September weather forecast and climate
Duff Settlement, AL

September, the first month of the autumn, in Duff Settlement, is still a tropical month, with temperature in the range of an average low of 66.9°F (19.4°C) and an average high of 86.5°F (30.3°C).

Temperature

In Duff Settlement, the average high-temperature is relatively the same as in August - a still tropical 86.5°F (30.3°C). In Duff Settlement, the average low-temperature is 66.9°F (19.4°C).

Heat index

The average heat index is estimated at a very hot 97.3°F (36.3°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
Take into consideration that the heat index values are calculated for shade and light wind conditions. 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', 'feels like', 'real feel', or 'felt air temperature', is a measure of how hot it feels when the actual air humidity is factored in. 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). Be aware that direct exposure to sunlight increases heat impact, and may raise the heat index additionally, 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.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

The average relative humidity in September is 72%.

Rainfall

The month with the least rainfall is September when the rain falls for 9.8 days and typically collects 0.59" (15mm) of precipitation.

Snowfall

March through November are months without snowfall in Duff Settlement.

Daylight

In Duff Settlement, the average length of the day is 12.4h.

Sunshine

The average sunshine in Duff Settlement, Alabama, is 9.1h.

UV index

In September, the average daily maximum UV index in Duff Settlement, Alabama, is 6. A UV Index reading of 6 to 7 represents a high health risk from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 6 in September interpret into the following advice:
Take precautions against overexposure. Protection against sun damage is needed. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.

What is the temperature in September in Duff Settlement?

In Duff Settlement, in September, the average high-temperature is 86.5°F (30.3°C), and the average low-temperature is 66.9°F (19.4°C). In September, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), that combines air temperature and relative humidity, is evaluated at 97.3°F (36.3°C).

What is the average humidity in September in Duff Settlement?

In September, the average relative humidity is 72%.

How many days does it rain in September in Duff Settlement?

In Duff Settlement, in September, during 9.8 rainfall days, 0.59" (15mm) of precipitation is typically accumulated.

What is the driest month in Duff Settlement?

September is the month with the least rainfall. Rain falls for 9.8 days and accumulates 0.59" (15mm) of precipitation.

When it does not snow in Duff Settlement?

In Duff Settlement snow does not fall in March through November.

What is the average length of the day in September in Duff Settlement?

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

How many hours of sunshine does Duff Settlement have in September?

In Duff Settlement, Alabama, the average sunshine in September is 9.1h.

How high is the UV index in September in Duff Settlement?

In Duff Settlement, Alabama, the average daily maximum UV index in September is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unprotected exposure to the UV radiation.
Average temperature in September - Duff Settlement, AL
  • Average high temperature in September: 86.5°F

The warmest month (with the highest average high temperature) is July (91.8°F).
The month with the lowest average high temperature is January (52.7°F).

  • Average low temperature in September: 66.9°F

The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (37.2°F).

Average pressure in September - Duff Settlement, AL
  • Average pressure in September: 30"

The month with the highest atmospheric pressure is January (30.17").
The month with the lowest atmospheric pressure is June (29.97").

Average wind speed in September - Duff Settlement, AL
  • Average wind speed in September: 5.1mph

The windiest month (with the highest average wind speed) is February (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).

Average humidity in September - Duff Settlement, AL
  • Average humidity in September: 72%

The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (70%).

Average rainfall in September - Duff Settlement, AL
  • Average rainfall in September: 0.59"

The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is September (0.59").

Average rainfall days in September - Duff Settlement, AL
  • Average rainfall days in September: 9.8 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (6 days).

Average snowfall in September - Duff Settlement, AL
  • Average snowfall in September: 0"

Months with the highest snowfall are January and February (0.12").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

Average snowfall days in September - Duff Settlement, AL
  • Average snowfall days in September: 0 days

Months with the highest number of snowfall days are January and February (0.6 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 - Duff Settlement, AL
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.3h).
The month with the shortest days is December (Average daylight: 10h).

  • Average sunshine in September: 9.1h

The month with the most sunshine is June (Average sunshine: 10.7h).
Months with the least sunshine are February and December (Average sunshine: 4.9).

Average sunshine days in September - Duff Settlement, AL
  • Average sunshine days in September: 17.5 days

The month with the most sunshine days is October (23.3 days).
The month with the least sunshine days is July (10 days).

Average UV index in September - Duff Settlement, AL
  • Average UV index in September: 6

Months with the highest UV index are June and July (UV index 7).
Months with the lowest UV index are January, February and December (UV index 3).

Average cloud cover in September - Duff Settlement, AL
  • Average cloud cover in September: 30

Months with the most cloud cover are February and December (Cloud cover 47).
The month with the least cloud cover is October (Cloud cover 29).

Average visibility in September - Duff Settlement, 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).