Gatlinburg weather in September

In September, Gatlinburg sees average daytime highs of 77°F and overnight lows near 58°F, with 3.8 in of rain across 10 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 10th-wettest month of the year here.

Highs ease over the month, from about 80°F in the first days to 74°F by the end. The sky is clear or mostly clear about 40% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 12 h 48 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Gatlinburg's 3rd-clearest and 10th-windiest month. For the whole year in context, see Gatlinburg's year-round climate.

Daytime high
77°
4th warmest
Overnight low
58°
9th coldest
Rainfall
3.8 in
10 wet days
Daylight
12 h 12 min
6:22 AM – 6:35 PM
Cloud cover
52%
3rd clearest
Wind
3 mph
10th windiest
Solar energy
4.6 kWh/m²
Travel score
6.9
out of 10

Gatlinburg is resort city in Sevier County, Tennessee, United States.

Density
156/km²
people per km²
Founded
1945

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 80°F in the first days to 74°F by the end.

A typical September day in Gatlinburg reaches about 77°F in the afternoon and slips back to 58°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 69°F and 85°F. Set against its neighbours, September runs about 5°F cooler than August and about 10°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18062
28062
38062
48062
58061
68061
77961
87960
97960
107860
117860
127859
137859
147859
157758
167758
177758
187658
197657
207657
217657
227556
237556
247556
257455
267455
277455
287454
297354
307353

How September really feels in Gatlinburg

Once humidity and wind are folded in, September averages 0 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
0
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Gatlinburg weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan46° / 28°4.512.43.79.91.2
Feb50° / 32°4.112.14.110.62.0
Mar58° / 38°4.813.12.311.74.1
Apr67° / 46°4.612.10.812.95.8
May73° / 54°4.414.3013.96.1
Jun80° / 62°4.115.2014.45.8
Jul82° / 65°4.616014.25.5
Aug82° / 64°3.613.8013.45.9
Sep77° / 58°3.810012.26.9
Oct67° / 47°3.19.10.211.16.5
Nov57° / 37°3.89.90.710.14.2
Dec49° / 32°4.211.52.69.61.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 40% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15743
25941
35941
46040
56040
66040
76139
86139
96040
106040
116139
126040
136040
145941
155941
165842
175842
185743
195743
205644
215644
225743
235743
245743
255941
265941
275941
286040
296040
306040

Chance of precipitation in September

Any precipitation

Gatlinburg gets around 3.8 in of rain over 10 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 33% and peaks near 38% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
138
238
338
438
537
637
736
835
935
1034
1133
1232
1332
1432
1531
1631
1731
1831
1931
2031
2131
2231
2331
2430
2530
2630
2730
2830
2929
3029

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels comfortable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the comfortable band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 16% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
19203734
210223632
310233630
411253529
512273427
613283325
714303223
815313222
917323120
1018333019
1119343017
1220342916
1321342915
1422352815
1523352814
1624352714
1725352713
1826352613
1927352612
2029342512
2130342511
2232332411
2334322410
243632239
253831239
264030228
274130217
284329217
294529206
304728196

Wind in September

Winds average 3 mph in September.

Across September, daily wind ranges from about 3 mph on the calmest days to 4 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
13calm
23calm
33calm
43calm
53calm
63calm
73calm
83calm
93calm
103calm
113calm
123calm
133calm
143calm
153calm
163calm
173calm
183calm
193calm
203calm
213calm
223calm
233calm
244calm
254calm
264calm
274calm
284calm
294calm
304calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 48 min at the start of September to 11 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 66 minutes over September. Sunrise moves from 6:10 AM to 6:33 AM, and sunset from 6:58 PM to 6:14 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.86:106:58
212.86:116:56
312.76:126:55
412.76:126:53
512.66:136:52
612.66:146:50
712.66:156:49
812.56:156:47
912.56:166:46
1012.56:176:44
1112.46:186:43
1212.46:196:41
1312.36:196:40
1412.36:206:38
1512.36:216:37
1612.26:226:35
1712.26:226:34
1812.16:236:32
1912.16:246:30
2012.16:256:29
2112.06:266:27
2212.06:266:26
2312.06:276:24
2411.96:286:23
2511.96:296:21
2611.86:306:20
2711.86:306:18
2811.86:316:17
2911.76:326:15
3011.76:336:14

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.6 kWh/m².

For context, solar energy here swings from a low near 2.16 kWh/m² to a high of 6.09 kWh/m² in June across the year — September's 4.6 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.0Bright
45.0Bright
55.0Bright
64.9Bright
74.9Bright
84.9Bright
94.8Bright
104.8Bright
114.8Bright
124.8Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.6Bright
184.5Bright
194.5Bright
204.5Bright
214.4Bright
224.4Bright
234.4Bright
244.3Bright
254.3Bright
264.3Bright
274.3Bright
284.3Bright
294.2Bright
304.2Bright
Planning a trip in September

Is September a good time to visit Gatlinburg?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.9
Sightseeing
1st-best month of the year
6.2
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Gatlinburg for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Gatlinburg in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Gatlinburg sees daytime highs around 77°F and nights near 58°F. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

UV index in Gatlinburg in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 7 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Gatlinburg peaks around July 11 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 3 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 11UV 10Dec 19UV 3
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun10Very high
Jul10Very high
Aug8Very high
Sep7Very high
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Gatlinburg in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Gatlinburg is worst in July — around 18 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (December, 6 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1517 µg/m³Dec 226 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb8Good
Mar10Good
Apr11Good
May13Moderate
Jun16Moderate
Jul18Moderate
Aug15Moderate
Sep11Good
Oct8Good
Nov8Good
Dec6Good
Location & terrain

Where is Gatlinburg?

Gatlinburg sits at 35.7°N, 83.5°W, 0 ft above sea level, in United States. The nearest listed city is Sevierville, 11 mi away.

Topography around Gatlinburg

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Gatlinburg.

Within 2 miles, the terrain around Gatlinburg has significant variations in elevation — a maximum elevation change of 1,450 ft around an average of 1,791 ft above sea level; within 10 miles, very significant variations in elevation — a maximum elevation change of 5,889 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,981 ft.

The land around Gatlinburg is covered by trees (92%) within 2 miles, trees (92%) within 10 miles, and trees (80%) within 50 miles.

2 miles
1,450 ft
10 miles
5,889 ft
50 miles
5,981 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Sevierville 11 mi · Maryville 26 mi · Knoxville 29 mi · Morristown 37 mi · Farragut 38 mi · Oak Ridge 47 mi · Greeneville 49 mi · Asheville 54 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Gatlinburg (35.7145°, -83.5119°, elevation 0 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).