Gatlinburg, TN weather in September
September in Gatlinburg: mild and often humid, with frequent rain. Highs 78°F, lows 56°F, about 11 days with rain.
- Normal high
- 78°F
- Normal low
- 56°F
- Wet days
- 11
- 4.3 in total
- Muggy days
- 9
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 81°F | 74°F |
| Normal low | 60°F | 51°F |
| Chance of a wet day | 39% | 34% |
| Sunrise / sunset | 7:06 am / 8:01 pm | 7:28 am / 7:19 pm |
| Daylight | 12.9 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am63°Fdew point 60°F
- 9 am69°Fdew point 62°F
- Noon77°Fdew point 61°F
- 3 pm81°Fdew point 60°F
- 6 pm78°Fdew point 60°F
- 9 pm71°Fdew point 61°F
NOAA hourly normals (local standard time) from Knoxville Mcghee Tyson Airport (28 mi away); average wind 5 mph; clear or few clouds in 57% of daytime hours, mostly cloudy or overcast in 32%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F8 of 30
- Hot dayshigh 90°F or more1 of 30
- Muggy daysdaily mean dew point 65°F or more9 of 30
- Wet daysat least 0.01 in of rain or melted snow11 of 30
- Notable rainat least 0.10 in7 of 30
- Freezing nightslow 32°F or below0 of 30
- Snow on the groundsnow depth 1 in or more0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 4.3 in; a dry September brings about 3.0 in and a wet one about 5.3 in (25th and 75th percentiles). About 3 days bring half an inch or more, and about 1 an inch or more.
How September varies from year to year
- Warmest September, 1991-20201998: average high 86°F
- Coolest September2020: average high 74°F
- Wettest September2018: 8.7 in
- Driest September2019: 0.3 in
- Highest reading95°F (September 4, 2011)
- Lowest reading34°F (September 27, 2001)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 82°F | 78°F | 69°F |
| Normal low | 62°F | 56°F | 44°F |
| Wet days | 14 | 11 | 10 |
| Comfortable days | 1 | 8 | 18 |
| Daylight | 13.5 h | 12.4 h | 11.3 h |
Highs change by -4°F from August and -9°F into October.
Nearby alternatives in September
- Warmer: Knoxville, TN29 mi · high 83°F · 9 wet days
- Drier: Chattanooga, TN111 mi · high 84°F · 8 wet days
How Gatlinburg ranks in September
- Normal high233rd warmest of 378 cities; 7th of 7 in Tennessee
- Wet days334th driest of 378
- Comfortable days179th most of 342
What to pack for Gatlinburg in September
- A rain jacket or umbrella – rain on about 11 days
Heating and cooling
September has 47 heating degree days and 101 cooling degree days (base 65°F), 3% of the year's total heating and cooling demand.
Questions
How hot is Gatlinburg in September?
The normal high is 78°F and the normal low is 56°F. From 1991 to 2020 the hottest September reading was 95°F (most recently on September 4, 2011).
Does it rain a lot in Gatlinburg in September?
About 11 days in September have at least 0.01 in of precipitation, and the normal total is 4.3 in. The wettest September in 1991-2020 was in 2018 (8.7 in); the driest was in 2019 (0.4 in).
Is September a good time to visit Gatlinburg?
September ranks 5th of 12 months on our comfort score for Gatlinburg (57 out of 100). It has about 8 comfortable days and about 1 day at 90°F or hotter. The best months are April and October.
Where the numbers come from
- Temperature, rain, snowfall, snow depth and frost dates: Gatlinburg 2 Sw (USC00403420), 2.4 mi SW of the city center, 1,454 ft (164 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: Knoxville Mcghee Tyson Airport (USW00013891), 28 mi WNW of the city center, 962 ft (328 ft lower than the city). NOAA normals and daily records, 1991-2020.
- Cloud cover: Asheville Rgnl Airport (USW00003812), 58 mi ESE of the city center, 2,117 ft (827 ft higher than the city). NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Mc Ghee Tyson Airport (723260-13891), 28 mi WNW of the city center, 970 ft (320 ft lower than the city). Hourly observations, 1991-2020.