September weather forecast and climate
Alabaster, AL

The first month of the autumn, September, is still a warm month in Alabaster, Alabama, with temperature in the range of an average low of 65.7°F (18.7°C) and an average high of 85.5°F (29.7°C).

Temperature

In September, the average high-temperature is relatively 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 evaluated at a very hot 95°F (35°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.
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 'feels like', 'real feel', 'felt air temperature', or 'apparent temperature', 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 (metabolic differences, pregnancy, differences in body mass, height, and shape). 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. 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. Under high air temperature and humidity (high heat index) conditions, perspiration is limited, and the perception of heat is increased. When heat gain exceeds the level the body can remove, body temperature begins to rise, and heat-related illnesses and disorders may develop.

Humidity

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

Rainfall

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

Snowfall

In Alabaster snow does not fall in March through November.

Daylight

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

Sunshine

The average sunshine in Alabaster is 9h.

UV index

In September, the average daily maximum UV index in Alabaster is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: The average daily UV index of 5 transform into the following instructions:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.

What is the temperature in September in Alabaster?

The average high-temperature, in September, is 85.5°F (29.7°C), while the average low-temperature is 65.7°F (18.7°C). In September, the average heat index (a.k.a. 'apparent temperature', 'feels like'), that combines both air temperature and relative humidity, is calculated to 95°F (35°C).

What is the average humidity in September in Alabaster?

The average relative humidity in September in Alabaster is 73%.

How much does it rain in Alabaster in September?

In Alabaster, in September, it is raining for 11.9 days, with typically 1.26" (32mm) of accumulated precipitation.

What is the driest month in Alabaster?

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

When it does not snow in Alabaster?

March through November are months without snowfall.

How many hours of daylight does Alabaster have in September?

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

How many hours of sunshine does Alabaster have in September?

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

What is the UV index reading in September in Alabaster?

In September, the average daily maximum UV index in Alabaster, Alabama, is 5. A UV Index of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV radiation.
Average temperature in September - Alabaster, 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).

Average pressure in September - Alabaster, 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").

Average wind speed in September - Alabaster, 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).

Average humidity in September - Alabaster, 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%).

Average rainfall in September - Alabaster, 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").

Average rainfall days in September - Alabaster, 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).

Average snowfall in September - Alabaster, 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").

Average snowfall days in September - Alabaster, 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).

Average daylight in September / Average sunshine in September - Alabaster, 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).

Average sunshine days in September - Alabaster, 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).

Average UV index in September - Alabaster, 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).

Average cloud cover in September - Alabaster, 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).

Average visibility in September - Alabaster, 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).