September weather forecastBlack, AL
September
Weather in September
The first month of the autumn, September, is also a hot month in Black, Alabama, with an average temperature varying between 69.6°F (20.9°C) and 86.9°F (30.5°C).Temperature
The average high-temperature during September registers at a still tropical 86.9°F (30.5°C), closely corresponding to the preceding month. In Black, September nights witness a steady temperature drop to a pleasant 69.6°F (20.9°C).Heat index
The heat index in September is appraised at a torrid 100.4°F (38°C). Exercise increased caution, heat cramps and heat exhaustion are potential hazards. Continuous activity could lead to heatstroke.The standards for the heat index are set for locations in shade and under light breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. Elements such as metabolic variations, pregnancy, and physical exertion can shape one's weather perception. With direct sunlight, be aware that it might enhance the heat sensation, raising the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
In response to overheating, the human body perspires to cool down, mainly through the evaporation of sweat. Higher relative humidity impedes evaporation, thus reducing heat dispersion from the body, culminating in a sensation of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
The average relative humidity in September is 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 8.6 days and typically collects 0.28" (7mm) of precipitation.Daylight
The average length of the day in September is 12h and 20min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:05 pm. On the last day of September, sunrise is at 6:36 am and sunset at 6:28 pm CDT.
Sunshine
The average sunshine in September in Black is 8.9h.UV index
The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: The average daily UV index of 6 in September transforms into the following instructions:
Use protective steps and abide by sun safety guidelines. Safeguarding against skin and eye harm is necessary. Between 10 a.m. and 4 p.m., the Sun's UV radiation is at its peak. Limit your exposure to direct sunlight during these hours. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Black, AL
- Average high temperature in September: 86.9°F
The warmest month (with the highest average high temperature) is July (90.7°F).
The month with the lowest average high temperature is January (58.8°F).
- Average low temperature in September: 69.6°F
The month with the highest average low temperature is August (74.1°F).
The coldest month (with the lowest average low temperature) is January (41.5°F).
Average pressure in September
Black, 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, August and September (29.98"Hg).
Average wind speed in September
Black, AL
- Average wind speed in September: 5.3mph
The windiest months (with the highest average wind speed) are January, February and March (7.3mph).
The calmest month (with the lowest average wind speed) is August (5mph).
Average humidity in September
Black, AL
- Average humidity in September: 75%
The months with the highest relative humidity are August and December (76%).
The months with the lowest relative humidity are May and October (70%).
Average rainfall in September
Black, AL
- Average rainfall in September: 0.28"
The wettest month (with the highest rainfall) is August (0.98").
The driest month (with the least rainfall) is September (0.28").
Average rainfall days in September
Black, AL
- Average rainfall days in September: 8.6 days
The months with the highest number of rainy days are July and August (13.3 days).
The month with the least rainy days is November (4.7 days).
Average daylight in September /
Average sunshine in September
Black, AL
- Average daylight in September: 12h and 18min
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 54min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 18min).
Average sunshine days in September
Black, AL
- Average sunshine days in September: 16.9 days
The month with the most sunshine days is November (24.4 days).
The month with the least sunshine days is July (13.2 days).
Average UV index in September
Black, 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
Black, AL
- Average cloud cover in September: 29
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 26).
Average visibility in September
Black, AL
- 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).
