September weather forecast
Idlewild, TN

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Weather in September

September, the first month of the autumn in Idlewild, is still a warm month, with an average temperature fluctuating between 63°F (17.2°C) and 82.8°F (28.2°C).

Temperature

The advent of September denotes an average high-temperature of a warm 82.8°F (28.2°C), subtly different from August's 87.3°F (30.7°C). September nights cool down to an average low-temperature of 63°F (17.2°C).

Heat index

For September, the heat index is computed to be a hot 87.8°F (31°C). With unrelenting exposure and activity, one might experience exhaustion, leading to potential heat cramps.
The metrics for the heat index are tailored for both shady environments and light winds. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. This impact is subjective, influenced by the person's physical activity and individual heat perception, affected by factors including wind, attire, and metabolic differences. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.

Humidity

The average relative humidity in September is 73%.

Rainfall

The month with the least rainfall is September, when the rain falls for 13.3 days and typically collects 1.77" (45mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:27 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:39 pm CDT.

Sunshine

In Idlewild, the average sunshine in September is 9.3h.

UV index

In Idlewild, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: In September, an average UV index of 5 transforms into the following instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Updated: Aug 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

How hot does it get in September?

In Idlewild, 82.8°F (28.2°C) is the average high-temperature and 63°F (17.2°C) is the average low-temperature during September. The average heat index (a.k.a. 'feels like', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is computed to be 87.8°F (31°C).

What is the average humidity in September?

The average relative humidity in September in Idlewild is 73%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 13.3 days and accumulates 1.77" (45mm) of precipitation.

How much does it rain in September?

In Idlewild, during September, the rain falls for 13.3 days and regularly aggregates up to 1.77" (45mm) of precipitation.

When it does not snow?

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

How many hours of daylight does Idlewild have in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:27 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:50 am and sunset at 6:39 pm CDT.

How long on average sun shines in September?

In Idlewild, the average sunshine duration in September is 9.3h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health threat from unsafe exposure to Sun's UV rays.
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
Idlewild, TN

Average temperature in September - Idlewild, TN
  • Average high temperature in September: 82.8°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 (44.6°F).

  • Average low temperature in September: 63°F

The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (31.1°F).

Average pressure in September
Idlewild, TN

Average pressure in September - Idlewild, 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 (29.95"Hg).

Average wind speed in September
Idlewild, TN

Average wind speed in September - Idlewild, TN
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is February (9mph).
The calmest month (with the lowest average wind speed) is July (5.3mph).

Average humidity in September
Idlewild, TN

Average humidity in September - Idlewild, TN
  • Average humidity in September: 73%

The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September
Idlewild, TN

Average rainfall in September - Idlewild, TN
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is February (4.13").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in September
Idlewild, TN

Average rainfall days in September - Idlewild, TN
  • Average rainfall days in September: 13.3 days

The month with the highest number of rainy days is July (16.6 days).
The month with the least rainy days is November (10 days).

Average snowfall in September
Idlewild, TN

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

The month with the highest snowfall is February (1.1").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Idlewild, TN

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

The month with the highest number of snowfall days is January (2.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in September
Idlewild, TN

Average sunshine days in September - Idlewild, TN
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is July (12.6 days).

Average UV index in September
Idlewild, TN

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

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

Average cloud cover in September
Idlewild, TN

Average cloud cover in September - Idlewild, TN
  • Average cloud cover in September: 28

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 26).

Average visibility in September
Idlewild, TN

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

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

Idlewild, Tennessee, USA

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