Columbia weather in September

In September, Columbia sees average daytime highs of 82°F and overnight lows near 62°F, with 3.2 in of rain across 7.8 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 12th-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 43% 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 Columbia's 2nd-clearest and 9th-windiest month. For the whole year in context, see Columbia's year-round climate.

Daytime high
82°
4th warmest
Overnight low
62°
9th coldest
Rainfall
3.2 in
7.8 wet days
Daylight
12 h 12 min
5:36 AM – 5:49 PM
Cloud cover
49%
2nd clearest
Wind
5 mph
9th windiest
Solar energy
4.75 kWh/m²
Travel score
6.3
out of 10

Columbia is city in and county seat of Maury County, Tennessee, United States.

Density
450/km²
people per km²
Founded
1808

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 Columbia reaches about 82°F in the afternoon and slips back to 62°F overnight — a 20°F spread between the day's warmth and the night's chill. On most days the high lands between 74°F and 90°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)
18667
28667
38667
48666
58566
68566
78565
88565
98565
108464
118464
128464
138364
148363
158363
168362
178262
188262
198261
208161
218161
228160
238060
248059
258059
267958
277958
287858
297857
307857

How September really feels in Columbia

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.

Columbia weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan48° / 32°4.49.71.19.91.9
Feb53° / 35°4.710.51.310.72.8
Mar61° / 42°5.211.30.711.75.0
Apr70° / 50°4.910.3012.96.4
May78° / 60°4.511.9013.96.4
Jun85° / 68°4.012.7014.44.8
Jul88° / 71°4.313014.24.1
Aug88° / 69°3.210.7013.34.5
Sep82° / 62°3.27.8012.26.3
Oct72° / 51°3.57.9011.17.2
Nov60° / 41°3.98.70.110.15.0
Dec51° / 35°5.010.40.59.62.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 18% 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
25842
36040
46040
56040
66040
76040
86040
96040
106040
116040
125941
135941
145842
155842
165842
175941
185842
195842
205842
215941
225941
236139
246139
256238
266337
276436
286535
296535
306733

Chance of precipitation in September

Any precipitation

Columbia gets around 3.2 in of rain over 7.8 wet days in September, the driest month. 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 (%)
128
228
328
427
527
627
727
826
926
1026
1126
1226
1326
1426
1527
1627
1728
1828
1928
2028
2128
2227
2327
2426
2525
2625
2724
2824
2923
3023

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 35% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1512253920
2512263819
3613263718
4713273616
5814273515
6915283414
71015283313
81216283212
91317283111
101417283010
111518282910
12171828289
13181827279
14191927279
15201926269
16221926259
17231925248
18241925238
19261924238
20271924227
21291924217
22311923206
23331923196
24351922185
25371922175
26391921164
27401921164
28422020153
29432020143
30452019142

Wind in September

Winds average 5 mph in September.

Across September, daily wind ranges from about 5 mph on the calmest days to 6 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
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 5:24 AM to 5:47 AM, and sunset from 6:12 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.85:246:12
212.85:256:10
312.75:266:09
412.75:266:07
512.65:276:06
612.65:286:04
712.65:296:03
812.55:306:01
912.55:306:00
1012.55:315:58
1112.45:325:57
1212.45:335:55
1312.35:335:54
1412.35:345:52
1512.35:355:51
1612.25:365:49
1712.25:375:48
1812.15:375:46
1912.15:385:45
2012.15:395:43
2112.05:405:41
2212.05:415:40
2312.05:415:38
2411.95:425:37
2511.95:435:35
2611.85:445:34
2711.85:455:32
2811.85:455:31
2911.75:465:29
3011.75:475:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.75 kWh/m².

For context, solar energy here swings from a low near 2.1 kWh/m² to a high of 6.2 kWh/m² in June across the year — September's 4.75 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.1Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
104.9Bright
114.9Bright
124.9Bright
134.8Bright
144.8Bright
154.8Bright
164.7Bright
174.7Bright
184.7Bright
194.6Bright
204.6Bright
214.6Bright
224.5Bright
234.5Bright
244.5Bright
254.5Bright
264.4Bright
274.4Bright
284.4Bright
294.4Bright
304.3Bright
Planning a trip in September

Is September a good time to visit Columbia?

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

6.3
Sightseeing
4th-best month of the year
7.1
Beach & pool
1st-best month of the year

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

What to pack for Columbia in September

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

In September, Columbia sees daytime highs around 82°F and nights near 62°F. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Columbia 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 Columbia peaks around July 12 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 2 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateJul 12UV 10Dec 19UV 2
UV index (midday)Level
Jan3Moderate
Feb4Moderate
Mar6High
Apr7Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep7Very high
Oct5Moderate
Nov4Moderate
Dec2Moderate

Air quality in Columbia 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 Columbia is worst in July — around 18 µg/m³ PM2.5 (moderate), about 3.2× the cleanest month (January, 6 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1618 µg/m³Jan 16 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar9Good
Apr9Good
May12Moderate
Jun15Moderate
Jul18Moderate
Aug15Moderate
Sep10Good
Oct7Good
Nov6Good
Dec6Good
Location & terrain

Where is Columbia?

Columbia sits at 35.6°N, 87.0°W, 643 ft above sea level, in United States. The nearest listed city is Spring Hill, 11 mi away.

Topography around Columbia

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

Within 2 miles, the terrain around Columbia has only modest variations in elevation — a maximum elevation change of 374 ft around an average of 653 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 643 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,194 ft.

The land around Columbia is covered by trees (50%) and grassland (29%) within 2 miles, trees (56%) and grassland (34%) within 10 miles, and trees (70%) and grassland (23%) within 50 miles.

2 miles
374 ft
10 miles
643 ft
50 miles
1,194 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Spring Hill 11 mi · Franklin 24 mi · Brentwood Estates 32 mi · Brentwood 32 mi · Shelbyville 34 mi · Dickson 37 mi · La Vergne 37 mi · Smyrna 39 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 Columbia (35.6151°, -87.0353°, elevation 643 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).