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 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
Transitioning into September, Brooklyn records an average high-temperature of a still hot 87.3°F (30.7°C), almost identical to August's 90.7°F (32.6°C). September nights cool down to an average low-temperature of 68.7°F (20.4°C).Heat index
For September, the heat index is estimated at a fiery hot 100.4°F (38°C). Use additional protective measures, heat cramps and heat exhaustion are possible outcomes. Continuous activity might lead to heatstroke.The metrics for the heat index are tailored for both shady environments and light winds. 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 'feels like', joins air temperature with relative humidity to produce a temperature perception for humans. 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. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are quite important for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. Inadequate heat shedding in the face of rising body temperatures hints at potential dehydration risks.
Humidity
In Brooklyn, the average relative humidity in September is 74%.Rainfall
March, September and November are months with the least rain when the rain falls for 12.1 days and typically aggregates up to 0.75" (19mm) of rain.Snowfall
In Brooklyn, snow does not fall in March through November.Daylight
In September, the average length of the day is 12h and 20min.On the first day of September, sunrise is at 6:23 am and sunset at 7:10 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:33 pm CDT.
Sunshine
In Brooklyn, the average sunshine in September is 8.9h.UV index
In Brooklyn, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Follow precautions and abide by sun safety rules. Deterrence of sunburn is imperative. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Brooklyn have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Brooklyn have in September?
What is the UV index reading in September?
Average temperature in September
Brooklyn, AL
- Average high temperature in September: 87.3°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (57.7°F).
- Average low temperature in September: 68.7°F
The months with the highest average low temperature are July and August (73°F).
The coldest month (with the lowest average low temperature) is January (40.3°F).
Average pressure in September
Brooklyn, AL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in September
Brooklyn, AL
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is January (6.9mph).
The calmest month (with the lowest average wind speed) is August (4.5mph).
Average humidity in September
Brooklyn, AL
- Average humidity in September: 74%
The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Brooklyn, AL
- Average rainfall in September: 0.75"
The wettest month (with the highest rainfall) is August (1.65").
The driest months (with the least rainfall) are March, September and November (0.75").
Average rainfall days in September
Brooklyn, AL
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (5.7 days).
Average snowfall days in September
Brooklyn, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.2 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Brooklyn, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The months with the least sunshine are February and December (Average sunshine: 5h and 12min).
Average sunshine days in September
Brooklyn, AL
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is November (23.1 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in September
Brooklyn, AL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Brooklyn, AL
- Average cloud cover in September: 31
The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Brooklyn, AL
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, May, June, October and November (6mi).
The months with the lowest visibility are February, July, August, September and December (5mi).
Brooklyn, Alabama, USA
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