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
Winchester's weather in September, with an average high-temperature of a still moderately hot 80.6°F (27°C), subtly shifts from August's 85.8°F (29.9°C). In Winchester, the nighttime temperature averages to an enjoyable 60.8°F (16°C) during September.Heat index
In September, the average heat index is computed to be 84.2°F (29°C). If one persists in activity during exposure, it could induce weariness and subsequently, heat cramps.When referencing the heat index, its values are suitable for shady environments and light breezes. Direct sunshine exposure could raise heat index values by as much as 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. An individual's perception of weather can be influenced by a variety of factors including metabolic differences, being pregnant, and their degree of physical exertion. Recognize that direct exposure to the sun can escalate the heat effect, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are extremely vital to babies and toddlers. Young kids are often more at risk than adults as they tend to perspire less. Besides, their skin surface is larger relative to their small bodies, and their increased heat output from their active lifestyle compounds their risk.
Humidity
The average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall in Winchester, Tennessee. Rain falls for 13.2 days and accumulates 2.05" (52mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Winchester is 12h and 23min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:10 pm. On the last day of September, in Winchester, sunrise is at 6:39 am and sunset at 6:29 pm CDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Winchester, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Winchester?
What is the average humidity in September in Winchester?
What is the driest month in Winchester?
How many days does it rain in September in Winchester?
When it does not snow in Winchester?
What is the average length of the day in September in Winchester?
What time are sunrise and sunset in September in Winchester?
How long on average sun shines in September in Winchester?
How high is the UV index in September in Winchester?
Average temperature in September
Winchester, TN
- Average high temperature in September: 80.6°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (45.3°F).
- Average low temperature in September: 60.8°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).
Average pressure in September
Winchester, TN
- 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
Winchester, TN
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (4.3mph).
Average humidity in September
Winchester, TN
- Average humidity in September: 77%
The month with the highest relative humidity is December (81%).
The months with the lowest relative humidity are October and November (75%).
Average rainfall in September
Winchester, TN
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is February (4.17").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in September
Winchester, TN
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (20.7 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Winchester, TN
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.67").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Winchester, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.2 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
Winchester, 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 2min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).
Average sunshine days in September
Winchester, TN
- Average sunshine days in September: 14.9 days
The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is July (8.8 days).
Average UV index in September
Winchester, 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 and December (UV index 2).
Average cloud cover in September
Winchester, TN
- Average cloud cover in September: 32
The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is June (Cloud cover 31).
Average visibility in September
Winchester, TN
- Average visibility in September: 6mi
The months with the highest visibility are February, April, June, September, October, November and December (6mi).
The months with the lowest visibility are January, March, May, July and August (5mi).
Winchester, Tennessee, USA
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