Cullman weather in September

In September, Cullman sees average daytime highs of 83°F and overnight lows near 64°F, with 3.4 in of rain across 7.4 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 86°F in the first days to 79°F by the end. The sky is clear or mostly clear about 41% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 42 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Cullman's 2nd-clearest and 9th-windiest month. For the whole year in context, see Cullman's year-round climate.

Daytime high
83°
4th warmest
Overnight low
64°
9th coldest
Rainfall
3.4 in
7.4 wet days
Daylight
12 h 12 min
5:35 AM – 5:48 PM
Cloud cover
50%
2nd clearest
Wind
5 mph
9th windiest
Solar energy
4.8 kWh/m²
Travel score
6.2
out of 10

Cullman is city and county seat of Cullman County, Alabama, United States.

Density
288/km²
people per km²
Founded
1873

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 79°F by the end.

A typical September day in Cullman reaches about 83°F in the afternoon and slips back to 64°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 75°F and 91°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)
18768
28768
38668
48668
58667
68667
78667
88567
98566
108566
118566
128565
138465
148465
158464
168364
178364
188364
198263
208263
218262
228262
238162
248161
258061
268060
278060
287959
297959
307959

How September really feels in Cullman

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.

Cullman 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
Jan51° / 34°5.0100.6102.6
Feb56° / 37°4.810.40.610.73.6
Mar64° / 44°5.4110.211.75.6
Apr72° / 52°4.810.2012.86.7
May80° / 61°4.010.8013.86.5
Jun86° / 68°4.012.7014.24.7
Jul88° / 71°4.214.10144.0
Aug88° / 70°3.011.8013.34.3
Sep83° / 64°3.47.4012.26.2
Oct73° / 52°3.47.3011.17.4
Nov62° / 42°4.08.70.110.25.6
Dec54° / 37°5.110.60.39.83.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 20% 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
35941
45941
56040
66040
76139
86139
96238
106139
116139
126238
136139
146139
156040
165941
175842
185842
195842
205842
215842
225941
235941
246040
256040
266139
276238
286238
296337
306436

Chance of precipitation in September

Any precipitation

Cullman gets around 3.4 in of rain over 7.4 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 31% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
131
230
330
429
528
627
726
826
925
1025
1125
1224
1325
1425
1525
1625
1726
1826
1926
2026
2126
2225
2325
2424
2524
2623
2723
2822
2922
3022

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 28% of days. Sticky, muggy-or-worse air turns up on roughly 41% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
138234124
239244123
3410244121
4411254020
5511263919
6612273817
7613273716
8714283515
9815283415
10916283314
111016293213
121017293113
131118293013
141218292912
151319292812
161419292712
171519292612
181619292512
191720292411
201820282311
212020282210
22222028219
23232028218
24252027208
25272027197
26292026196
27312025186
28332025185
29342024174
30362024174

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 42 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 60 minutes over September. Sunrise moves from 5:25 AM to 5:46 AM, and sunset from 6:10 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:256:10
212.75:256:08
312.75:266:07
412.65:276:05
512.65:286:04
612.65:286:02
712.55:296:01
812.55:306:00
912.55:305:58
1012.45:315:57
1112.45:325:55
1212.45:335:54
1312.35:335:52
1412.35:345:51
1512.25:355:49
1612.25:355:48
1712.25:365:47
1812.15:375:45
1912.15:385:44
2012.15:385:42
2112.05:395:41
2212.05:405:39
2312.05:405:38
2411.95:415:36
2511.95:425:35
2611.85:435:33
2711.85:435:32
2811.85:445:31
2911.75:455:29
3011.75:465:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.8 kWh/m².

For context, solar energy here swings from a low near 2.24 kWh/m² to a high of 6.12 kWh/m² in June across the year — September's 4.8 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
124.9Bright
134.9Bright
144.9Bright
154.8Bright
164.8Bright
174.8Bright
184.7Bright
194.7Bright
204.7Bright
214.6Bright
224.6Bright
234.6Bright
244.5Bright
254.5Bright
264.5Bright
274.5Bright
284.4Bright
294.4Bright
304.4Bright
Planning a trip in September

Is September a good time to visit Cullman?

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

6.2
Sightseeing
4th-best month of the year
7.2
Beach & pool
1st-best month of the year

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

What to pack for Cullman in September

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

In September, Cullman sees daytime highs around 83°F and nights near 64°F. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Cullman in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cullman peaks around July 12 at about 10 (extreme) — 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 highVery highHighModerateJul 12UV 10Dec 19UV 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in Cullman 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 Cullman is worst in July — around 19 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (January, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1719 µg/m³Jan 116 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb8Good
Mar10Good
Apr10Good
May13Moderate
Jun16Moderate
Jul19Moderate
Aug16Moderate
Sep11Good
Oct8Good
Nov7Good
Dec6Good
Location & terrain

Where is Cullman?

Cullman sits at 34.2°N, 86.8°W, 794 ft above sea level, in United States. The nearest listed city is Decatur, 31 mi away.

Topography around Cullman

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

Within 2 miles, the terrain around Cullman has only modest variations in elevation — a maximum elevation change of 331 ft around an average of 787 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 679 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,499 ft.

The land around Cullman is covered by trees (54%) and grassland (24%) within 2 miles, trees (58%) and grassland (34%) within 10 miles, and trees (71%) within 50 miles.

2 miles
331 ft
10 miles
679 ft
50 miles
1,499 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Decatur 31 mi · Dixiana 32 mi · Madison 37 mi · Albertville 37 mi · Center Point 38 mi · Trussville 40 mi · Huntsville 41 mi · Athens 44 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 Cullman (34.1748°, -86.8436°, elevation 794 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).