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 arrival of September is marked by an average high-temperature of a moderately hot 85.6°F (29.8°C), bearing a close resemblance to August. Vernon observes an average nighttime low-temperature of 65.5°F (18.6°C) during the month of September.Heat index
The heat index in September is evaluated at a torrid 95°F (35°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. It is noteworthy to mention that direct sunlight exposure can augment the felt temperature, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. Typically, children face more danger than adults as they usually perspire less. Their larger skin surface relative to their small bodies and increased heat output from their activities enhance their risk.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. The body faces dehydration threats when its cooling efforts are outpaced by excessive heat gain.
Humidity
September and October, with an average relative humidity of 72%, are the least humid months.Rainfall
September is the month with the least rainfall. Rain falls for 11.9 days and accumulates 2.4" (61mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Vernon, the average length of the day in September is 12h and 22min.On the first day of September, sunrise is at 6:26 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:37 pm CDT.
Sunshine
In September, the average sunshine in Vernon is 9.3h.UV index
In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. Solar radiation is at its peak intensity during midday, so it's advisable to stay indoors or in the shade. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What are the least humid months?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow in Vernon?
How many hours of daylight does Vernon have in September?
What time are sunrise and sunset in September in Vernon?
How many hours of sunshine does Vernon have in September?
What is the UV index reading in September?
Average temperature in September
Vernon, AL
- Average high temperature in September: 85.6°F
The warmest months (with the highest average high temperature) are July and August (91°F).
The month with the lowest average high temperature is January (50.5°F).
- Average low temperature in September: 65.5°F
The month with the highest average low temperature is July (71.1°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).
Average pressure in September
Vernon, AL
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Vernon, AL
- Average wind speed in September: 5.2mph
The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest month (with the lowest average wind speed) is July (4.6mph).
Average humidity in September
Vernon, AL
- Average humidity in September: 72%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are September and October (72%).
Average rainfall in September
Vernon, AL
- Average rainfall in September: 2.4"
The wettest months (with the highest rainfall) are February and April (4.33").
The driest month (with the least rainfall) is September (2.4").
Average rainfall days in September
Vernon, AL
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is November (9.1 days).
Average snowfall in September
Vernon, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Vernon, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 days).
The 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
Vernon, 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: 10h and 0min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Vernon, AL
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is October (20 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in September
Vernon, AL
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Vernon, AL
- Average cloud cover in September: 28
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is September (Cloud cover 28).
Average visibility in September
Vernon, AL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Vernon, Alabama, USA
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