September weather forecastGatlinburg, TN
September
Weather in September
The arrival of fall is signalled with a gradual decrease in temperature to 77.7°F (25.4°C) in September. Showcasing the best of both, summer warmth and autumn winds, this month is an enjoyable time in Gatlinburg. September maintains a cosy weather, inviting nature lovers to enjoy the outdoors. As rainfall dips to 2.44" (62mm), the clear skies enrich the evenings with a golden hue. This marks an ideal time for contemplating the changing beauty of Gatlinburg from various vantage points.Temperature
The transition into September shows a subtle variation to a still warm 77.7°F (25.4°C) from August's 82.9°F (28.3°C) in the average high-temperature. September brings Gatlinburg a consistent average low-temperature of 56.3°F (13.5°C).Humidity
In Gatlinburg, Tennessee, the average relative humidity in September is 77%.Rainfall
The month with the least rainfall in Gatlinburg is September, when the rain falls for 16.5 days and typically collects 2.44" (62mm) of precipitation.Snowfall
May through September are months without snowfall in Gatlinburg.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September in Gatlinburg, sunrise is at 7:06 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:18 pm EDT.
Sunshine
In September, the average sunshine in Gatlinburg is 8.6h.UV index
In Gatlinburg, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Around midday, solar radiation is most harmful; hence, exposure should be limited. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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
Gatlinburg, 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).
