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
The shift into September reveals an average high-temperature of a still tropical 87.3°F (30.7°C), closely mirroring August's climate. Throughout the nights in September, an average low-temperature of 68.7°F (20.4°C) is noted.Heat index
In September, the heat index is estimated at a torrid 100.4°F (38°C). Undertake enhanced precautions, heat exhaustion and heat cramps are possible risks. Continuous activity could trigger heatstroke.Bear in mind that the heat index values are determined for shaded areas and light breezes. A rise of up to 15 Fahrenheit (8 Celsius) degrees in the heat index could result from direct sunlight.
Note: The heat index, also known as 'feels like' or 'felt air temperature', ties air temperature with relative humidity to produce the perceived temperature sensation. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. Being aware that direct sunlight can impact the felt heat might mean an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Perspiration and the resultant sweat evaporation are the body's natural thermostat, helping regulate temperature. Greater relative humidity lessens the rate of evaporation, thus decreasing the body's heat dispersal, which gives rise to a sensation of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.
Humidity
The average relative humidity in September is 74%.Rainfall
The 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.Snowfall
In Brooklyn, snow does not fall in March through November.Daylight
In Brooklyn, the average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:23 am and sunset at 7:10 pm. On the last day of September, 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 reading of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 6 during September leads to these advisories:
Take precautions and adopt sun safety practices. Protection against sunburn is obliged. Stay in the shade and avoid direct Sun exposure from 10 a.m. to 4 p.m., a time when UV radiation is at its strongest, and remember that parasols or canopies do not offer full protection. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
How hot does it get in Brooklyn in September?
What is the average humidity in September in Brooklyn?
What is the driest month in Brooklyn?
How much does it rain in Brooklyn in September?
When it does not snow in Brooklyn?
What is the average length of the day in September in Brooklyn?
When is the sunrise / sunset in September in Brooklyn?
How long on average sun shines in September in Brooklyn?
What is the UV index intensity in September in Brooklyn?
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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