September weather forecast
Donnell Chapel, TN

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Weather in September

The first month of the autumn, September, is still a warm month in Donnell Chapel, Tennessee, with temperature in the range of an average high of 81°F (27.2°C) and an average low of 61°F (16.1°C).

Temperature

The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a hot 86.4°F (30.2°C) in August to a moderately hot 81°F (27.2°C). During the September nights, an average temperature of 61°F (16.1°C) is observed.

Heat index

For most parts of September, the heat index is appraised at a tropical 86°F (30°C). Long-standing exposure and activity could induce a feeling of tiredness and lead to heat cramps.
In reference to the heat index, it's for places in shade and with a slight wind. Heat index values may be hiked up by 15 Fahrenheit (8 Celsius) degrees under direct sunshine.
Note: The heat index, also known as 'feels like' or 'real feel', is found by incorporating humidity levels into the air temperature measurement. The impact of weather is individual, with diverse individuals experiencing it differently due to variations in body mass, height, and activity levels. Always consider that direct sunlight exposure might heighten the heat's effects, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.

Humidity

In September, the average relative humidity is 76%.

Rainfall

The month with the least rainfall is September, when the rain falls for 13.9 days and typically collects 2.28" (58mm) of precipitation.

Snowfall

In Donnell Chapel, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of September, sunrise is at 6:17 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:29 pm CDT.

Sunshine

In September, the average sunshine is 8.5h.

UV index

In Donnell Chapel, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.
Note: The daily maximum UV index of 5 in September interprets into the following advice:
Undertake precautions - It is suggested to shield oneself from sunburn. It's recommended to limit sun exposure when its radiation is at its peak during midday. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The average high-temperature, in September, in Donnell Chapel, is 81°F (27.2°C), while the average low-temperature is 61°F (16.1°C). The average heat index (a.k.a. 'feels like', 'real feel'), which represents the influence of relative humidity on air temperature, in September is appraised at 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 76%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 13.9 days and accumulates 2.28" (58mm) of precipitation.

How many days does it rain in September in Donnell Chapel?

In Donnell Chapel, in September, during 13.9 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

When it does not snow?

May through October are months without snowfall in Donnell Chapel.

How many hours of daylight does Donnell Chapel have in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:17 am and sunset at 7:11 pm. On the last day of the month, sunrise is at 6:39 am and sunset at 6:29 pm CDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.5h.

What is the UV index reading in September in Donnell Chapel?

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium hazard to health 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
Donnell Chapel, TN

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

The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (44.8°F).

  • Average low temperature in September: 61°F

The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).

Average pressure in September
Donnell Chapel, TN

Average pressure in September - Donnell Chapel, TN
  • Average pressure in September: 30.03"Hg

The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).

Average wind speed in September
Donnell Chapel, TN

Average wind speed in September - Donnell Chapel, TN
  • Average wind speed in September: 4.6mph

The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).

Average humidity in September
Donnell Chapel, TN

Average humidity in September - Donnell Chapel, TN
  • Average humidity in September: 76%

The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are October and November (75%).

Average rainfall in September
Donnell Chapel, TN

Average rainfall in September - Donnell Chapel, TN
  • Average rainfall in September: 2.28"

The wettest months (with the highest rainfall) are February and July (4.45").
The driest month (with the least rainfall) is September (2.28").

Average rainfall days in September
Donnell Chapel, TN

Average rainfall days in September - Donnell Chapel, TN
  • Average rainfall days in September: 13.9 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (9.6 days).

Average snowfall in September
Donnell Chapel, TN

Average snowfall in September - Donnell Chapel, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is January (1.14").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Donnell Chapel, TN

Average snowfall days in September - Donnell Chapel, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.2 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
Donnell Chapel, TN

Average daylight in September / Average sunshine in September - Donnell Chapel, 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 3min

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 24min).

Average sunshine days in September
Donnell Chapel, TN

Average sunshine days in September - Donnell Chapel, TN
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in September
Donnell Chapel, TN

Average UV index in September - Donnell Chapel, 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
Donnell Chapel, TN

Average cloud cover in September - Donnell Chapel, TN
  • Average cloud cover in September: 32

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September
Donnell Chapel, TN

Average visibility in September - Donnell Chapel, TN
  • Average visibility in September: 6mi

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

Donnell Chapel, Tennessee, USA

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