Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The arrival of September is marked by a minor reduction in average high-temperature, sliding from a tropical 87.4°F (30.8°C) in August to a warm 81.5°F (27.5°C). In Brentwood, the expected average low-temperature for September is an enjoyable 62.2°F (16.8°C).Heat index
The heat index in September is computed to be a hot 86°F (30°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.Heat index evaluations are typically in the context of light winds and shaded environments. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a numerical representation of warmth when taking temperature and moisture levels into account. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Under direct sun rays, the felt temperature might be heightened, with the heat index increasing by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity is 74%.Rainfall
In Brentwood, in September, it is raining for 13.6 days, with typically 2.09" (53mm) of accumulated precipitation. Throughout the year, there are 166.2 rainfall days, and 33.86" (860mm) of precipitation is accumulated.Snowfall
In Brentwood, Tennessee, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:19 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:31 pm CDT.
Sunshine
In September, the average sunshine in Brentwood is 8.5h.UV index
In Brentwood, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during September leads to these instructions:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Brentwood have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Brentwood have in September?
What is the UV index reading in September?
Average temperature in September
Brentwood, TN
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (45°F).
- Average low temperature in September: 62.2°F
The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Brentwood, 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
Brentwood, TN
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is February (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Brentwood, TN
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The months with the lowest relative humidity are June and October (73%).
Average rainfall in September
Brentwood, TN
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is July (3.94").
The driest month (with the least rainfall) is November (1.81").
Average rainfall days in September
Brentwood, TN
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in September
Brentwood, TN
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.87").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Brentwood, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.2 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
Brentwood, TN
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 8h and 3min
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 30min).
Average sunshine days in September
Brentwood, TN
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in September
Brentwood, 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
Brentwood, TN
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Brentwood, TN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Brentwood, Tennessee, USA
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