September weather forecast and climate
Birmingham, AL

The colorful evening sky in Birmingham City, Alabama
The colorful evening sky in Birmingham City, Alabama
September, the first month of the autumn, in Birmingham, is also a moderately hot month, with average temperature ranging between max 84.9°F (29.4°C) and min 65.3°F (18.5°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a warm 84.9°F (29.4°C). In Birmingham, the average low-temperature is 65.3°F (18.5°C).

Heat index

The average heat index in September is evaluated at a tropical 93.2°F (34°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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', 'apparent temperature', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, wind, clothing), 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. 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.

Humidity

The average relative humidity in Birmingham is 72%.

Rainfall

In Birmingham, Alabama, it is raining for 12.1 days, with typically 1.1" (28mm) of accumulated precipitation. In Birmingham, during the entire year, the rain falls for 143.1 days and collects up to 18.58" (472mm) of precipitation.

Snowfall

In Birmingham snow does not fall in April through October.

Daylight

In Birmingham, Alabama, the average length of the day is 12.4h.

Sunshine

In Birmingham, Alabama, the average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for the average person.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Birmingham?

The average high-temperature, in September, in Birmingham, Alabama, is 84.9°F (29.4°C), while the average low-temperature is 65.3°F (18.5°C). The average heat index (a.k.a. 'real feel', 'felt air temperature'), that factores the actual air temperature with the relative humidity, in September is calculated to 93.2°F (34°C).

What is the average humidity in September in Birmingham?

The average relative humidity in September is 72%.

How much does it rain in Birmingham in September?

In Birmingham, in September, it is raining for 12.1 days, with typically 1.1" (28mm) of accumulated precipitation.

When it does not snow in Birmingham?

In Birmingham snow does not fall in April through October.

How many hours of daylight does Birmingham have in September?

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

How long on average sun shines in September in Birmingham?

In Birmingham, Alabama, the average sunshine in September is 8.8h.

What is the UV index intensity in September in Birmingham?

In Birmingham, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Birmingham, AL
  • Average high temperature in September: 84.9°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (50.7°F).

  • Average low temperature in September: 65.3°F

The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is January (35.2°F).

Average pressure in September - Birmingham, AL
  • Average pressure in September: 30.01"

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 - Birmingham, AL
  • Average wind speed in September: 4.8mph

The windiest month (with the highest average wind speed) is February (7.4mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September - Birmingham, AL
  • Average humidity in September: 72%

The month with the highest relative humidity is December (79%).
The month with the lowest relative humidity is October (71%).

Average rainfall in September - Birmingham, AL
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is June (1.97").
The driest month (with the least rainfall) is November (1.02").

Average rainfall days in September - Birmingham, AL
  • Average rainfall days in September: 12.1 days

The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (7.9 days).

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

The month with the highest snowfall is January (0.12").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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

Months with the highest number of snowfall days are January and February (0.8 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 - Birmingham, 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: 10h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is July (Average sunshine: 10.7h).
The month with the least sunshine is February (Average sunshine: 4.7h).

Average sunshine days in September - Birmingham, AL
  • Average sunshine days in September: 15.7 days

The month with the most sunshine days is October (20.9 days).
The month with the least sunshine days is July (11.1 days).

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

Months with the highest UV index are July and August (UV index 7).
The month with the lowest UV index is December (UV index 2).

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

The month with the most cloud cover is February (Cloud cover 48).
Months with the least cloud cover are June and September (Cloud cover 30).

Average visibility in September - Birmingham, 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).