September weather forecast and climate
Cullman, AL

The first month of the autumn, September, is still a warm month in Cullman, Alabama, with temperature in the range of an average high of 83.5°F (28.6°C) and an average low of 64°F (17.8°C).

Temperature

In Cullman, the average high-temperature is almost the same as in August - a moderately hot 83.5°F (28.6°C). In Cullman, in September, the average low-temperature is 64°F (17.8°C).

Heat index

The average heat index is evaluated at a tropical 90.7°F (32.6°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 'feels like', 'felt air temperature', 'apparent temperature', or 'real feel', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (clothing, differences in body mass, height, and shape, wind). 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 particularly important for children. 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

In Cullman, the average relative humidity is 74%.

Rainfall

In Cullman, Alabama, during 14.4 rainfall days, 2.64" (67mm) of precipitation is typically accumulated. In Cullman, during the entire year, the rain falls for 176.2 days and collects up to 40.43" (1027mm) of precipitation.

Snowfall

April through October are months without snowfall in Cullman.

Daylight

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

Sunshine

In September, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 5 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.

What is the temperature in September in Cullman?

In September, in Cullman, Alabama, the average high-temperature is 83.5°F (28.6°C), and the average low-temperature is 64°F (17.8°C). The average heat index (a.k.a. 'real feel', 'feels like'), that combines both air temperature and relative humidity, in September is estimated at 90.7°F (32.6°C).

What is the average humidity in September in Cullman?

The average relative humidity in September in Cullman, Alabama, is 74%.

How much does it rain in Cullman in September?

In Cullman, during September, the rain falls for 14.4 days and regularly aggregates up to 2.64" (67mm) of precipitation.

When it does not snow in Cullman?

In Cullman snow does not fall in April through October.

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

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

How long on average sun shines in September in Cullman?

The average sunshine in September in Cullman is 8.9h.

What is the UV index intensity in September in Cullman?

In September, the average daily maximum UV index in Cullman is 5. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to the UV radiation.
Average temperature in September - Cullman, AL
  • Average high temperature in September: 83.5°F

The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (48.9°F).

  • Average low temperature in September: 64°F

The month with the highest average low temperature is July (69.6°F).
The coldest month (with the lowest average low temperature) is January (34°F).

Average pressure in September - Cullman, 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 - Cullman, AL
  • Average wind speed in September: 5.1mph

The windiest month (with the highest average wind speed) is February (7.9mph).
The calmest months (with the lowest average wind speed) are July and August (4.6mph).

Average humidity in September - Cullman, 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 (72%).

Average rainfall in September - Cullman, AL
  • Average rainfall in September: 2.64"

The wettest month (with the highest rainfall) is December (4.21").
The driest month (with the least rainfall) is November (2.36").

Average rainfall days in September - Cullman, AL
  • Average rainfall days in September: 14.4 days

The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is November (10.1 days).

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

The month with the highest snowfall is January (0.67").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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

The month with the highest number of snowfall days is February (1.5 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 - Cullman, 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: 8.9h

The month with the most sunshine is June (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.7h).

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

The month with the most sunshine days is October (19 days).
The month with the least sunshine days is July (8.6 days).

Average UV index in September - Cullman, 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 - Cullman, AL
  • Average cloud cover in September: 30

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

Average visibility in September - Cullman, 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).