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 shift into September records an average high-temperature of a still hot 88.2°F (31.2°C), subtly varied from August's 91.6°F (33.1°C). Mount Vernon temperatures generally rest at a low of 70.7°F (21.5°C) during the September nights.Heat index
In September, the heat index is evaluated at a blistering 104°F (40°C). Emphasize additional safety, risk of heat cramps and heat exhaustion is high. Continuous activity might result in heatstroke.The metrics for the heat index are tailored for both shady environments and light winds. Exposure to the direct sun could elevate the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a measure of how hot it feels when the actual air humidity is factored in. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical for babies and toddlers. 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.
For the human body, perspiration is the go-to method to regulate temperature, using sweat's evaporation to dissipate warmth. An elevated level of relative humidity hinders evaporation, leading to decreased heat elimination from the body, inducing a sensation of excess heat. The body is at risk of dehydration and related complications when it fails to shed excessive heat.
Humidity
The average relative humidity in September in Mount Vernon is 75%.Rainfall
In Mount Vernon, in September, during 15.3 rainfall days, 2.48" (63mm) of precipitation is typically accumulated. In Mount Vernon, during the entire year, the rain falls for 156.2 days and collects up to 33.35" (847mm) of precipitation.Snowfall
In Mount Vernon, snow does not fall in March through December.Daylight
In Mount Vernon, Alabama, the average length of the day in September is 12h and 20min.On the first day of September, sunrise is at 6:28 am and sunset at 7:15 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:38 pm CDT.
Sunshine
In September, the average sunshine is 9.4h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Enforce precautions and stick to sun safety measures. Preservation from skin and eye damage is essential. Make an effort to avoid direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation, and note that objects like parasols or canopies might not offer full sun protection. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Frequently asked questions
Is it hot in Mount Vernon during September?
What is the average humidity in September in Mount Vernon?
How many days does it rain in September in Mount Vernon?
When it does not snow in Mount Vernon?
How many hours of daylight does Mount Vernon have in September?
When are sunrise and sunset in September in Mount Vernon?
How many hours of sunshine does Mount Vernon have in September?
What is the UV index reading in September in Mount Vernon?
Average temperature in September
Mount Vernon, AL
- Average high temperature in September: 88.2°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (58.5°F).
- Average low temperature in September: 70.7°F
The month with the highest average low temperature is August (75°F).
The coldest month (with the lowest average low temperature) is January (41.9°F).
Average pressure in September
Mount Vernon, 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
Mount Vernon, AL
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in September
Mount Vernon, AL
- Average humidity in September: 75%
The month with the highest relative humidity is December (80%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Mount Vernon, AL
- Average rainfall in September: 2.48"
The wettest months (with the highest rainfall) are July and August (4.57").
The driest month (with the least rainfall) is November (1.65").
Average rainfall days in September
Mount Vernon, AL
- Average rainfall days in September: 15.3 days
The month with the highest number of rainy days is July (22.8 days).
The month with the least rainy days is November (6.6 days).
Average snowfall in September
Mount Vernon, AL
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.2").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Mount Vernon, 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 April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Mount Vernon, 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 12min).
Average sunshine days in September
Mount Vernon, AL
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (6.1 days).
Average UV index in September
Mount Vernon, 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
Mount Vernon, 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 25).
Average visibility in September
Mount Vernon, AL
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are February and December (5mi).
Mount Vernon, Alabama, USA
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