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 weather during September records an average high-temperature of a still hot 88.7°F (31.5°C), closely mirroring the preceding month. During the nights in September, Roundhill experiences a consistent average temperature of 67.3°F (19.6°C).Heat index
For September, the heat index is evaluated at a scorching 104°F (40°C). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Understand that the heat index values take into account shaded locations and mild winds. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', embodies the combination of air temperature and moisture content to illustrate perceived heat. This effect is personal, shaped by the individual's physical activity and heat sensitivity, influenced by factors including wind, clothing, and metabolic variances. Direct exposure to the sun's rays can enhance the felt temperature, increasing the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Youngsters generally face more threats than adults given their lesser ability to sweat. Coupled with their larger skin surface relative to their small bodies and higher heat production due to their activities, they are more endangered.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. If the body retains more heat than it can expel, the increasing temperature can lead to heat-related conditions.
Humidity
In September, the average relative humidity in Roundhill is 73%.Rainfall
In Roundhill, in September, it is raining for 12.3 days, with typically 2.09" (53mm) of accumulated precipitation. In Roundhill, during the entire year, the rain falls for 158.7 days and collects up to 33.23" (844mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Roundhill, the average length of the day in September is 12h and 21min.On the first day of September, sunrise is at 6:26 am and sunset at 7:14 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:36 pm CDT.
Sunshine
In Roundhill, the average sunshine in September is 8.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 5 transforms into these recommendations:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Roundhill have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Roundhill have in September?
What is the UV index intensity in September?
Average temperature in September
Roundhill, AL
- Average high temperature in September: 88.7°F
The warmest months (with the highest average high temperature) are July and August (92.8°F).
The month with the lowest average high temperature is January (55.9°F).
- Average low temperature in September: 67.3°F
The month with the highest average low temperature is July (72.3°F).
The coldest month (with the lowest average low temperature) is January (38.7°F).
Average pressure in September
Roundhill, AL
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Roundhill, AL
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is April (6.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in September
Roundhill, AL
- Average humidity in September: 73%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (70%).
Average rainfall in September
Roundhill, AL
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (1.85").
Average rainfall days in September
Roundhill, AL
- Average rainfall days in September: 12.3 days
The month with the highest number of rainy days is July (20.5 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in September
Roundhill, AL
- Average snowfall in September: 0"
The months with the highest snowfall are January and December (0.35").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Roundhill, AL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.8 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
Roundhill, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 12min).
The month with the shortest days is December (Average daylight: 10h and 6min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).
Average sunshine days in September
Roundhill, AL
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is July (9.1 days).
Average UV index in September
Roundhill, AL
- Average UV index in September: 5
The months with the highest UV index are 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
Roundhill, AL
- Average cloud cover in September: 34
The month with the most cloud cover is December (Cloud cover 51).
The month with the least cloud cover is October (Cloud cover 33).
Average visibility in September
Roundhill, AL
- Average visibility in September: 5mi
The months with the highest visibility are April, June, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September and December (5mi).
Roundhill, Alabama, USA
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