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
With the onset of September, the average high-temperature stands at a still hot 87.8°F (31°C), closely aligned with August's 91.4°F (33°C). Stapleton experiences a steady low-temperature of 70.2°F (21.2°C) throughout September.Heat index
In September, the heat index is appraised at a blisteringly hot 104°F (40°C). Adopt extra preventive measures, the occurrence of heat cramps and heat exhaustion is likely. Heatstroke may follow extended activity.Be aware that heat index ratings are designed for shaded locations and minor breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. The effect is personal, with varied weather perceptions among individuals due to differences in body mass, stature, and physical activity. Considering the impact of direct sunlight, it's possible for the heat index to surge by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular significance for children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
In high temperatures, perspiration kicks in, allowing the human body to cool down through the evaporation of sweat. With excessive moisture in the atmosphere, the effectiveness of the evaporation process is decreased, causing the body to cool down less efficiently, leading to a sensation of overheating. When the body is unable to balance heat gain, its temperature elevates, which may induce thermal illnesses.
Humidity
In September, the average relative humidity in Stapleton is 76%.Rainfall
In Stapleton, in September, during 17.3 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 165.8 rainfall days, and 26.5" (673mm) of precipitation is accumulated.Snowfall
In Stapleton, snow does not fall in February through December.Daylight
The average length of the day in September in Stapleton is 12h and 20min.On the first day of September, sunrise is at 6:28 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:37 pm CDT.
Sunshine
The average sunshine in September is 9.4h.UV index
In September, the average daily maximum UV index in Stapleton is 6. A UV Index reading of 6 to 7 represents a high health vulnerability from exposure to the Sun's UV rays for average individuals.Note: The maximum daily UV index, 6 in September, converts into the following recommendations:
Inhibit overexposure. Warding off sun damage is of utmost importance. 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. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Frequently asked questions
How hot is it in Stapleton in September?
What is the average humidity in September in Stapleton?
How much does it rain in Stapleton in September?
When it does not snow in Stapleton?
What is the average length of the day in September in Stapleton?
When is the sunrise / sunset in September in Stapleton?
How many hours of sunshine does Stapleton have in September?
What is the UV index intensity in September in Stapleton?
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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