Alabaster weather in September

In September, Alabaster sees average daytime highs of 84°F and overnight lows near 65°F, with 3.3 in of rain across 7.7 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 87°F in the first days to 81°F by the end. The sky is clear or mostly clear about 40% 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 Alabaster's 3rd-clearest and 9th-windiest month. For the whole year in context, see Alabaster's year-round climate.

Daytime high
84°
4th warmest
Overnight low
65°
9th coldest
Rainfall
3.3 in
7.7 wet days
Daylight
12 h 12 min
5:36 AM – 5:48 PM
Cloud cover
51%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
4.82 kWh/m²
Travel score
5.8
out of 10

Alabaster is suburb city of Birmingham, located in Shelby County, Alabama, United States.

Density
499/km²
people per km²
Founded
1953

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 87°F in the first days to 81°F by the end.

A typical September day in Alabaster reaches about 84°F in the afternoon and slips back to 65°F overnight — a 19°F spread between the day's warmth and the night's chill. On most days the high lands between 77°F and 92°F. Set against its neighbours, September runs about 4°F cooler than August and about 9°F warmer than October.

40°60°80°151015202530
Avg high (°F)Avg low (°F)
18769
28769
38769
48769
58769
68768
78768
88668
98667
108667
118667
128667
138566
148566
158566
168566
178565
188465
198465
208464
218364
228364
238363
248263
258262
268262
278162
288161
298161
308060

How September really feels in Alabaster

Once humidity and wind are folded in, September averages 4 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
4
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Alabaster 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
Jan54° / 36°4.89.80.5103.4
Feb59° / 39°5.110.30.310.84.4
Mar66° / 46°5.5110.211.76.0
Apr74° / 53°4.39.2012.87.0
May81° / 62°3.89.8013.76.4
Jun87° / 69°4.112.9014.24.4
Jul89° / 72°4.414.40143.7
Aug89° / 71°3.812.6013.24.0
Sep84° / 65°3.37.7012.25.8
Oct75° / 54°3.37011.27.5
Nov64° / 44°3.97.8010.36.2
Dec56° / 39°5.010.10.19.83.9

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 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 (%)
15545
25644
35743
45842
55842
66040
76040
86139
96139
106238
116337
126337
136337
146238
156238
166139
176040
186040
195941
205941
215941
226040
236040
246040
256040
266139
276238
286238
296238
306238

Chance of precipitation in September

Any precipitation

Alabaster gets around 3.3 in of rain over 7.7 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 30% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
130
230
329
429
528
628
727
827
927
1026
1126
1226
1326
1426
1527
1627
1727
1827
1927
2027
2126
2226
2325
2424
2524
2623
2723
2822
2922
3021

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 30% of days. Sticky, muggy-or-worse air turns up on roughly 51% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1261738361
2261838351
3371938331
4372038321
5482037310
6482137290
7492236280
85102336270
95112335260
106122434250
116122433240
127132432230
137142531230
148152530220
158162529220
169162529210
1710172528200
1810172527200
1911172527190
2013182526180
2114182526170
2216182526160
2318182425140
2419182425130
2521192325120
2623192324110
2725192224100
282719222390
292819222380
303019212280

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
226calm
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 5:45 AM, and sunset from 6:09 PM to 5:28 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:256:09
212.75:266:07
312.75:276:06
412.65:276:05
512.65:286:03
612.65:296:02
712.55:296:00
812.55:305:59
912.45:315:58
1012.45:315:56
1112.45:325:55
1212.35:335:53
1312.35:335:52
1412.35:345:51
1512.25:355:49
1612.25:365:48
1712.25:365:46
1812.15:375:45
1912.15:385:43
2012.15:385:42
2112.05:395:41
2212.05:405:39
2312.05:405:38
2411.95:415:36
2511.95:425:35
2611.95:425:33
2711.85:435:32
2811.85:445:31
2911.75:455:29
3011.75:455:28

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.82 kWh/m².

For context, solar energy here swings from a low near 2.35 kWh/m² to a high of 6.18 kWh/m² in May across the year — September's 4.82 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
85.1Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
134.9Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.7Bright
204.7Bright
214.7Bright
224.6Bright
234.6Bright
244.6Bright
254.5Bright
264.5Bright
274.5Bright
284.5Bright
294.4Bright
304.4Bright
Planning a trip in September

Is September a good time to visit Alabaster?

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

5.8
Sightseeing
6th-best month of the year
7.2
Beach & pool
1st-best month of the year

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

What to pack for Alabaster in September

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

In September, Alabaster sees daytime highs around 84°F and nights near 65°F. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Alabaster 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 Alabaster peaks around July 14 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 14UV 10Dec 19UV 3
UV index (midday)Level
Jan4Moderate
Feb5High
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in Alabaster 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 Alabaster is worst in July — around 21 µg/m³ PM2.5 (moderate), about 3.4× the cleanest month (January, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1820 µg/m³Jan 116 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb9Good
Mar11Good
Apr10Good
May13Moderate
Jun17Moderate
Jul21Moderate
Aug18Moderate
Sep14Moderate
Oct10Good
Nov8Good
Dec7Good
Location & terrain

Where is Alabaster?

Alabaster sits at 33.2°N, 86.8°W, 502 ft above sea level, in United States. The nearest listed city is Pelham, 3.1 mi away.

Topography around Alabaster

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

Within 2 miles, the terrain around Alabaster has only modest variations in elevation — a maximum elevation change of 715 ft around an average of 561 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,073 ft; within 50 miles, significant variations in elevation — a maximum elevation change of 1,814 ft.

The land around Alabaster is covered by trees (68%) within 2 miles, trees (79%) within 10 miles, and trees (87%) within 50 miles.

2 miles
715 ft
10 miles
1,073 ft
50 miles
1,814 ft
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Pelham 3.1 mi · Helena 3.7 mi · Hoover 11 mi · Bessemer 14 mi · Vestavia Hills 14 mi · Homewood 16 mi · Hueytown 17 mi · Mountain Brook 18 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 Alabaster (33.2443°, -86.8164°, elevation 502 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).