September weather forecastTownsend, TN
September
Weather in September
September marks a gradual transition from summer to fall with temperatures cooling down to 77.7°F (25.4°C). It brings along 2.44" (62mm) of rainfall spanning a whole of 16.5 days. Despite the decrease in temperatures, the relative humidity remains steady at 77%. An hour shorter daylight time from August to September signals the impending arrival of autumn. Thus, weather conditions in Townsend, Tennessee in this month can be characterized by a mild drop in temperature, consistent humidity, and decreasing daylight.Temperature
With the onset of September, the average high-temperature registers at a still moderately hot 77.7°F (25.4°C), subtly different from August's 82.9°F (28.3°C). During September, the nighttime temperature averages to a moderate 56.3°F (13.5°C).Humidity
In September, the average relative humidity is 77%.Rainfall
September is the month with the least rainfall. Rain falls for 16.5 days and accumulates 2.44" (62mm) of precipitation.Snowfall
In Townsend, snow does not fall in May through September.Daylight
In Townsend, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 7:07 am and sunset at 8:01 pm. On the last day of September, sunrise is at 7:29 am and sunset at 7:19 pm EDT.
Sunshine
In Townsend, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: A daily high UV index of 4 in September leads to these guidelines:
Ensure safety - Imperative it is to shield skin and eyes from damage. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Townsend, TN
- Average high temperature in September: 77.7°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in September
Townsend, TN
- Average pressure in September: 30.04"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Townsend, TN
- Average wind speed in September: 3.7mph
The windiest month (with the highest average wind speed) is April (5.7mph).
The calmest month (with the lowest average wind speed) is August (3.5mph).
Average humidity in September
Townsend, TN
- Average humidity in September: 77%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are June, July, August and November (76%).
Average rainfall in September
Townsend, TN
- Average rainfall in September: 2.44"
The wettest month (with the highest rainfall) is July (4.37").
The driest month (with the least rainfall) is September (2.44").
Average rainfall days in September
Townsend, TN
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is July (21.6 days).
The month with the least rainy days is November (11.9 days).
Average snowfall in September
Townsend, TN
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.35").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Townsend, TN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Townsend, TN
- Average daylight in September: 12h and 24min
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 36min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Townsend, TN
- Average sunshine days in September: 11.2 days
The month with the most sunshine days is October (16.7 days).
The month with the least sunshine days is July (6.8 days).
Average UV index in September
Townsend, TN
- Average UV index in September: 4
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
Townsend, TN
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Townsend, TN
- Average visibility in September: 5mi
The months with the highest visibility are June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October and December (5mi).
