Mount Juliet weather in September

In September, Mount Juliet sees average daytime highs of 82°F and overnight lows near 63°F, with 3.3 in of rain across 7.8 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 11th-wettest month of the year here.

Highs ease over the month, from about 86°F in the first days to 78°F by the end. The sky is clear or mostly clear about 44% of the time in September, and the air most often feels muggy.

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 Mount Juliet's 2nd-clearest and 9th-windiest month. For the whole year in context, see Mount Juliet's year-round climate.

Daytime high
82°
4th warmest
Overnight low
63°
9th coldest
Rainfall
3.3 in
7.8 wet days
Daylight
12 h 12 min
5:34 AM – 5:47 PM
Cloud cover
49%
2nd clearest
Wind
5 mph
9th windiest
Solar energy
4.68 kWh/m²
Travel score
6.4
out of 10

Mount Juliet is city in Wilson County, Tennessee, United States; suburb of Nashville, Tennessee.

Density
615/km²
people per km²
Founded
1835

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 86°F in the first days to 78°F by the end.

A typical September day in Mount Juliet reaches about 82°F in the afternoon and slips back to 63°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 73°F and 91°F. Set against its neighbours, September runs about 5°F cooler than August and about 11°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18668
28667
38667
48667
58566
68566
78566
88565
98465
108465
118464
128364
138364
148363
158363
168263
178262
188262
198162
208161
218161
228060
238060
248060
257959
267959
277858
287858
297857
307857

How September really feels in Mount Juliet

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.

Mount Juliet weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 11th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan47° / 31°4.210.51.79.81.4
Feb51° / 34°4.610.41.710.62.4
Mar60° / 41°5.011.50.711.74.7
Apr70° / 50°5.010.7012.96.3
May78° / 60°4.712.2013.96.4
Jun85° / 68°3.912.9014.44.8
Jul88° / 71°4.112.6014.24.1
Aug88° / 70°3.210.2013.44.5
Sep82° / 63°3.37.8012.26.4
Oct71° / 51°3.57.8011.17.1
Nov59° / 41°4.08.90.210.14.8
Dec50° / 35°5.010.60.79.62.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 40%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15842
25941
36040
46040
56040
66139
76139
86139
96139
106139
116139
126139
135941
145941
155941
165842
175842
185842
195842
205842
215842
225941
236040
246040
256139
266238
276238
286337
296436
306535

Chance of precipitation in September

Any precipitation

Mount Juliet gets around 3.3 in of rain over 7.8 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 26% and peaks near 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
127
227
327
426
526
626
725
825
925
1024
1124
1224
1324
1425
1525
1626
1726
1827
1927
2028
2128
2228
2327
2427
2526
2626
2725
2825
2924
3024

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 26% of days. Sticky, muggy-or-worse air turns up on roughly 36% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1410213926
2511223824
3611233823
4712243721
5812253519
6913263418
71014273316
81114283215
91215293113
101316293012
111416292911
121517292810
131617292710
14181729279
15191828269
16201828258
17221928248
18231927237
19251927237
20261926227
21281925216
22301925206
23322024195
24342023185
25362023174
26382022164
27392021154
28412021143
29432120143
30442119133

Wind in September

Winds average 5 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 5 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

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 5:22 AM to 5:45 AM, and sunset from 6:10 PM to 5:26 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:226:10
212.85:226:09
312.75:236:07
412.75:246:06
512.75:256:04
612.65:266:03
712.65:266:01
812.55:276:00
912.55:285:58
1012.55:295:56
1112.45:305:55
1212.45:305:53
1312.35:315:52
1412.35:325:50
1512.35:335:49
1612.25:345:47
1712.25:345:46
1812.15:355:44
1912.15:365:43
2012.15:375:41
2112.05:385:39
2212.05:385:38
2312.05:395:36
2411.95:405:35
2511.95:415:33
2611.85:425:32
2711.85:435:30
2811.85:435:29
2911.75:445:27
3011.75:455:26

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.68 kWh/m².

For context, solar energy here swings from a low near 1.97 kWh/m² to a high of 6.19 kWh/m² in June across the year — September's 4.68 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
75.0Bright
84.9Bright
94.9Bright
104.9Bright
114.8Bright
124.8Bright
134.8Bright
144.7Bright
154.7Bright
164.7Bright
174.6Bright
184.6Bright
194.6Bright
204.5Bright
214.5Bright
224.5Bright
234.4Bright
244.4Bright
254.4Bright
264.4Bright
274.3Bright
284.3Bright
294.3Bright
304.3Bright
Planning a trip in September

Hazard calendar for Mount Juliet

In seasonPeak

In September, Mount Juliet sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Mount Juliet sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Mount Juliet?

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

6.4
Sightseeing
2nd-best month of the year
7.2
Beach & pool
1st-best month of the year

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

What to pack for Mount Juliet in September

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

In September, Mount Juliet sees daytime highs around 82°F and nights near 63°F. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Mount Juliet 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 Mount Juliet peaks around July 11 at about 9 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 21 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 11UV 9Dec 21UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug8Very high
Sep7High
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Mount Juliet 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 Mount Juliet is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1518 µg/m³Dec 176 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar9Good
Apr10Good
May13Moderate
Jun15Moderate
Jul18Moderate
Aug14Moderate
Sep11Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is Mount Juliet?

Mount Juliet sits at 36.2°N, 86.5°W, 551 ft above sea level, in United States. The nearest listed city is Hermitage, 5.6 mi away.

Topography around Mount Juliet

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

Within 2 miles, the terrain around Mount Juliet has only modest variations in elevation — a maximum elevation change of 256 ft around an average of 574 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 669 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,919 ft.

The land around Mount Juliet is covered by trees (54%) and grassland (32%) within 2 miles, trees (53%) and grassland (27%) within 10 miles, and trees (58%) and grassland (26%) within 50 miles.

2 miles
256 ft
10 miles
669 ft
50 miles
1,919 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Hermitage 5.6 mi · Hendersonville 9.3 mi · Lebanon 12 mi · La Vergne 13 mi · Gallatin 14 mi · Goodlettsville 14 mi · Smyrna 15 mi · Nashville 15 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 Mount Juliet (36.2°, -86.5186°, elevation 551 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). 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).