September weather forecast
Forest Glen, TN

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Weather in September

September, the first month of the autumn in Forest Glen, is still a warm month, with an average temperature fluctuating between 59.9°F (15.5°C) and 81.1°F (27.3°C).

Temperature

The advent of September brings a subtle shift in temperature, with the average high moving from a tropical 86.7°F (30.4°C) in August to a warm 81.1°F (27.3°C). During September, Forest Glen experiences an average low-temperature of 59.9°F (15.5°C) at night.

Heat index

For most parts of September, the heat index is computed to be a tropical 86°F (30°C). Remaining active during long-lasting exposure could cause fatigue, leading to heat cramps.
Observations indicate that the heat index values are for shady locations with light wind. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.

Humidity

The average relative humidity in September is 74%.

Rainfall

The month with the least rainfall is September, when the rain falls for 10.6 days and typically collects 0.94" (24mm) of precipitation.

Snowfall

In Forest Glen, snow does not fall in April through September.

Daylight

In Forest Glen, the average length of the day in September is 12h and 23min.
On the first day of the month, sunrise is at 7:08 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:30 am and sunset at 7:20 pm EDT.

Sunshine

In September, the average sunshine is 8.7h.

UV index

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.
Note: In September, a daily UV index of 5 turns into the following recommendations:
Exercise prevention - Warding off sunburn is urged. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Updated: Aug 28, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

The high-temperature during September is 81.1°F (27.3°C) and the low-temperature is 59.9°F (15.5°C). The average heat index (a.k.a. 'feels like', 'real feel'), which combines relative humidity and air temperature, in September is computed to be 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 74%.

What is the driest month in Forest Glen?

September is the month with the least rainfall. Rain falls for 10.6 days and accumulates 0.94" (24mm) of precipitation.

How much does it rain in September?

In September, the rain falls for 10.6 days. Throughout September, 0.94" (24mm) of precipitation is accumulated.

When it does not snow?

In Forest Glen, snow does not fall in April through September.

Does it snow in September?

In Forest Glen, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Forest Glen have in September?

In Forest Glen, 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 7:08 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:30 am and sunset at 7:20 pm EDT.

How many hours of sunshine does Forest Glen have in September?

The average sunshine duration in September is 8.7h.

How high is the UV index in September?

In September, the average daily maximum UV index 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
Forest Glen, TN

Average temperature in September - Forest Glen, TN
  • Average high temperature in September: 81.1°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 (44.8°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (29.5°F).

Average pressure in September
Forest Glen, TN

Average pressure in September - Forest Glen, 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).

Average wind speed in September
Forest Glen, TN

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

The windiest month (with the highest average wind speed) is April (5.9mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).

Average humidity in September
Forest Glen, TN

Average humidity in September - Forest Glen, TN
  • Average humidity in September: 74%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is August (72%).

Average rainfall in September
Forest Glen, TN

Average rainfall in September - Forest Glen, TN
  • Average rainfall in September: 0.94"

The wettest month (with the highest rainfall) is July (2.2").
The driest month (with the least rainfall) is September (0.94").

Average rainfall days in September
Forest Glen, TN

Average rainfall days in September - Forest Glen, TN
  • Average rainfall days in September: 10.6 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is November (8.7 days).

Average snowfall in September
Forest Glen, TN

Average snowfall in September - Forest Glen, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.98").
The months with the least snowfall are April, May, June, July, August and September (0").

Average snowfall days in September
Forest Glen, TN

Average snowfall days in September - Forest Glen, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.4 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
Forest Glen, TN

Average daylight in September / Average sunshine in September - Forest Glen, 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 4min

The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

Average sunshine days in September
Forest Glen, TN

Average sunshine days in September - Forest Glen, TN
  • Average sunshine days in September: 17.1 days

The month with the most sunshine days is November (19.3 days).
The months with the least sunshine days are February and July (12.5 days).

Average UV index in September
Forest Glen, TN

Average UV index in September - Forest Glen, 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
Forest Glen, TN

Average cloud cover in September - Forest Glen, TN
  • Average cloud cover in September: 30

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 27).

Average visibility in September
Forest Glen, TN

Average visibility in September - Forest Glen, TN
  • Average visibility in September: 6mi

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

Forest Glen, Tennessee, USA

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