Cullman weather in May

In May, Cullman sees average daytime highs of 80°F and overnight lows near 61°F, with 4.0 in of rain across 10.8 wet days and about 13.8 hours of daylight. It is the 5th-warmest and 7th-wettest month of the year here.

Highs climb over the month, from about 76°F in the first days to 83°F by the end. The sky is clear or mostly clear about 32% of the time in May, and the air most often feels dry.

Daylight stretches from about 13 h 18 min at the start of May to 14 h 06 min by month's end. Set against the rest of the year, May is Cullman's 6th-clearest and 8th-windiest month. For the whole year in context, see Cullman's year-round climate.

Daytime high
80°
5th warmest
Overnight low
61°
8th coldest
Rainfall
4.0 in
10.8 wet days
Daylight
13 h 48 min
4:50 AM – 6:37 PM
Cloud cover
57%
6th clearest
Wind
6 mph
8th windiest
Solar energy
6.06 kWh/m²
Travel score
6.5
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 May

Average highAverage lowShaded bands: 10–90% of days

Highs climb over the month, from about 76°F in the first days to 83°F by the end.

A typical May day in Cullman reaches about 80°F in the afternoon and slips back to 61°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 71°F and 87°F. Set against its neighbours, May runs about 8°F warmer than April and about 6°F cooler than June.

40°60°80°151015202531
Avg high (°F)Avg low (°F)
17656
27656
37656
47657
57757
67757
77758
87858
97858
107859
117859
127959
137960
147960
157960
168061
178061
188061
198062
208162
218162
228163
238163
248263
258264
268264
278264
288365
298365
308365
318365

How May really feels in Cullman

Once humidity and wind are folded in, May 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

May 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 May compares with the rest of the year at a glance. May is the 5th-warmest and 7th-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 May

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 32% of the time in May.

Beyond those clear spells, partly cloudy skies cover about 18% of May, with mostly cloudy or overcast conditions the remaining 50%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15050
25149
35248
45248
55149
65149
75149
85149
95149
105248
115149
125149
135149
145149
155248
165149
175149
185149
195149
205050
215149
225050
234951
244951
254951
264852
274852
284852
294753
304654
314654

Chance of precipitation in May

Any precipitation

Cullman gets around 4.0 in of rain over 10.8 wet days in May. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 35% and peaks near 40% on the wettest days.

0%10%20%30%40%50%151015202531
Rain chance (%)
135
235
335
434
534
634
735
835
934
1034
1134
1234
1334
1434
1534
1633
1733
1833
1933
2034
2134
2234
2335
2435
2536
2637
2738
2838
2939
3040
3140

Humidity in May

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, May lands in the dry band about 28% of days. Sticky, muggy-or-worse air turns up on roughly 26% of them.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
149232170
247232280
345232390
4432324100
5412325100
6392326120
7382326130
8372326140
9352327150
10342327160
11332327180
12322227190
13302227200
14302128210
15292128230
16282028240
17272027250
18261927271
19261927281
20251926291
21231826311
22221826322
23211826332
24191826343
25181826353
26161826364
27151826374
28131825385
29121825396
30111824407
31101824418

Wind in May

Winds average 6 mph in May.

Across May, daily wind ranges from about 5 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202531
Wind speed (mph)Feels
17calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
275calm
285calm
295calm
305calm
315calm

Sunrise & sunset in May

DaylightNight

Daylight runs from about 13 h 18 min at the start of May to 14 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 48 minutes over May. Sunrise moves from 5:04 AM to 4:42 AM, and sunset from 6:25 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.35:046:25
213.45:036:26
313.45:026:27
413.45:016:27
513.55:006:28
613.54:596:29
713.54:586:30
813.64:576:31
913.64:566:31
1013.64:556:32
1113.64:546:33
1213.74:546:34
1313.74:536:35
1413.74:526:35
1513.74:516:36
1613.84:506:37
1713.84:506:38
1813.84:496:38
1913.84:486:39
2013.94:486:40
2113.94:476:41
2213.94:466:41
2313.94:466:42
2414.04:456:43
2514.04:456:43
2614.04:446:44
2714.04:446:45
2814.04:436:46
2914.14:436:46
3014.14:426:47
3114.14:426:47

Solar energy in May

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in May, about 6.06 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 — May's 6.06 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
56.0Bright
66.0Bright
76.0Bright
86.0Intense
96.0Intense
106.0Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.0Intense
286.0Intense
296.0Intense
306.0Intense
316.0Intense
Planning a trip in May

Is May a good time to visit Cullman?

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

6.5
Sightseeing
3rd-best month of the year
6.4
Beach & pool
4th-best month of the year

May 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 May

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

In May, Cullman sees daytime highs around 80°F and nights near 61°F. Pack sun protection. Worth having: light clothes and rain gear. About 11 days see rain.

sun protectionlight clothesrain gear

UV index in Cullman in May

LowModerateHighVery highExtreme

Clear-sky midday UV in May peaks around 8 (very high — sun protection essential). 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 May

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where May 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
May 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).