September weather forecast
New Union, TN

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Weather in September

September, the first month of the autumn in New Union, is still a warm month, with an average temperature fluctuating between 80.6°F (27°C) and 61°F (16.1°C).

Temperature

New Union experiences an average high-temperature of a still moderately hot 80.6°F (27°C) in September, marking an insignificant shift from 85.6°F (29.8°C) in August. In New Union, an average temperature of 61°F (16.1°C) is noted during September nights.

Heat index

For most parts of September, the heat index is appraised at 84.2°F (29°C). Unrelenting activity during exposure could cause fatigue and potentially lead to heat cramps.
Research indicates the heat index considers values in shaded locales and with light winds. Uninterrupted exposure to the sun may boost the heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. One's perception of temperature can vary depending on physical activity and individual heat sensitivity, influenced by factors like wind, attire, and metabolic variations. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.

Humidity

The average relative humidity in September is 76%.

Rainfall

September is the month with the least rainfall. Rain falls for 14.1 days and accumulates 2.28" (58mm) of precipitation.

Snowfall

In New Union, Tennessee, snow does not fall in May through October.

Daylight

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

Sunshine

In New Union, the average sunshine in September is 8.3h.

UV index

In New Union, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: A daily high UV index of 5 in September leads to these guidelines:
Be vigilant - Preventing sunburn is recommended. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Updated: Aug 10, 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 New Union, records 80.6°F (27°C), while the low-temperature is 61°F (16.1°C). The average heat index (a.k.a. 'apparent temperature', 'real feel'), which takes the relative humidity and factors it into the air temperature reading, in September is appraised at 84.2°F (29°C).

What is the average humidity in September?

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

What is the driest month?

The month with the least rainfall is September, when the rain falls for 14.1 days and typically collects 2.28" (58mm) of precipitation.

How many days does it rain in September?

In September, the rain falls for 14.1 days. Throughout September, 2.28" (58mm) of precipitation is accumulated.

When it does not snow?

In New Union, snow does not fall in May through October.

How many hours of daylight does New Union have in September?

In New Union, 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 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 many hours of sunshine does New Union have in September?

The average sunshine duration in September is 8.3h.

What is the UV index reading in September?

In New Union, the average daily maximum UV index in September is 5. A UV Index 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
New Union, TN

Average temperature in September - New Union, TN
  • Average high temperature in September: 80.6°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (45.1°F).

  • Average low temperature in September: 61°F

The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (30.7°F).

Average pressure in September
New Union, TN

Average pressure in September - New Union, 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
New Union, TN

Average wind speed in September - New Union, TN
  • Average wind speed in September: 5mph

The windiest month (with the highest average wind speed) is February (8.1mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).

Average humidity in September
New Union, TN

Average humidity in September - New Union, TN
  • Average humidity in September: 76%

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

Average rainfall in September
New Union, TN

Average rainfall in September - New Union, TN
  • Average rainfall in September: 2.28"

The wettest month (with the highest rainfall) is July (4.72").
The driest month (with the least rainfall) is September (2.28").

Average rainfall days in September
New Union, TN

Average rainfall days in September - New Union, TN
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is July (21 days).
The month with the least rainy days is November (10.3 days).

Average snowfall in September
New Union, TN

Average snowfall in September - New Union, TN
  • Average snowfall in September: 0"

The month with the highest snowfall is February (1.34").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
New Union, TN

Average snowfall days in September - New Union, TN
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.2 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
New Union, TN

Average daylight in September / Average sunshine in September - New Union, 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 February (Average sunshine: 4h and 24min).

Average sunshine days in September
New Union, TN

Average sunshine days in September - New Union, TN
  • Average sunshine days in September: 14.1 days

The month with the most sunshine days is October (17.8 days).
The month with the least sunshine days is July (8.1 days).

Average UV index in September
New Union, TN

Average UV index in September - New Union, 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
New Union, TN

Average cloud cover in September - New Union, TN
  • Average cloud cover in September: 33

The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is June (Cloud cover 31).

Average visibility in September
New Union, TN

Average visibility in September - New Union, TN
  • Average visibility in September: 6mi

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

New Union, Tennessee, USA

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