September weather forecast
Birmingham, AL

The colorful evening sky in Birmingham City, Alabama
The colorful evening sky in Birmingham City, Alabama

Weather in September

September, the first month of the autumn, in Birmingham, is also a moderately hot month, with temperature in the range of an average high of 84.9°F (29.4°C) and an average low of 65.3°F (18.5°C).

Temperature

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

Heat index

The average heat index in September is estimated 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 'apparent temperature', 'real feel', 'feels like', or 'felt air temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. Additional factors like activity, clothing, wind, and pregnancy affect individual temperature impact. Be aware that direct exposure to sunlight increases heat impact and may raise the 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 Birmingham is 72%.

Rainfall

In Birmingham, during 12.1 rainfall days, 1.1" (28mm) of precipitation is typically accumulated. 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, the average length of the day is 12.4h.

Sunshine

In September, the average sunshine is 8.8h.

UV index

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: The daily maximum UV index of 5 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.
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FAQ

What is the temperature in September in Birmingham?

The average high-temperature, in September, in Birmingham, is 84.9°F (29.4°C), while the average low-temperature is 65.3°F (18.5°C). In September, the average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, is estimated at 93.2°F (34°C).

What is the average humidity in September in Birmingham?

The average relative humidity in September is 72%.

How many days does it rain in September in Birmingham?

In Birmingham, during September, the rain falls for 12.1 days and regularly aggregates up to 1.1" (28mm) of precipitation.

When it does not snow in Birmingham?

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

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

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

How many hours of sunshine does Birmingham have in September?

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

How high is the UV index in September in Birmingham?

The average daily maximum UV index in September in Birmingham is 5. A UV Index reading of 3 to 5 represents a moderate vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Birmingham, AL

Average temperature in September - Birmingham, AL
  • Average high temperature in September: 29.4°C

The warmest month (with the highest average high temperature) is July (32.8°C).
The month with the lowest average high temperature is January (10.4°C).

  • Average low temperature in September: 18.5°C

The month with the highest average low temperature is July (21.7°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).

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Average pressure in September
Birmingham, AL

Average pressure in September - Birmingham, AL
  • Average pressure in September: 1016.3mbar

The month with the highest atmospheric pressure is January (1021.7mbar).
The month with the lowest atmospheric pressure is June (1015.1mbar).

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Average wind speed in September
Birmingham, AL

Average wind speed in September - Birmingham, AL
  • Average wind speed in September: 7.8km/h

The windiest month (with the highest average wind speed) is February (11.9km/h).
The calmest months (with the lowest average wind speed) are July and August (7.2km/h).

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Average humidity in September
Birmingham, AL

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%).

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Average rainfall in September
Birmingham, AL

Average rainfall in September - Birmingham, AL
  • Average rainfall in September: 28mm

The wettest month (with the highest rainfall) is June (50mm).
The driest month (with the least rainfall) is November (26mm).

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Average rainfall days in September
Birmingham, AL

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).

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Average snowfall in September
Birmingham, AL

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

The month with the highest snowfall is January (3mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

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Average snowfall days in September
Birmingham, AL

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).

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Average daylight in September /
Average sunshine in September
Birmingham, AL

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).

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Average sunshine days in September
Birmingham, AL

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).

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Average UV index in September
Birmingham, AL

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).

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Average cloud cover in September
Birmingham, AL

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).

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Average visibility in September
Birmingham, AL

Average visibility in September - Birmingham, AL
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).

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