September weather forecast and climate
Brooklyn, AL

September, the first month of the autumn, in Brooklyn, is still a tropical month, with average temperature fluctuating between 68.7°F (20.4°C) and 87.3°F (30.7°C).

Temperature

In Brooklyn, the average high-temperature in September is practically the same as in August - a still hot 87.3°F (30.7°C). In September, in Brooklyn, Alabama, the average low-temperature is 68.7°F (20.4°C).

Heat index

In September, the average heat index is calculated to a torrid 100.4°F (38°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like pregnancy, wind, clothing, and activity influence one's weather impression. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In September, the average relative humidity is 74%.

Rainfall

March, September and November are months with the least rain in Brooklyn, Alabama, 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 Brooklyn, the average length of the day in September is 12.3h.

Sunshine

In Brooklyn, the average sunshine is 8.9h.

UV index

In Brooklyn, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 interpret into the following advice:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Brooklyn?

In September, in Brooklyn, Alabama, the average high-temperature is 87.3°F (30.7°C), and the average low-temperature is 68.7°F (20.4°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), that calculates temperature value influenced by the moisture in the air, is evaluated at 100.4°F (38°C).

What is the average humidity in September in Brooklyn?

In Brooklyn, the average relative humidity in September is 74%.

How much does it rain in Brooklyn in September?

In Brooklyn, Alabama, in September, it is raining for 12.1 days, with typically 0.75" (19mm) of accumulated precipitation.

What is the driest month in Brooklyn?

Months with the least rainfall in Brooklyn are March, September and November Rain falls for 12.1 days and accumulates 0.75" (19mm) of rain.

When it does not snow in Brooklyn?

March through November are months without snowfall.

What is the average length of the day in September in Brooklyn?

In Brooklyn, Alabama, the average length of the day in September is 12.3h.

How many hours of sunshine does Brooklyn have in September?

In September, the average sunshine in Brooklyn, Alabama, is 8.9h.

What is the UV index intensity in September in Brooklyn?

In Brooklyn, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unprotected exposure to the UV radiation.
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

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"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June and August (29.97").

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).
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: 12.3h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 8.9h

The month with the most sunshine is June (Average sunshine: 10.8h).
Months with the least sunshine are February and December (Average sunshine: 5.2).

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

Months with the highest UV index are May, June, July and August (UV index 7).
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

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