Alabama, USA
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Decatur, AL

The first month of the autumn, September, is also a moderately hot month in Decatur, Alabama, with average temperature varying between 84.4°F (29.1°C) and 60.3°F (15.7°C).


In Decatur, the average high-temperature marginally drops, from a tropical 90.3°F (32.4°C) in August, to a moderately hot 84.4°F (29.1°C). In September, the average low-temperature is 60.3°F (15.7°C).


Throughout September, in Decatur, 3.6" (90.9mm) of precipitation is accumulated. Throughout the year, in Decatur, Alabama, 53.4" (1355.9mm) of rain is accumulated.


The average length of the day in September is 12.4h.

What is the temperature in September in Decatur?

In Decatur, in September, the average high-temperature is 84.4°F (29.1°C), and the average low-temperature is 60.3°F (15.7°C).

How much does it rain in Decatur in September?

During September, Decatur regularly aggregates up to 3.6" (90.9mm) of precipitation.

How many hours of daylight does Decatur have in September?

In September, the average length of the day in Decatur, Alabama, is 12.4h.
Average temperature in September - Decatur, AL
  • Average high temperature in September: 84.4°F

Warmest months (with the highest average high temperature) are July and August (90.3°F).
The month with the lowest average high temperature is January (50.1°F).

  • Average low temperature in September: 60.3°F

The month with the highest average low temperature is July (68.8°F).
The coldest month (with the lowest average low temperature) is January (31°F).

Average rainfall in September - Decatur, AL
  • Average rainfall in September: 3.6"

The wettest month (with the highest rainfall) is December (5.7").
The driest month (with the lowest rainfall) is October (3.5").

Average daylight in September - Decatur, AL
  • Average daylight in September: 12.4h

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