September weather forecast and climate
Jack, AL

Weather in September

September, the first month of the autumn, in Jack, is still a hot month, with average temperature ranging between max 86.9°F (30.5°C) and min 68.9°F (20.5°C).

Temperature

In September, the average high-temperature is essentially the same as in August - a still tropical 86.9°F (30.5°C). In Jack, Alabama, the average low-temperature is 68.9°F (20.5°C).

Heat index

In September, the average heat index is calculated to a sweltering 98.8°F (37.1°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 'feels like', 'apparent temperature', 'real feel', or 'felt air temperature', is a calculated temperature value of how hot it feels when the moisture in the air is factored in. Additional factors like activity, wind, clothing, and differences in body mass, height, and shape affect individual temperature impact. 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.
To prevent overheating and help regulate its internal temperature, the human body sweat and rely on the evaporation to cool down. A higher relative humidity affects normal body cooling by reducing the evaporation rate, subsequently lowering the rate at which the body cools and increasing the perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.

Humidity

In September, the average relative humidity is 73%.

Rainfall

In Jack, in September, it is raining for 14.5 days, with typically 1.5" (38mm) of accumulated precipitation. Throughout the year, in Jack, there are 150.2 rainfall days, and 21.18" (538mm) of precipitation is accumulated.

Snowfall

In Jack snow does not fall in March through December.

Daylight

The average length of the day in Jack is 12.3h.

Sunshine

The average sunshine in Jack is 8.8h.

UV index

The average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 6 translate into the following recommendations:
Take precautions and utilize sun safety practices. Protection against the skin and eye damage is required. 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
[Resources]

FAQ

What is the temperature in September in Jack?

In September, in Jack, Alabama, the average high-temperature is 86.9°F (30.5°C), and the average low-temperature is 68.9°F (20.5°C). In September, the average heat index (a.k.a. 'real feel', 'feels like'), that represents influence of the relative humidity to air temperaure, is estimated at 98.8°F (37.1°C).

What is the average humidity in September in Jack?

In Jack, Alabama, the average relative humidity in September is 73%.

How much does it rain in Jack in September?

In Jack, in September, it is raining for 14.5 days, with typically 1.5" (38mm) of accumulated precipitation.

When it does not snow in Jack?

In Jack snow does not fall in March through December.

How many hours of daylight does Jack have in September?

In September, the average length of the day is 12.3h.

How long on average sun shines in September in Jack?

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

What is the UV index reading in September in Jack?

In September, the average daily maximum UV index in Jack is 6. A UV Index estimate of 6 to 7 represents a high hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in September
Jack, AL

Average temperature in September - Jack, AL
  • Average high temperature in September: 86.9°F

The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (57.7°F).

  • Average low temperature in September: 68.9°F

The month with the highest average low temperature is August (73.2°F).
The coldest month (with the lowest average low temperature) is January (40.6°F).

[Resources]

Average pressure in September
Jack, AL

Average pressure in September - Jack, AL
  • Average pressure in September: 29.99"

The month with the highest atmospheric pressure is January (30.16").
Months with the lowest atmospheric pressure are June and August (29.97").

[Resources]

Average wind speed in September
Jack, AL

Average wind speed in September - Jack, AL
  • Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is January (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

[Resources]

Average humidity in September
Jack, AL

Average humidity in September - Jack, AL
  • Average humidity in September: 73%

The month with the highest relative humidity is December (77%).
The month with the lowest relative humidity is October (69%).

[Resources]

Average rainfall in September
Jack, AL

Average rainfall in September - Jack, AL
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is August (3.19").
The driest month (with the least rainfall) is November (1.22").

[Resources]

Average rainfall days in September
Jack, AL

Average rainfall days in September - Jack, AL
  • Average rainfall days in September: 14.5 days

The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is November (6.8 days).

[Resources]

Average snowfall in September
Jack, AL

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

The month with the highest snowfall is January (0.2").
Months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").

[Resources]

Average snowfall days in September
Jack, AL

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

Months with the highest number of snowfall days are January and February (0.3 days).
Months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).

[Resources]

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

Average daylight in September / Average sunshine in September - Jack, AL
  • Average daylight in September: 12.3h

The month with the longest days is June (Average daylight: 14.2h).
The month with the shortest days is December (Average daylight: 10.1h).

  • Average sunshine in September: 8.8h

The month with the most sunshine is June (Average sunshine: 10.8h).
The month with the least sunshine is December (Average sunshine: 5.2h).

[Resources]

Average sunshine days in September
Jack, AL

Average sunshine days in September - Jack, AL
  • Average sunshine days in September: 12.7 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is August (7.3 days).

[Resources]

Average UV index in September
Jack, AL

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

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

[Resources]

Average cloud cover in September
Jack, AL

Average cloud cover in September - Jack, AL
  • Average cloud cover in September: 31

The month with the most cloud cover is December (Cloud cover 44).
The month with the least cloud cover is October (Cloud cover 27).

[Resources]

Average visibility in September
Jack, AL

Average visibility in September - Jack, 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).

[Resources]