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 transition into September reveals an average high-temperature of a moderately hot 85.3°F (29.6°C), mirroring a close resemblance to August. In Knoxville, an average low-temperature of 67.8°F (19.9°C) is recorded during September nights.Heat index
The average heat index in September is appraised at a torrid 95°F (35°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.In terms of the heat index, values are set with light wind and shade conditions in mind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'feels like' or 'real feel', shows a temperature sensation when both heat and moisture conditions are combined. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. One should be aware that direct sunshine can amplify the perceived temperature, raising the heat index by as much as 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Children often overlook the need for breaks and fluid intake. Thirst is a late-stage sign of dehydration - hence, it is necessary to stay hydrated, especially during extended periods of physical activities.
Perspiring is a crucial mechanism for the human body, allowing it to release excessive warmth through evaporating sweat. With high air temperature and humidity (high heat index) conditions, sweat production is restricted, leading to an amplified perception of heat. When heat gain surpasses the level the body can shed, body temperature begins to increase, and consequently, overheating and dehydration can occur, with varying severity.
Humidity
In Knoxville, the average relative humidity in September is 73%.Rainfall
The month with the least rainfall is September, when the rain falls for 10 days and typically collects 0.71" (18mm) of precipitation.Snowfall
January, March through December 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 7:11 am and sunset at 8:00 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:21 pm EDT.
Sunshine
In Knoxville, Georgia, the average sunshine in September is 8.6h.UV index
In Knoxville, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for ordinary individuals.Note: The daily high UV index of 6 during September translates into the following recommendations:
Stay clear of intense sun exposure. Solar protection is of utmost significance. To the best of your ability, limit your exposure to the sun between the hours of 10 a.m. and 4 p.m., when UV radiation is at its peak. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September in Knoxville?
When it does not snow?
How many hours of daylight does Knoxville have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September in Knoxville?
What is the UV index intensity in September?
Average temperature in September
Knoxville, GA
- Average high temperature in September: 85.3°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (55°F).
- Average low temperature in September: 67.8°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (38.8°F).
Average pressure in September
Knoxville, GA
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Knoxville, GA
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
Knoxville, GA
- Average humidity in September: 73%
The month with the highest relative humidity is December (75%).
The months with the lowest relative humidity are January, October and November (70%).
Average rainfall in September
Knoxville, GA
- Average rainfall in September: 0.71"
The wettest month (with the highest rainfall) is August (1.77").
The driest month (with the least rainfall) is September (0.71").
Average rainfall days in September
Knoxville, GA
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is August (17.2 days).
The month with the least rainy days is November (5.5 days).
Average snowfall in September
Knoxville, GA
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.04").
The months with the least snowfall are January, March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Knoxville, GA
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.2 days).
The months with the least snowfall days are January, April, May, June, July, August, September, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
Knoxville, 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 4min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 12min).
Average sunshine days in September
Knoxville, GA
- Average sunshine days in September: 17.4 days
The month with the most sunshine days is October (23.3 days).
The month with the least sunshine days is August (10.6 days).
Average UV index in September
Knoxville, GA
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January and December (UV index 3).
Average cloud cover in September
Knoxville, GA
- Average cloud cover in September: 31
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
Knoxville, 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).
Knoxville, Georgia, USA
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