Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition into September shows a subtle variation to a still hot 87.8°F (31°C) from August's 91.4°F (33°C) in the average high-temperature. The average temperature in Stapleton drops to a pleasant 70.2°F (21.2°C) during the night in the month of September.Heat index
September's mean heat index is evaluated at a blistering 104°F (40°C). Take extra precautions, as heat cramps and heat exhaustion are possible. Sustained activity may result in heatstroke.Evaluating the heat index requires understanding its values in the shade and with gentle winds. The heat index values could be amplified by up to 15 Fahrenheit (8 Celsius) degrees in direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. When you're directly under the sun's rays, remember that the heat index may surge by 15 Fahrenheit (8 Celsius) degrees. Heat index values are essentially critical for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
Perspiring is the body's way of cooling down, particularly by allowing sweat to evaporate and take the heat with it. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.
Humidity
In September, the average relative humidity is 76%.Rainfall
In Stapleton, in September, it is raining for 17.3 days, with typically 2.05" (52mm) of accumulated precipitation. Throughout the year, there are 165.8 rainfall days, and 26.5" (673mm) of precipitation is accumulated.Snowfall
February through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 20min.On the first day of the month, sunrise is at 6:28 am and sunset at 7:13 pm. On the last day of September, in Stapleton, sunrise is at 6:44 am and sunset at 6:37 pm CDT.
Sunshine
The average sunshine in September is 9.4h.UV index
The average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 6 in September leads to these recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. Limit direct sun exposure and seek shade between 10 a.m. and 4 p.m., the time of the most intense UV radiation, noting that shade structures may not provide total sun protection. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Stapleton have in September?
What is the UV index intensity in September?
Average temperature in September
Stapleton, AL
- Average high temperature in September: 87.8°F
The warmest months (with the highest average high temperature) are July and August (91.4°F).
The month with the lowest average high temperature is January (58.3°F).
- Average low temperature in September: 70.2°F
The months with the highest average low temperature are July and August (74.1°F).
The coldest month (with the lowest average low temperature) is January (41.9°F).
Average pressure in September
Stapleton, AL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The months with the lowest atmospheric pressure are June and August (29.97"Hg).
Average wind speed in September
Stapleton, AL
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (6.4mph).
The calmest month (with the lowest average wind speed) is July (4.3mph).
Average humidity in September
Stapleton, AL
- Average humidity in September: 76%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Stapleton, AL
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is August (3.5").
The driest month (with the least rainfall) is February (1.42").
Average rainfall days in September
Stapleton, AL
- Average rainfall days in September: 17.3 days
The month with the highest number of rainy days is July (23.8 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in September
Stapleton, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.04").
The months with the least snowfall are February, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Stapleton, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.3 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Stapleton, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 6min).
The month with the shortest days is December (Average daylight: 10h and 12min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Stapleton, AL
- Average sunshine days in September: 11 days
The month with the most sunshine days is November (20.7 days).
The month with the least sunshine days is July (5.1 days).
Average UV index in September
Stapleton, AL
- Average UV index in September: 6
The months with the highest UV index are May, June, July and August (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Stapleton, AL
- Average cloud cover in September: 28
The month with the most cloud cover is December (Cloud cover 46).
The month with the least cloud cover is October (Cloud cover 26).
Average visibility in September
Stapleton, AL
- Average visibility in September: 6mi
The months with the highest visibility are January, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are February, March, April and December (5mi).
Stapleton, Alabama, USA
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