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 initiation of September sees an average high-temperature of a moderately hot 85.5°F (29.7°C), showing minor variations from the previous month. During September nights, Louisville records an average temperature of 67.1°F (19.5°C).Heat index
In September, the heat index is estimated at a very hot 95°F (35°C). Preventive measures are required to mitigate the risk of heat cramps and heat exhaustion. Continuous activity may precipitate heatstroke.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is what the temperature feels like to the human body when the air temperature is combined with the relative humidity. Depending on the activity and the individual's heat perception, which may vary due to factors including wind, clothing, and metabolic variations, this effect remains subjective. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
When temperatures rise, the human body turns to perspiration, using the cooling power of evaporating sweat. When the air contains significant moisture, the efficiency of the evaporation process decreases, preventing the body from cooling down effectively and creating a feeling of overheating. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.
Humidity
In September, the average relative humidity is 73%.Rainfall
In September, the rain falls for 13.9 days. Throughout September, 2.13" (54mm) of precipitation is accumulated. In Louisville, during the entire year, the rain falls for 165.9 days and collects up to 32.83" (834mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 7:04 am and sunset at 7:54 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:15 pm EDT.
Sunshine
In Louisville, the average sunshine in September is 8.5h.UV index
In Louisville, the average daily maximum UV index in September is 6. A UV Index value of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum UV index of 6 in September translates into the following recommendations:
Persist with precautions and heed sun safety advice. Prevention of sunburn is compulsory. Stay out of direct sunlight between 10 a.m. and 4 p.m., when UV radiation is most intense, and remember that not all shade structures provide complete protection. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot during September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Louisville?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Louisville, GA
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (54.5°F).
- Average low temperature in September: 67.1°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.5°F).
Average pressure in September
Louisville, GA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Louisville, GA
- Average wind speed in September: 6.3mph
The windiest months (with the highest average wind speed) are January, February, March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Louisville, GA
- Average humidity in September: 73%
The month with the highest relative humidity is December (76%).
The months with the lowest relative humidity are January, October and November (71%).
Average rainfall in September
Louisville, GA
- Average rainfall in September: 2.13"
The wettest month (with the highest rainfall) is August (3.74").
The driest month (with the least rainfall) is October (2.01").
Average rainfall days in September
Louisville, GA
- Average rainfall days in September: 13.9 days
The month with the highest number of rainy days is August (20.3 days).
The months with the least rainy days are October and November (8.5 days).
Average snowfall in September
Louisville, GA
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.24").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Louisville, GA
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (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
Louisville, GA
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 18min).
The month with the shortest days is December (Average daylight: 10h and 0min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).
Average sunshine days in September
Louisville, GA
- Average sunshine days in September: 14.5 days
The months with the most sunshine days are October and November (20.5 days).
The months with the least sunshine days are July and August (9 days).
Average UV index in September
Louisville, GA
- Average UV index in September: 6
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
Louisville, GA
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 43).
The month with the least cloud cover is October (Cloud cover 28).
Average visibility in September
Louisville, GA
- 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).
Louisville, Georgia, USA
Weather forecast for your location
2. Allow the app to use your location