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 advent of September brings a slight shift in average high-temperature, moving from a tropical 86.4°F (30.2°C) in August to a moderately hot 81°F (27.2°C). Flat Rock's temperature lowers to a mean of 61.3°F (16.3°C) during the nights in September.Heat index
During September, the heat index is estimated at a hot 86°F (30°C). Prolonged activity during exposure might result in a state of fatigue and cause heat cramps.Thinking about the heat index, one should account for its values in shaded areas with gentle breezes. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly meaningful for babies and toddlers. Children frequently do not comprehend the need for rest and hydration. Thirst is an advanced stage of dehydration - staying hydrated, especially during extended physical exercises, is essential.
Humidity
In Flat Rock, the average relative humidity in September is 77%.Rainfall
In Flat Rock, in September, during 15.4 rainfall days, 3.11" (79mm) of precipitation is typically accumulated. Throughout the year, there are 191.1 rainfall days, and 48.94" (1243mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Flat Rock.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, in Flat Rock, Alabama, sunrise is at 6:37 am and sunset at 6:27 pm CDT.
Sunshine
In Flat Rock, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September in Flat Rock is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 5 in September translates into this advice:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. When the Sun is at its strongest around midday, find shade and limit exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Frequently asked questions
What is the temperature in September in Flat Rock?
What is the average humidity in September in Flat Rock?
How many days does it rain in September in Flat Rock?
When it does not snow in Flat Rock?
What is the average length of the day in September in Flat Rock?
What time are sunrise and sunset in September in Flat Rock?
How long on average sun shines in September in Flat Rock?
How high is the UV index in September in Flat Rock?
Average temperature in September
Flat Rock, AL
- Average high temperature in September: 81°F
The warmest month (with the highest average high temperature) is July (87.4°F).
The month with the lowest average high temperature is January (46.8°F).
- Average low temperature in September: 61.3°F
The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (31.8°F).
Average pressure in September
Flat Rock, 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
Flat Rock, AL
- Average wind speed in September: 4.6mph
The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).
Average humidity in September
Flat Rock, AL
- Average humidity in September: 77%
The month with the highest relative humidity is December (81%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Flat Rock, AL
- Average rainfall in September: 3.11"
The wettest month (with the highest rainfall) is July (5.24").
The driest month (with the least rainfall) is November (2.76").
Average rainfall days in September
Flat Rock, AL
- Average rainfall days in September: 15.4 days
The month with the highest number of rainy days is July (22.4 days).
The month with the least rainy days is November (10.3 days).
Average snowfall in September
Flat Rock, AL
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.02").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Flat Rock, AL
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Flat Rock, AL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Flat Rock, AL
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is October (18.3 days).
The month with the least sunshine days is July (7 days).
Average UV index in September
Flat Rock, 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
Flat Rock, AL
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 51).
The months with the least cloud cover are June and September (Cloud cover 32).
Average visibility in September
Flat Rock, 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).
Flat Rock, Alabama, USA
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