Long Beach weather in September

In September, Long Beach sees average daytime highs of 82°F and overnight lows near 76°F, with 5.6 in of rain across 12.6 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 2nd-wettest month of the year here.

Highs ease over the month, from about 84°F in the first days to 80°F by the end. The sky is clear or mostly clear about 49% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 42 min by month's end. Set against the rest of the year, September is Long Beach's 4th-clearest and 9th-windiest month. For the whole year in context, see Long Beach's year-round climate.

Daytime high
82°
4th warmest
Overnight low
76°
9th coldest
Rainfall
5.6 in
12.6 wet days
Daylight
12 h 12 min
5:46 AM – 5:56 PM
Cloud cover
47%
4th clearest
Wind
10 mph
9th windiest
Solar energy
5.03 kWh/m²
Travel score
6.0
out of 10

Long Beach is city in Mississippi, United States.

Density
578/km²
people per km²
Founded
1905

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 84°F in the first days to 80°F by the end.

A typical September day in Long Beach reaches about 82°F in the afternoon and slips back to 76°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 79°F and 85°F. Set against its neighbours, September runs about 3°F cooler than August and about 7°F warmer than October.

60°70°80°90°151015202530
Avg high (°F)Avg low (°F)
18479
28478
38378
48378
58378
68378
78378
88378
98378
108378
118377
128377
138377
148277
158277
168277
178276
188276
198276
208276
218175
228175
238175
248175
258074
268074
278074
288073
298073
307973

How September really feels in Long Beach

Once humidity and wind are folded in, September averages 5 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
5
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.

Long Beach weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 2nd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan57° / 49°5.29.910.34.1
Feb60° / 52°4.99.310.94.8
Mar65° / 58°5.49.211.86.2
Apr71° / 65°4.27.812.77.1
May78° / 73°3.89.213.57.2
Jun83° / 78°5.51413.95.5
Jul85° / 80°5.516.813.84.6
Aug85° / 80°6.316.813.14.6
Sep82° / 76°5.612.612.26.0
Oct75° / 68°3.77.511.37.6
Nov66° / 58°4.07.510.56.7
Dec60° / 52°4.79.710.14.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 14% of September, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25545
35644
45644
55743
65842
75941
86040
96139
106139
116238
126238
136436
146436
156436
166535
176535
186535
196535
206535
216535
226535
236634
246634
256634
266634
276733
286733
296832
306832

Chance of precipitation in September

Any precipitation

Long Beach gets around 5.6 in of rain over 12.6 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 42% and peaks near 52% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
152
251
351
450
549
649
748
847
946
1045
1144
1244
1343
1443
1542
1642
1742
1841
1941
2040
2139
2238
2337
2436
2535
2634
2733
2832
2932
3031

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 51% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
101284940
201295038
301295335
4012105433
5022105531
6022115629
7022115827
8022125826
9023135824
10033135823
11033145822
12034155721
13034165720
14035165620
15135175519
16135185419
17145185319
18146195218
19246205018
20256204917
21357214816
22367214715
23478214615
24578214514
25589224413
26689224312
277910224211
287910224110
298101122409
309101222398

Wind in September

Winds average 10 mph in September.

Across September, daily wind ranges from about 9 mph on the calmest days to 10 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
19light breeze
29light breeze
39light breeze
49light breeze
59light breeze
69light breeze
79light breeze
89light breeze
99light breeze
109light breeze
119light breeze
129light breeze
139light breeze
149light breeze
1510light breeze
1610light breeze
1710light breeze
1810light breeze
1910light breeze
2010light breeze
2110light breeze
2210light breeze
2310light breeze
2410light breeze
2510light breeze
2610light breeze
2710light breeze
2810light breeze
2910light breeze
3010light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 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 54 minutes over September. Sunrise moves from 5:37 AM to 5:54 AM, and sunset from 6:16 PM to 5:38 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.65:376:16
212.65:386:14
312.65:386:13
412.65:396:12
512.55:396:11
612.55:406:09
712.55:406:08
812.45:416:07
912.45:426:06
1012.45:426:04
1112.35:436:03
1212.35:436:02
1312.35:446:00
1412.25:445:59
1512.25:455:58
1612.25:465:56
1712.15:465:55
1812.15:475:54
1912.15:475:52
2012.15:485:51
2112.05:485:50
2212.05:495:48
2312.05:505:47
2411.95:505:46
2511.95:515:45
2611.95:515:43
2711.85:525:42
2811.85:525:41
2911.85:535:39
3011.75:545:38

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.03 kWh/m².

For context, solar energy here swings from a low near 2.77 kWh/m² to a high of 6.42 kWh/m² in May across the year — September's 5.03 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
204.9Bright
214.9Bright
224.9Bright
234.9Bright
244.9Bright
254.8Bright
264.8Bright
274.8Bright
284.8Bright
294.8Bright
304.8Bright
Planning a trip in September

Hazard calendar for Long Beach

In seasonPeak

In September, Long Beach sits inside its atlantic hurricane season. The full year is below, with each hazard's peak months called out.

Long Beach sits in the Atlantic hurricane belt; the season peaks August–October.

Atlantic hurricane
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Long Beach?

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

6.0
Sightseeing
6th-best month of the year
6.5
Beach & pool
2nd-best month of the year

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

What to pack for Long Beach in September

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

In September, Long Beach sees daytime highs around 82°F and nights near 76°F. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

Sea temperature near Long Beach in September

The nearest coast averages about 83°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 86°F and coldest in January near 57°F.

It's comfortable for a long swim from Apr 3 to Nov 14 — about 7.4 months when the water holds above 68°F.

50°60°70°80°90°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan57Bracing
Feb59Bracing
Mar64Cool
Apr71Refreshing
May78Warm
Jun83Tropical
Jul85Tropical
Aug86Tropical
Sep83Tropical
Oct76Warm
Nov67Cool
Dec61Cool

UV index in Long Beach in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September 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 Long Beach peaks around July 12 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 19 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highVery highHighModerateJul 12UV 10Dec 19UV 4
UV index (midday)Level
Jan4Moderate
Feb6High
Mar7High
Apr10Very high
May10Very high
Jun10Very high
Jul10Extreme
Aug9Very high
Sep8Very high
Oct6High
Nov5Moderate
Dec4Moderate

Air quality in Long Beach 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 Long Beach is worst in July — around 21 µg/m³ PM2.5 (moderate), about 3.7× the cleanest month (November, 6 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1721 µg/m³Nov 206 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar8Good
Apr9Good
May12Good
Jun17Moderate
Jul21Moderate
Aug17Moderate
Sep10Good
Oct6Good
Nov6Good
Dec6Good
Location & terrain

Where is Long Beach?

Long Beach sits at 30.4°N, 89.2°W, 26 ft above sea level, in United States. The nearest listed city is Gulfport, 3.7 mi away.

Topography around Long Beach

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

Within 2 miles, the terrain around Long Beach has only modest variations in elevation — a maximum elevation change of 69 ft around an average of 20 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 187 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 427 ft.

The land around Long Beach is covered by water (35%) and trees (32%) within 2 miles, water (50%) and trees (31%) within 10 miles, and trees (45%) and water (43%) within 50 miles.

2 miles
69 ft
10 miles
187 ft
50 miles
427 ft
treesgrasslandartificial surfacesbare terrainwaterwetland
September weather nearby: Gulfport 3.7 mi · West Gulfport 5.0 mi · Biloxi 16 mi · Ocean Springs 20 mi · Gautier 32 mi · Pascagoula 35 mi · Slidell 38 mi · Chalmette 56 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 Long Beach (30.3505°, -89.1528°, elevation 26 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. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. 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).