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
September signifies a gentle decline in Knox Park's average high-temperature, easing from a hot 86.9°F (30.5°C) in August to a warm 81.3°F (27.4°C). During September, Knox Park experiences a consistent low-temperature average of 59.9°F (15.5°C).Heat index
In September, the average heat index is evaluated at a hot 86°F (30°C). Constant activity during exposure could result in a state of weariness and possibly heat cramps.Regarding the heat index, one should be aware it's determined by shaded settings and mild winds. Being under direct sunlight might amplify the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is a measure that combines air temperature and relative humidity into a single value that indicates how hot the weather feels. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children frequently underestimate the necessity to rest and hydrate. Thirst is a late sign of dehydration - thus, it is vital to stay hydrated, particularly during lengthy physical exercises.
Humidity
The months with the lowest humidity in Knox Park are June through November, with an average relative humidity of 75%.Rainfall
September is the month with the least rainfall. Rain falls for 8.7 days and accumulates 0.79" (20mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:11 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:32 am and sunset at 7:23 pm EDT.
Sunshine
In Knox Park, the average sunshine in September is 8.6h.UV index
In Knox Park, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum UV index of 5 in September translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Knox Park in September?
What are the least humid months?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September in Knox Park?
When it does not snow?
How many hours of daylight does Knox Park have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Knox Park, TN
- Average high temperature in September: 81.3°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (46°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (65.8°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Knox Park, TN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Knox Park, TN
- Average wind speed in September: 4.3mph
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 (4mph).
Average humidity in September
Knox Park, TN
- Average humidity in September: 75%
The month with the highest relative humidity is December (79%).
The months with the lowest relative humidity are June, July, August, September, October and November (75%).
Average rainfall in September
Knox Park, TN
- Average rainfall in September: 0.79"
The wettest month (with the highest rainfall) is July (2.09").
The driest month (with the least rainfall) is September (0.79").
Average rainfall days in September
Knox Park, TN
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is July (13.5 days).
The month with the least rainy days is November (6.7 days).
Average snowfall in September
Knox Park, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Knox Park, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.5 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
Knox Park, TN
- 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 48min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Knox Park, TN
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is October (22.3 days).
The month with the least sunshine days is July (15.3 days).
Average UV index in September
Knox Park, TN
- 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, February and December (UV index 2).
Average cloud cover in September
Knox Park, TN
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Knox Park, TN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Knox Park, Tennessee, USA
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