September weather forecast and climate
Attalla, AL

September, the first month of the autumn, in Attalla, is also a moderately hot month, with temperature in the range of an average high of 83.8°F (28.8°C) and an average low of 63.9°F (17.7°C).

Temperature

In Attalla, the average high-temperature is practically the same as in August - a warm 83.8°F (28.8°C). In September, in Attalla, the average low-temperature is 63.9°F (17.7°C).

Heat index

The average heat index is evaluated at a hot 91.4°F (33°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. With the exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'apparent temperature', or 'feels like', is a measure that combines both air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like pregnancy, clothing, differences in body mass, height, and shape, 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. 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.

Humidity

The average relative humidity in Attalla, Alabama, is 74%.

Rainfall

September and October are months with the least rain when the rain falls for 13.5 days and typically aggregates up to 2.4" (61mm) of rain.

Snowfall

April through October are months without snowfall.

Daylight

In Attalla, the average length of the day is 12.4h.

Sunshine

The average sunshine in September is 8.6h.

UV index

The average daily maximum UV index in Attalla is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Attalla?

In Attalla, Alabama, in September, the average high-temperature is 83.8°F (28.8°C), and the average low-temperature is 63.9°F (17.7°C). In September, the average heat index (a.k.a. 'felt air temperature', 'real feel'), that combines relative humidity and air temperature, is estimated at 91.4°F (33°C).

What is the average humidity in September in Attalla?

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

How much does it rain in Attalla in September?

In Attalla, in September, during 13.5 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

What is the driest month in Attalla?

Months with the least rainfall in Attalla, Alabama, are September and October Rain falls for 13.5 days and accumulates 2.4" (61mm) of rain.

When it does not snow in Attalla?

In Attalla, Alabama, snow does not fall in April through October.

How many hours of daylight does Attalla have in September?

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

How many hours of sunshine does Attalla have in September?

The average sunshine in September in Attalla is 8.6h.

How high is the UV index in September in Attalla?

The average daily maximum UV index in September in Attalla is 5. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Attalla, AL
  • Average high temperature in September: 83.8°F

The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (49.6°F).

  • Average low temperature in September: 63.9°F

The month with the highest average low temperature is July (69.4°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).

Average pressure in September - Attalla, AL
  • Average pressure in September: 30.02"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.98").

Average wind speed in September - Attalla, AL
  • Average wind speed in September: 4.7mph

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 (4.2mph).

Average humidity in September - Attalla, AL
  • Average humidity in September: 74%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (73%).

Average rainfall in September - Attalla, AL
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is December (4.17").
The driest months (with the least rainfall) are September and October (2.4").

Average rainfall days in September - Attalla, AL
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (21.2 days).
The month with the least rainy days is November (9.4 days).

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

The month with the highest snowfall is February (0.55").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is February (1.7 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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

The month with the longest days is June (Average daylight: 14.4h).
The month with the shortest days is December (Average daylight: 9.9h).

  • Average sunshine in September: 8.6h

The month with the most sunshine is June (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days in September - Attalla, AL
  • Average sunshine days in September: 13.5 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (7.8 days).

Average UV index in September - Attalla, AL
  • Average UV index in September: 5

Months with the highest UV index are May, June, July and August (UV index 6).
Months with the lowest UV index are January and December (UV index 2).

Average cloud cover in September - Attalla, AL
  • Average cloud cover in September: 31

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 30).

Average visibility in September - Attalla, 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).