September weather forecast
Deason, TN

Share

Weather in September

September, the first month of the autumn in Deason, is still a warm month, with an average temperature varying between 61.9°F (16.6°C) and 81.1°F (27.3°C).

Temperature

The onset of September entails a subtle temperature shift, as the average high-temperature eases from a tropical 86.5°F (30.3°C) in August to a warm 81.1°F (27.3°C). Deason observes an average nighttime low-temperature of 61.9°F (16.6°C) during the month of September.

Heat index

Throughout September, the heat index is computed to be a tropical 86°F (30°C). Continuous exposure and activity could induce a sense of tiredness and subsequently, 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' or 'feels like', is a metric representing the sensation of warmth when air temperature and moisture come together. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.

Humidity

The average relative humidity in September is 75%.

Rainfall

The month with the least rainfall is September, when the rain falls for 13.2 days and typically collects 2.09" (53mm) of precipitation.

Snowfall

In Deason, snow does not fall in May through October.

Daylight

In Deason, Tennessee, the average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 6:18 am and sunset at 7:12 pm. On the last day of September, sunrise is at 6:40 am and sunset at 6:30 pm CDT.

Sunshine

In Deason, the average sunshine in September is 8.3h.

UV index

In Deason, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 5 during September translates into the following guidance:
Take necessary precautions - Protection from skin and eye injury is mandatory. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit.
Updated: Aug 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Deason in September?

September temperatures vary between a high-temperature of 81.1°F (27.3°C) and a low-temperature of 61.9°F (16.6°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 75%.

What is the driest month?

September is the month with the least rainfall in Deason, Tennessee. Rain falls for 13.2 days and accumulates 2.09" (53mm) of precipitation.

How much does it rain in September?

In September, in Deason, Tennessee, the rain falls for 13.2 days. Throughout September, 2.09" (53mm) of precipitation is accumulated.

When it does not snow?

In Deason, snow does not fall in May through October.

How many hours of daylight does Deason have in September?

The average day length in September is 12h and 23min.

What time are sunrise and sunset in September in Deason?

On the first day of September in Deason, sunrise is at 6:18 am and sunset at 7:12 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:30 pm CDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.3h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from exposure to the Sun's 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
Deason, TN

Average temperature in September - Deason, TN
  • Average high temperature in September: 81.1°F

The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (45.5°F).

  • Average low temperature in September: 61.9°F

The month with the highest average low temperature is July (67.8°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

Average pressure in September
Deason, TN

Average pressure in September - Deason, 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
Deason, TN

Average wind speed in September - Deason, TN
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is July (4.7mph).

Average humidity in September
Deason, TN

Average humidity in September - Deason, TN
  • Average humidity in September: 75%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (74%).

Average rainfall in September
Deason, TN

Average rainfall in September - Deason, TN
  • Average rainfall in September: 2.09"

The wettest month (with the highest rainfall) is February (4.33").
The driest month (with the least rainfall) is September (2.09").

Average rainfall days in September
Deason, TN

Average rainfall days in September - Deason, TN
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is July (19.5 days).
The month with the least rainy days is November (8.9 days).

Average snowfall in September
Deason, TN

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

The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Deason, TN

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

The month with the highest number of snowfall days is January (3.1 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
Deason, TN

Average daylight in September / Average sunshine in September - Deason, 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 2min

The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 18min).

Average sunshine days in September
Deason, TN

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

The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is July (10.1 days).

Average UV index in September
Deason, TN

Average UV index in September - Deason, 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 and December (UV index 2).

Average cloud cover in September
Deason, TN

Average cloud cover in September - Deason, TN
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 31).

Average visibility in September
Deason, TN

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

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

Deason, Tennessee, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location