September weather forecast and climate
Black, AL

September, the first month of the autumn, in Black, is still a hot month, with temperature in the range of an average low of 69.6°F (20.9°C) and an average high of 86.9°F (30.5°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still tropical 86.9°F (30.5°C). In September, the average low-temperature is 69.6°F (20.9°C).

Heat index

The average heat index is estimated at a sweltering 99.9°F (37.7°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like wind, metabolic differences, clothing, and activity influence one's weather impression. Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. 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 in Black is 75%.

Rainfall

September is the month with the least rainfall. Rain falls for 8.6 days and accumulates 0.28" (7mm) of precipitation.

Daylight

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

Sunshine

In September, the average sunshine in Black is 8.9h.

UV index

In Black, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high threat to health from unsafe exposure to the UV radiation for average individuals.
Note: The average daily UV index of 6 transform into the following instructions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Black?

In Black, Alabama, in September, the average high-temperature is 86.9°F (30.5°C), and the average low-temperature is 69.6°F (20.9°C). In September, the average heat index (a.k.a. 'real feel', 'apparent temperature'), that combines both air temperature and relative humidity, is calculated to 99.9°F (37.7°C).

What is the average humidity in September in Black?

In Black, the average relative humidity in September is 75%.

How much does it rain in Black in September?

In September, the rain falls for 8.6 days. Throughout September, 0.28" (7mm) of precipitation is accumulated.

What is the driest month in Black?

September is the month with the least rainfall in Black. Rain falls for 8.6 days and accumulates 0.28" (7mm) of precipitation.

How many hours of daylight does Black have in September?

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

How long on average sun shines in September in Black?

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

What is the UV index reading in September in Black?

The average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high health threat from the exposure to the Sun's UV rays.
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"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June, August and September (29.98").

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%

Months with the highest relative humidity are August and December (76%).
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

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: 12.3h

The month with the longest days is June (Average daylight: 14.1h).
The month with the shortest days is December (Average daylight: 10.2h).

  • Average sunshine in September: 8.9h

The month with the most sunshine is June (Average sunshine: 10.9h).
The month with the least sunshine is February (Average sunshine: 5.3h).

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

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 - 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

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