September weather forecast and climate
Cooper, AL

The first month of the autumn, September, is also a hot month in Cooper, Alabama, with average temperature fluctuating between 66.7°F (19.3°C) and 86°F (30°C).

Temperature

In September, the average high-temperature is almost the same as in August - a still tropical 86°F (30°C). In September, in Cooper, the average low-temperature is 66.7°F (19.3°C).

Heat index

The average heat index in September is evaluated at a very hot 96.4°F (35.8°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', 'feels like', 'felt air temperature', or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, pregnancy, differences in body mass, height, and shape), and activity. 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. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. 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

The average relative humidity in Cooper, Alabama, is 73%.

Rainfall

September is the month with the least rainfall. Rain falls for 14.1 days and accumulates 2.17" (55mm) of precipitation.

Snowfall

April through October are months without snowfall.

Daylight

In Cooper, the average length of the day in September is 12.4h.

Sunshine

The average sunshine in September is 8.8h.

UV index

In September, the average daily maximum UV index is 6. A UV Index reading of 6 to 7 represents a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions against overexposure. Protection against sun damage is needed. 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Cooper?

The average high-temperature, in September, in Cooper, Alabama, is 86°F (30°C), while the average low-temperature is 66.7°F (19.3°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that represents influence of the relative humidity to air temperaure, is calculated to 96.4°F (35.8°C).

What is the average humidity in September in Cooper?

In Cooper, the average relative humidity in September is 73%.

How much does it rain in Cooper in September?

In September, the rain falls for 14.1 days. Throughout September, 2.17" (55mm) of precipitation is accumulated.

What is the driest month in Cooper?

The month with the least rainfall is September when the rain falls for 14.1 days and typically collects 2.17" (55mm) of precipitation.

When it does not snow in Cooper?

April through October are months without snowfall in Cooper, Alabama.

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

In Cooper, Alabama, the average length of the day in September is 12.4h.

How many hours of sunshine does Cooper have in September?

The average sunshine in September is 8.8h.

How high is the UV index in September in Cooper?

In September, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Cooper, AL
  • Average high temperature in September: 86°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (52.9°F).

  • Average low temperature in September: 66.7°F

Months with the highest average low temperature are July and August (71.2°F).
The coldest month (with the lowest average low temperature) is January (37°F).

Average pressure in September - Cooper, AL
  • Average pressure in September: 30"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.97").

Average wind speed in September - Cooper, AL
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).

Average humidity in September - Cooper, AL
  • Average humidity in September: 73%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September - Cooper, AL
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is April (3.86").
The driest month (with the least rainfall) is September (2.17").

Average rainfall days in September - Cooper, AL
  • Average rainfall days in September: 14.1 days

The month with the highest number of rainy days is July (21.1 days).
The month with the least rainy days is November (7.9 days).

Average snowfall in September - Cooper, AL
  • Average snowfall in September: 0"

The month with the highest snowfall is December (0.51").
Months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September - Cooper, AL
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (0.9 days).
Months with the least snowfall days are April, May, June, July, August, September and October (0 days).

Average daylight in September / Average sunshine in September - Cooper, AL
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is June (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.9h).

Average sunshine days in September - Cooper, AL
  • Average sunshine days in September: 13.6 days

The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is July (7.8 days).

Average UV index in September - Cooper, AL
  • Average UV index in September: 6

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

Average cloud cover in September - Cooper, AL
  • Average cloud cover in September: 30

Months with the most cloud cover are February and December (Cloud cover 46).
Months with the least cloud cover are September and October (Cloud cover 30).

Average visibility in September - Cooper, 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).