September weather forecast
Alton Park, TN

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Weather in September

September, the first month of the autumn in Alton Park, is still a warm month, with an average temperature ranging between max 81.9°F (27.7°C) and min 61.2°F (16.2°C).

Temperature

The move into September indicates a slight reduction in the average high-temperature, down from August's tropical 87.3°F (30.7°C) to a warm 81.9°F (27.7°C). Alton Park observes an average nighttime temperature of 61.2°F (16.2°C) during September.

Heat index

For September, the heat index is computed to be a tropical 87.8°F (31°C). If one remains active during constant exposure, it might cause exhaustion and heat cramps.
Be informed that the heat index values are oriented around shady conditions and gentle breezes. Facing direct sunlight may hike up the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a value derived by merging air temperature with the humidity to convey how the climate feels. A person's impression of weather can be shaped by many aspects, among them metabolic variations, pregnancy, and levels of physical activity. Being under direct sunshine can magnify the heat experience, possibly pushing up the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Kids frequently fail to realize the necessity for resting and hydrating. Thirst is an advanced indication of dehydration - hence, maintaining hydration, especially during extended physical activities, becomes essential.

Humidity

The average relative humidity in September is 76%.

Rainfall

The month with the least rainfall in Alton Park is September, when the rain falls for 12.5 days and typically collects 2.56" (65mm) of precipitation.

Snowfall

In Alton Park, snow does not fall in May through October.

Daylight

In September, the average length of the day is 12h and 23min.
On the first day of September, sunrise is at 7:14 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:26 pm EDT.

Sunshine

In September, the average sunshine is 8.3h.

UV index

In Alton Park, 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 the ordinary person.
Note: The maximum UV index of 5 during September leads to these instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Updated: Aug 27, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

The high-temperature, in September, in Alton Park, records 81.9°F (27.7°C), while the low-temperature is 61.2°F (16.2°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which calculates the temperature value influenced by the moisture in the air, in September is computed to be 87.8°F (31°C).

What is the average humidity in September?

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

What is the driest month?

September is the month with the least rainfall. Rain falls for 12.5 days and accumulates 2.56" (65mm) of precipitation.

How much does it rain in September?

In Alton Park, in September, it is raining for 12.5 days, with typically 2.56" (65mm) of accumulated precipitation.

When it does not snow?

In Alton Park, snow does not fall in May through October.

What is the average length of the day in September?

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

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:14 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:26 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.3h.

What is the UV index reading in September?

In Alton Park, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk 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
Alton Park, TN

Average temperature in September - Alton Park, TN
  • Average high temperature in September: 81.9°F

The warmest month (with the highest average high temperature) is July (88°F).
The month with the lowest average high temperature is January (46°F).

  • Average low temperature in September: 61.2°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).

Average pressure in September
Alton Park, TN

Average pressure in September - Alton Park, 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 (29.98"Hg).

Average wind speed in September
Alton Park, TN

Average wind speed in September - Alton Park, TN
  • Average wind speed in September: 4.1mph

The windiest month (with the highest average wind speed) is February (6.4mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).

Average humidity in September
Alton Park, TN

Average humidity in September - Alton Park, 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, July, August, October and November (75%).

Average rainfall in September
Alton Park, TN

Average rainfall in September - Alton Park, TN
  • Average rainfall in September: 2.56"

The wettest month (with the highest rainfall) is December (4.37").
The driest month (with the least rainfall) is September (2.56").

Average rainfall days in September
Alton Park, TN

Average rainfall days in September - Alton Park, TN
  • Average rainfall days in September: 12.5 days

The month with the highest number of rainy days is July (19.6 days).
The month with the least rainy days is November (9.8 days).

Average snowfall in September
Alton Park, TN

Average snowfall in September - Alton Park, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Alton Park, TN

Average snowfall days in September - Alton Park, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.1 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Alton Park, TN

Average daylight in September / Average sunshine in September - Alton Park, 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 18min).
The month with the least sunshine is December (Average sunshine: 4h and 54min).

Average sunshine days in September
Alton Park, TN

Average sunshine days in September - Alton Park, TN
  • Average sunshine days in September: 15.9 days

The month with the most sunshine days is October (18.9 days).
The month with the least sunshine days is July (9.4 days).

Average UV index in September
Alton Park, TN

Average UV index in September - Alton Park, 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
Alton Park, TN

Average cloud cover in September - Alton Park, TN
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is June (Cloud cover 31).

Average visibility in September
Alton Park, TN

Average visibility in September - Alton Park, TN
  • Average visibility in September: 5mi

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

Alton Park, Tennessee, USA

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