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
September witnesses a gentle descent in average high-temperature, descending from August's tropical 87.4°F (30.8°C) to a moderately hot 81.9°F (27.7°C). September nights experience a consistent temperature drop to a refreshing 61.3°F (16.3°C).Heat index
The average heat index in September is computed to be a hot 87.8°F (31°C). If exposure and activity are sustained, they might cause a feeling of weariness, resulting in heat cramps.Heat index data is primarily for areas with shade and subjected to light winds. The heat index can potentially augment by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Direct exposure to sun rays can potentially augment the heat sensation, elevating the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely vital to babies and toddlers. Young ones are generally more prone to risk than adults due to their reduced ability to sweat. Their large skin surface area relative to their diminutive bodies and elevated heat production from their activities further enhance this risk.
Humidity
The average relative humidity in September is 76%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.2 days and typically collects 1.85" (47mm) of precipitation.Snowfall
In Valley Head, snow does not fall in May through October.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:08 pm. On the last day of September, sunrise is at 6:36 am and sunset at 6:27 pm CDT.
Sunshine
The average sunshine in September is 8.5h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, the UV index of 5 transforms into the following advice:
Be vigilant - A duty to shield skin and eyes from injury exists. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September in Valley Head?
What is the driest month?
How much does it rain in September?
When it does not snow?
What is the average length of the day in September in Valley Head?
When is the sunrise / sunset in September in Valley Head?
How many hours of sunshine does Valley Head have in September?
What is the UV index intensity in September?
Average temperature in September
Valley Head, AL
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (47.1°F).
- Average low temperature in September: 61.3°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (32.2°F).
Average pressure in September
Valley Head, AL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Valley Head, AL
- Average wind speed in September: 4.2mph
The windiest month (with the highest average wind speed) is February (6.9mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Valley Head, AL
- Average humidity in September: 76%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Valley Head, AL
- Average rainfall in September: 1.85"
The wettest month (with the highest rainfall) is July (3.31").
The driest month (with the least rainfall) is September (1.85").
Average rainfall days in September
Valley Head, AL
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in September
Valley Head, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Valley Head, AL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Valley Head, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 3min
The months with the most sunshine are June and July (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 5h and 0min).
Average sunshine days in September
Valley Head, AL
- Average sunshine days in September: 16 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is July (10.1 days).
Average UV index in September
Valley Head, AL
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Valley Head, AL
- Average cloud cover in September: 31
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Valley Head, AL
- Average visibility in September: 5mi
The months with the highest visibility are June, July, October and November (6mi).
The months with the lowest visibility are January, February, March, April, May, August, September and December (5mi).
Valley Head, Alabama, USA
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