September weather forecast and climate
Sumiton, AL

Weather in September

The first month of the autumn, September, is still a warm month in Sumiton, Alabama, with average temperature varying between 85.1°F (29.5°C) and 65.3°F (18.5°C).

Temperature

In September, the average high-temperature is practically the same as in August - a warm 85.1°F (29.5°C). The average low-temperature, in Sumiton, is 65.3°F (18.5°C).

Heat index

The average heat index in September is estimated at a tropical 93.7°F (34.3°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. 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 'felt air temperature', 'feels like', 'apparent temperature', or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is subjective, depending on the activity and individual's heat perception influenced by various reasons (metabolic differences, clothing, pregnancy). 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

The average relative humidity in September is 72%.

Rainfall

September is the month with the least rainfall in Sumiton. Rain falls for 11.3 days and accumulates 0.75" (19mm) of precipitation.

Snowfall

March through October are months without snowfall.

Daylight

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

Sunshine

In Sumiton, the average sunshine in September is 9h.

UV index

In Sumiton, the average daily maximum UV index is 6. A UV Index value of 6 to 7 symbolizes a high health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
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. 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 Sumiton?

In September, the average high-temperature is 85.1°F (29.5°C), and the average low-temperature is 65.3°F (18.5°C). The average heat index (a.k.a. 'felt air temperature', 'real feel'), that factores the actual air temperature with the relative humidity, in September is evaluated at 93.7°F (34.3°C).

What is the average humidity in September in Sumiton?

In September, the average relative humidity in Sumiton is 72%.

How much does it rain in Sumiton in September?

In Sumiton, Alabama, in September, during 11.3 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

What is the driest month in Sumiton?

September is the month with the least rainfall in Sumiton. Rain falls for 11.3 days and accumulates 0.75" (19mm) of precipitation.

When it does not snow in Sumiton?

In Sumiton, Alabama, snow does not fall in March through October.

How many hours of daylight does Sumiton have in September?

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

How long on average sun shines in September in Sumiton?

In September, the average sunshine in Sumiton is 9h.

How high is the UV index in September in Sumiton?

The average daily maximum UV index in September in Sumiton, Alabama, is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to the UV radiation.

Average temperature in September
Sumiton, AL

Average temperature in September - Sumiton, AL
  • Average high temperature in September: 85.1°F

The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (50.5°F).

  • Average low temperature in September: 65.3°F

Months with the highest average low temperature are July and August (70.3°F).
The coldest month (with the lowest average low temperature) is January (35.1°F).

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Average pressure in September
Sumiton, AL

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

The month with the highest atmospheric pressure is January (30.17").
Months with the lowest atmospheric pressure are June and August (29.98").

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Average wind speed in September
Sumiton, AL

Average wind speed in September - Sumiton, AL
  • Average wind speed in September: 5mph

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

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Average humidity in September
Sumiton, AL

Average humidity in September - Sumiton, 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 (71%).

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Average rainfall in September
Sumiton, AL

Average rainfall in September - Sumiton, AL
  • Average rainfall in September: 0.75"

The wettest months (with the highest rainfall) are July and August (1.46").
The driest month (with the least rainfall) is September (0.75").

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Average rainfall days in September
Sumiton, AL

Average rainfall days in September - Sumiton, AL
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is July (15.8 days).
Months with the least rainy days are October and November (7.1 days).

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Average snowfall in September
Sumiton, AL

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

The month with the highest snowfall is January (0.28").
Months with the least snowfall are March, April, May, June, July, August, September and October (0").

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Average snowfall days in September
Sumiton, AL

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

The month with the highest number of snowfall days is January (1.3 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
Sumiton, AL

Average daylight in September / Average sunshine in September - Sumiton, 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: 9h

Months with the most sunshine are June and July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in September
Sumiton, AL

Average sunshine days in September - Sumiton, AL
  • Average sunshine days in September: 16.1 days

The month with the most sunshine days is October (22.6 days).
The month with the least sunshine days is July (11.5 days).

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Average UV index in September
Sumiton, AL

Average UV index in September - Sumiton, AL
  • Average UV index in September: 6

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
Sumiton, AL

Average cloud cover in September - Sumiton, AL
  • Average cloud cover in September: 29

Months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in September
Sumiton, AL

Average visibility in September - Sumiton, 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).

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