the range of an average low of 59.5°F (15.3°C) and an average high of 81°F (27.2°C).

Temperature

In September, the average high-temperature marginally drops from a tropical 87.3°F (30.7°C) in August to a warm 81°F (27.2°C). In Clinton, Tennessee, in September, the average low-temperature is 59.5°F (15.3°C).

Heat index

In September, the average heat index is calculated to be a tropical 86°F (30°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 'felt air temperature', 'apparent temperature', 'feels like', or 'real feel', 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 (wind, clothing, differences in body mass, height, and shape). 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 particularly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.

Humidity

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

Rainfall

September is the month with the least rainfall in Clinton. Rain falls for 12.7 days and accumulates 1.97" (50mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In September, the average length of the day in Clinton is 12h and 24min.
On the first day of the month, sunrise is at 7:08 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:21 pm EDT.

Sunshine

In Clinton, the average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the temperature in September in Clinton?

The average high-temperature, in September, in Clinton, is 81°F (27.2°C), while the average low-temperature is 59.5°F (15.3°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in September is calculated to be 86°F (30°C).

What is the average humidity in September in Clinton?

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

What is the driest month in Clinton?

September is the month with the least rainfall in Clinton, Tennessee. Rain falls for 12.7 days and accumulates 1.97" (50mm) of precipitation.

How much does it rain in Clinton in September?

In Clinton, Tennessee, in September, during 12.7 rainfall days, 1.97" (50mm) of precipitation is typically accumulated.

When it does not snow in Clinton?

In Clinton, Tennessee, snow does not fall in May through September.

Does it snow in Clinton in September?

In Clinton, Tennessee, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Clinton have in September?

The average day length in September is 12h and 24min.

When is the sunrise / sunset in September in Clinton?

In September, on the first day of the month, sunrise is at 7:08 am and sunset at 8:04 pm. On the last day of the month, in Clinton, Tennessee, sunrise is at 7:30 am and sunset at 7:21 pm EDT.

How long on average sun shines in September in Clinton?

In Clinton, the average sunshine duration in September is 8.6h.

How high is the UV index in September in Clinton?

In Clinton, Tennessee, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
Average max. wind speed
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
Clinton, TN

Average temperature in September - Clinton, TN
  • Average high temperature in September: 81°F

The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (43.9°F).

  • Average low temperature in September: 59.5°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 (29.3°F).

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Average pressure in September
Clinton, TN

Average pressure in September - Clinton, 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).

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Average wind speed in September
Clinton, TN

Average wind speed in September - Clinton, TN
  • Average wind speed in September: 3.8mph

The windiest month (with the highest average wind speed) is April (6mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).

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Average humidity in September
Clinton, TN

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

The months with the highest relative humidity are February and December (79%).
The months with the lowest relative humidity are July and August (73%).

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Average rainfall in September
Clinton, TN

Average rainfall in September - Clinton, TN
  • Average rainfall in September: 1.97"

The wettest month (with the highest rainfall) is February (4.53").
The driest month (with the least rainfall) is September (1.97").

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Average rainfall days in September
Clinton, TN

Average rainfall days in September - Clinton, TN
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (10.3 days).

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Average snowfall in September
Clinton, TN

Average snowfall in September - Clinton, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (2.05").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Clinton, TN

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

The month with the highest number of snowfall days is January (6.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Clinton, TN
  • Average daylight in September: 12h and 24min

The month with the longest days is June (Average daylight: 14h and 35min).
The month with the shortest days is December (Average daylight: 9h and 45min).

  • Average sunshine in September: 8h and 36min

The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 4h and 54min).

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Average sunshine days in September
Clinton, TN

Average sunshine days in September - Clinton, TN
  • Average sunshine days in September: 16 days

The month with the most sunshine days is November (17.7 days).
The months with the least sunshine days are February and July (10.2 days).

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Average UV index in September
Clinton, TN

Average UV index in September - Clinton, 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).

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Average cloud cover in September
Clinton, TN

Average cloud cover in September - Clinton, TN
  • Average cloud cover in September: 31

The month with the most cloud cover is February (Cloud cover 53).
The months with the least cloud cover are June and August (Cloud cover 29).

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Average visibility in September
Clinton, TN

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

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

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