September weather forecastOld Middleton, TN
September
Weather in September
The first month of the autumn, September, is still a warm month in Old Middleton, Tennessee, with temperature in the range of an average low of 60.6°F (15.9°C) and an average high of 80.6°F (27°C).Temperature
In September, the average high-temperature marginally decreases from a hot 86°F (30°C) in August to a moderately hot 80.6°F (27°C). During the month of September, the temperature generally drops to a low average of 60.6°F (15.9°C).Heat index
In September, the average heat index is evaluated at 84.2°F (29°C). When exposure and activity are sustained, they could induce fatigue, with a chance of heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. Heat index values may rise by up to 15 Fahrenheit (8 Celsius) degrees when exposed to direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', is derived by integrating air temperature with the existing relative humidity to express the perceived warmth. One's perception of weather can be shaped by other factors, involving metabolic differences, pregnancy, and physical exertion. When directly under the sun, the weather's impact can intensify, possibly boosting the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
Humidity
The average relative humidity in September is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 14 days and typically collects 2.32" (59mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In Old Middleton, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:11 pm. On the last day of September, sunrise is at 6:38 am and sunset at 6:28 pm CDT.
Sunshine
In Old Middleton, the average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September in Old Middleton is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: The maximum daily UV index of 5 in September converts into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Old Middleton, TN
- Average high temperature in September: 80.6°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (43.7°F).
- Average low temperature in September: 60.6°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (29.8°F).
Average pressure in September
Old Middleton, 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 (29.97"Hg).
Average wind speed in September
Old Middleton, TN
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is February (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Old Middleton, TN
- Average humidity in September: 77%
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are October and November (76%).
Average rainfall in September
Old Middleton, TN
- Average rainfall in September: 2.32"
The wettest months (with the highest rainfall) are February and July (4.17").
The driest month (with the least rainfall) is September (2.32").
Average rainfall days in September
Old Middleton, TN
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (10.5 days).
Average snowfall in September
Old Middleton, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.34").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Old Middleton, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.5 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
Old Middleton, TN
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 18min
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 18min).
Average sunshine days in September
Old Middleton, TN
- Average sunshine days in September: 14.6 days
The months with the most sunshine days are October and November (18 days).
The month with the least sunshine days is July (10 days).
Average UV index in September
Old Middleton, 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
Old Middleton, TN
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 55).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Old Middleton, TN
- Average visibility in September: 5mi
The months with the highest visibility are February, April, June, October, November and December (6mi).
The months with the lowest visibility are January, March, May, July, August and September (5mi).
