September weather forecast and climate
Stems, AL

Weather in September

September, the first month of the autumn, in Stems, is still a warm month, with average temperature fluctuating between 85.5°F (29.7°C) and 65.7°F (18.7°C).

Temperature

In September, the average high-temperature is almost the same as in August - a warm 85.5°F (29.7°C). The average low-temperature, in September, is 65.7°F (18.7°C).

Heat index

The average heat index is calculated to a very hot 95°F (35°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Note that heat index values are valued for light wind and location in the shade. 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 'apparent temperature', 'feels like', '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. This effect is individual, with diverse people perceiving weather differently for numerous reasons (differences in body mass, height, and shape, pregnancy, metabolic differences), and activity. 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 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.
The human body normally cools itself by perspiration, as evaporated sweat carries heat away from the body. When the relative humidity is high, the evaporation rate is reduced. The warmth is removed from the body at a lower rate, causing the body to retain more heat than it would in dry air. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 99.5°F (37.5°C) to 100.9°F (38.3°C), thermal conditions are potentially life-threatening.

Humidity

The average relative humidity in Stems is 73%.

Rainfall

September and October are months with the least rain in Stems when the rain falls for 11.9 days and typically aggregates up to 1.26" (32mm) of rain.

Snowfall

In Stems snow does not fall in March through November.

Daylight

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

Sunshine

In Stems, Alabama, the average sunshine is 9h.

UV index

In Stems, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to the Sun's UV rays for average individuals.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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.
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FAQ

What is the temperature in September in Stems?

In September, the average high-temperature is 85.5°F (29.7°C), and the average low-temperature is 65.7°F (18.7°C). In September, the average heat index (a.k.a. 'feels like', 'apparent temperature'), that factores the actual air temperature with the relative humidity, is estimated at 95°F (35°C).

What is the average humidity in September in Stems?

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

How much does it rain in Stems in September?

In Stems, Alabama, during September, the rain falls for 11.9 days and regularly aggregates up to 1.26" (32mm) of precipitation.

What is the driest month in Stems?

Months with the least rainfall in Stems are September and October Rain falls for 11.9 days and accumulates 1.26" (32mm) of rain.

When it does not snow in Stems?

In Stems snow does not fall in March through November.

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

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

How many hours of sunshine does Stems have in September?

In September, the average sunshine in Stems, Alabama, is 9h.

How high is the UV index in September in Stems?

In September, the average daily maximum UV index in Stems is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in September
Stems, AL

Average temperature in September - Stems, AL
  • Average high temperature in September: 85.5°F

The warmest month (with the highest average high temperature) is July (90.3°F).
The month with the lowest average high temperature is January (51.4°F).

  • Average low temperature in September: 65.7°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (36.3°F).

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Average pressure in September
Stems, AL

Average pressure in September - Stems, 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
Stems, AL

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

The windiest months (with the highest average wind speed) are January, February and March (7.3mph).
The calmest months (with the lowest average wind speed) are July and August (4.4mph).

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Average humidity in September
Stems, AL

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

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
Stems, AL

Average rainfall in September - Stems, AL
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is August (2.52").
The driest months (with the least rainfall) are September and October (1.26").

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Average rainfall days in September
Stems, AL

Average rainfall days in September - Stems, AL
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is November (6.7 days).

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Average snowfall in September
Stems, AL

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

The month with the highest snowfall is December (0.47").
Months with the least snowfall are March, April, May, June, July, August, September, October and November (0").

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Average snowfall days in September
Stems, AL

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

The month with the highest number of snowfall days is January (1 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
Stems, AL

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

Months with the most sunshine are June and July (Average sunshine: 10.6h).
Months with the least sunshine are February and December (Average sunshine: 4.9).

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Average sunshine days in September
Stems, AL

Average sunshine days in September - Stems, AL
  • Average sunshine days in September: 15.5 days

The month with the most sunshine days is November (21.9 days).
The month with the least sunshine days is July (9 days).

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Average UV index in September
Stems, AL

Average UV index in September - Stems, AL
  • Average UV index in September: 5

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

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Average cloud cover in September
Stems, AL

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

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is September (Cloud cover 29).

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Average visibility in September
Stems, AL

Average visibility in September - Stems, 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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