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
With the commencement of September, Brentwood records a moderate temperature decline, with the average high easing from August's tropical 88.3°F (31.3°C) to a moderately hot 81.5°F (27.5°C). Brentwood in September experiences a low-temperature average of 61.3°F (16.3°C).Heat index
The heat index value during September is appraised at a tropical 86°F (30°C). Continued exposure and engagement in activity might trigger tiredness and subsequently heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. Exposure to unobstructed sunshine could lead to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', combines air temperature and relative humidity to represent a human perceived temperature equivalent. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. It is important to note that direct sunlight can intensify the weather impact, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for children. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Humidity
In September, the average relative humidity is 73%.Rainfall
In Brentwood, during September, the rain falls for 10 days and regularly aggregates up to 1.26" (32mm) of precipitation. Throughout the year, there are 120.5 rainfall days, and 16.18" (411mm) of precipitation is accumulated.Snowfall
In Brentwood, snow does not fall in June through October.Daylight
In Brentwood, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:48 am and sunset at 7:43 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 7:01 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Guard yourself - Avoiding sunburn is suggested. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
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 are sunrise and 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, AR
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is January (44.4°F).
- Average low temperature in September: 61.3°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in September
Brentwood, AR
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Brentwood, AR
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is July (5.8mph).
Average humidity in September
Brentwood, AR
- Average humidity in September: 73%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are August and October (72%).
Average rainfall in September
Brentwood, AR
- Average rainfall in September: 1.26"
The wettest month (with the highest rainfall) is August (2.17").
The driest month (with the least rainfall) is February (0.83").
Average rainfall days in September
Brentwood, AR
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is December (6.5 days).
Average snowfall in September
Brentwood, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.47").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Brentwood, AR
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (2.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Brentwood, AR
- 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: 9h and 3min
The month with the most sunshine is August (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Brentwood, AR
- Average sunshine days in September: 17.6 days
The months with the most sunshine days are January and December (22 days).
The month with the least sunshine days is April (14.3 days).
Average UV index in September
Brentwood, AR
- 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, AR
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in September
Brentwood, AR
- 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, Arkansas, USA
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