Trussville weather in September

In September, Trussville sees average daytime highs of 84°F and overnight lows near 65°F, with 3.4 in of rain across 8.2 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 87°F in the first days to 80°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 Trussville's 3rd-clearest and 9th-windiest month. For the whole year in context, see Trussville's year-round climate.

Daytime high
84°
4th warmest
Overnight low
65°
9th coldest
Rainfall
3.4 in
8.2 wet days
Daylight
12 h 12 min
5:35 AM – 5:47 PM
Cloud cover
51%
3rd clearest
Wind
5 mph
9th windiest
Solar energy
4.77 kWh/m²
Travel score
5.9
out of 10

Trussville is city in Jefferson and St. Clair counties in Alabama, United States.

Density
241/km²
people per km²
Founded
1821

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 80°F by the end.

A typical September day in Trussville 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 91°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
48669
58668
68668
78668
88668
98667
108567
118567
128567
138566
148566
158466
168465
178465
188465
198364
208364
218364
228263
238263
248263
258162
268162
278161
288061
298060
308060

How September really feels in Trussville

Once humidity and wind are folded in, September averages 2 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
2
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.

Trussville 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
Jan54° / 36°5.09.80.5103.2
Feb58° / 39°5.110.50.410.84.2
Mar66° / 45°5.711.20.111.75.9
Apr73° / 52°4.59.5012.86.9
May80° / 61°3.910.4013.76.4
Jun86° / 69°4.313.1014.24.6
Jul89° / 72°4.714.60143.8
Aug88° / 71°3.812.4013.24.2
Sep84° / 65°3.48.2012.25.9
Oct74° / 54°3.47.4011.27.4
Nov64° / 44°4.18.1010.36.1
Dec56° / 38°5.310.30.29.83.8

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 19% 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 (%)
15644
25743
35743
45842
55941
66040
76040
86139
96238
106238
116337
126337
136238
146238
156139
166139
176040
185941
195842
205842
215842
225842
235941
245941
255941
265941
276139
286139
296139
306139

Chance of precipitation in September

Any precipitation

Trussville gets around 3.4 in of rain over 8.2 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 28% and peaks near 31% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
131
231
330
430
529
629
728
828
927
1027
1127
1227
1327
1427
1528
1628
1729
1829
1929
2029
2129
2228
2328
2427
2527
2626
2726
2825
2925
3025

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 31% of days. Sticky, muggy-or-worse air turns up on roughly 52% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1251640361
2251740350
3261840330
4361840320
5371940300
6482039290
7482139270
8592238260
95102237250
106112336240
116122435230
127132434220
138142433220
148142532210
159152531200
169162530200
1710172530190
1811172529180
1912172528170
2013182528170
2115182527160
2216182526150
2318192426140
2420192425120
2521192425110
2623192324100
272519232390
282619232390
292819232280
303019222170

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
235calm
245calm
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 5:24 AM to 5:45 AM, and sunset from 6:08 PM to 5:27 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.75:246:08
212.75:256:07
312.75:266:05
412.65:266:04
512.65:276:03
612.65:286:01
712.55:286:00
812.55:295:58
912.55:305:57
1012.45:305:56
1112.45:315:54
1212.35:325:53
1312.35:335:51
1412.35:335:50
1512.25:345:48
1612.25:355:47
1712.25:355:45
1812.15:365:44
1912.15:375:43
2012.15:375:41
2112.05:385:40
2212.05:395:38
2312.05:405:37
2411.95:405:35
2511.95:415:34
2611.85:425:33
2711.85:425:31
2811.85:435:30
2911.75:445:28
3011.75:455:27

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.77 kWh/m².

For context, solar energy here swings from a low near 2.32 kWh/m² to a high of 6.14 kWh/m² in May across the year — September's 4.77 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.0Bright
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
234.5Bright
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 Trussville?

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

5.9
Sightseeing
5th-best month of the year
7.1
Beach & pool
1st-best month of the year

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

What to pack for Trussville in September

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

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

light clothesrain gearsun protection

UV index in Trussville 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 Trussville 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 3 (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 3
UV index (midday)Level
Jan3Moderate
Feb5Moderate
Mar6High
Apr8Very high
May8Very high
Jun10Very high
Jul10Very high
Aug9Very high
Sep8Very high
Oct5High
Nov4Moderate
Dec3Moderate

Air quality in Trussville 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 Trussville is worst in July — around 20 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (January, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1720 µg/m³Jan 116 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb9Good
Mar11Good
Apr11Good
May13Moderate
Jun16Moderate
Jul20Moderate
Aug17Moderate
Sep14Moderate
Oct10Good
Nov8Good
Dec7Good
Location & terrain

Where is Trussville?

Trussville sits at 33.6°N, 86.6°W, 699 ft above sea level, in United States. The nearest listed city is Center Point, 4.3 mi away.

Topography around Trussville

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

Within 2 miles, the terrain around Trussville has only modest variations in elevation — a maximum elevation change of 594 ft around an average of 827 ft above sea level; within 10 miles, significant variations in elevation — a maximum elevation change of 1,352 ft; within 50 miles, large variations in elevation — a maximum elevation change of 2,228 ft.

The land around Trussville is covered by trees (72%) within 2 miles, trees (82%) within 10 miles, and trees (81%) within 50 miles.

2 miles
594 ft
10 miles
1,352 ft
50 miles
2,228 ft
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Center Point 4.3 mi · Dixiana 8.7 mi · Mountain Brook 12 mi · Birmingham 13 mi · Homewood 15 mi · Vestavia Hills 16 mi · Hoover 19 mi · Bessemer 25 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 Trussville (33.6198°, -86.6089°, elevation 699 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).