September weather forecast
Lamontville, TN

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Weather in September

The first month of the autumn, September, is still a warm month in Lamontville, Tennessee, with an average temperature fluctuating between 81°F (27.2°C) and 59.9°F (15.5°C).

Temperature

A minor decrease in the average high-temperature is observed during September, shifting from a tropical 86.9°F (30.5°C) in August to a moderately hot 81°F (27.2°C). Lamontville records an average low-temperature of 59.9°F (15.5°C) throughout the month of September.

Heat index

The heat index in September is evaluated at a hot 86°F (30°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.
Heat index determinations are made taking into account the shade and light air movements. In the presence of direct sunshine, the heat index could be augmented by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.

Humidity

In September, the average relative humidity is 76%.

Rainfall

September is the month with the least rainfall. Rain falls for 11.7 days and accumulates 2.32" (59mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 7:12 am and sunset at 8:05 pm. On the last day of September, sunrise is at 7:33 am and sunset at 7:24 pm EDT.

Sunshine

In Lamontville, the average sunshine in September is 8.5h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 5 during September translates into the following guidance:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Lamontville in September?

In September, in Lamontville, the average high-temperature is 81°F (27.2°C), and the average low-temperature is 59.9°F (15.5°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in September is evaluated at 86°F (30°C).

What is the average humidity in September?

In Lamontville, the average relative humidity in September is 76%.

What is the driest month?

September is the month with the least rainfall in Lamontville. Rain falls for 11.7 days and accumulates 2.32" (59mm) of precipitation.

How many days does it rain in September?

In Lamontville, in September, during 11.7 rainfall days, 2.32" (59mm) of precipitation is typically accumulated.

When it does not snow?

May through October are months without snowfall in Lamontville, Tennessee.

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

On the first day of September, sunrise is at 7:12 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:24 pm EDT.

How many hours of sunshine does Lamontville have in September?

In Lamontville, the average sunshine duration in September is 8.5h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Lamontville, TN

Average temperature in September - Lamontville, TN
  • Average high temperature in September: 81°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 (45.5°F).

  • Average low temperature in September: 59.9°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 (30.6°F).

Average pressure in September
Lamontville, TN

Average pressure in September - Lamontville, TN
  • Average pressure in September: 30.03"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).

Average wind speed in September
Lamontville, TN

Average wind speed in September - Lamontville, TN
  • Average wind speed in September: 4.2mph

The windiest months (with the highest average wind speed) are February, March and April (6.5mph).
The calmest months (with the lowest average wind speed) are July and August (3.9mph).

Average humidity in September
Lamontville, TN

Average humidity in September - Lamontville, TN
  • Average humidity in September: 76%

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

Average rainfall in September
Lamontville, TN

Average rainfall in September - Lamontville, TN
  • Average rainfall in September: 2.32"

The wettest months (with the highest rainfall) are July and December (4.29").
The driest month (with the least rainfall) is September (2.32").

Average rainfall days in September
Lamontville, TN

Average rainfall days in September - Lamontville, TN
  • Average rainfall days in September: 11.7 days

The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is November (9.5 days).

Average snowfall in September
Lamontville, TN

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

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

Average snowfall days in September
Lamontville, TN

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

The month with the highest number of snowfall days is January (4.8 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
Lamontville, TN

Average daylight in September / Average sunshine in September - Lamontville, 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 months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).

Average sunshine days in September
Lamontville, TN

Average sunshine days in September - Lamontville, TN
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is July (10.2 days).

Average UV index in September
Lamontville, TN

Average UV index in September - Lamontville, 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
Lamontville, TN

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

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September
Lamontville, TN

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

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

Lamontville, Tennessee, USA

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