Atlantic City weather in September

In September, Atlantic City sees average daytime highs of 73°F and overnight lows near 67°F, with 3.8 in of rain across 8.3 wet days and about 12.3 hours of daylight. It is the 3rd-warmest and 5th-wettest month of the year here.

Highs ease over the month, from about 76°F in the first days to 70°F by the end. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels muggy.

Daylight stretches from about 12 h 54 min at the start of September to 11 h 36 min by month's end. Set against the rest of the year, September is Atlantic City's 3rd-clearest and 9th-windiest month. For the whole year in context, see Atlantic City's year-round climate.

Daytime high
73°
3rd warmest
Overnight low
67°
10th coldest
Rainfall
3.8 in
8.3 wet days
Daylight
12 h 18 min
5:44 AM – 6:00 PM
Cloud cover
51%
3rd clearest
Wind
11 mph
9th windiest
Solar energy
4.56 kWh/m²
Travel score
7.2
out of 10

Atlantic City is city in Atlantic County, New Jersey, United States.

Density
890/km²
people per km²
Founded
1854

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 76°F in the first days to 70°F by the end.

A typical September day in Atlantic City reaches about 73°F in the afternoon and slips back to 67°F overnight — a 6°F spread between the day's warmth and the night's chill. On most days the high lands between 68°F and 77°F. Set against its neighbours, September runs about 5°F cooler than August and about 9°F warmer than October.

50°60°70°80°151015202530
Avg high (°F)Avg low (°F)
17671
27670
37670
47670
57570
67570
77569
87569
97469
107469
117468
127468
137368
147367
157367
167367
177367
187266
197266
207266
217165
227165
237165
247165
257064
267064
277064
286963
296963
306963

How September really feels in Atlantic City

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.

Atlantic City weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysSnow daysDaylight (hours)Travel score
Jan42° / 33°3.69.72.79.50.2
Feb42° / 33°3.69.22.810.50.2
Mar46° / 38°4.710.41.411.71.4
Apr54° / 47°3.69.60.1133.4
May63° / 56°3.39.4014.15.5
Jun72° / 66°2.98.7014.76.9
Jul78° / 73°3.08.5014.57.1
Aug78° / 72°3.98.9013.57.1
Sep73° / 67°3.88.3012.37.2
Oct64° / 57°4.58.50116.0
Nov54° / 47°3.58.40.19.83.6
Dec47° / 38°4.49.71.19.31.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% 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 43%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16040
26139
36139
46139
56139
66139
76139
86139
96139
106040
116040
126040
135941
145941
155842
165743
175644
185545
195446
205347
215347
225347
235347
245347
255446
265446
275545
285545
295545
305545

Chance of precipitation in September

Any precipitation

Atlantic City gets around 3.8 in of rain over 8.3 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 28% on the wettest days.

0%10%20%30%40%151015202530
Rain chance (%)
125
225
325
425
525
625
725
825
926
1026
1126
1226
1326
1426
1526
1626
1726
1827
1927
2028
2128
2228
2328
2428
2528
2628
2728
2828
2927
3027

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 (%)Miserable (%)
15122430282
26122430271
36122430271
47132429261
58132429251
69142429231
710142429221
811152429211
912152329191
1013162329181
1114162330171
1215172330150
1316172230140
1417182230130
1518182230120
1619182230110
172019223090
182119223080
192219222970
202319222970
212419222960
222519222850
232719222750
242819222640
252919222640
263119222530
273219222430
283419222320
293520212220
303620212120

Wind in September

Winds average 11 mph in September.

Across September, daily wind ranges from about 10 mph on the calmest days to 11 mph at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (mph)Feels
110light breeze
210light breeze
310light breeze
410light breeze
510light breeze
610light breeze
710light breeze
810light breeze
910light breeze
1010light breeze
1110light breeze
1210light breeze
1310light breeze
1410light breeze
1511light breeze
1611light breeze
1711light breeze
1811light breeze
1911light breeze
2011light breeze
2111light breeze
2211light breeze
2311light breeze
2411light breeze
2511light breeze
2611light breeze
2711light breeze
2811light breeze
2911light breeze
3011light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 54 min at the start of September to 11 h 36 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 78 minutes over September. Sunrise moves from 5:30 AM to 5:58 AM, and sunset from 6:25 PM to 5:36 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:306:25
212.95:316:23
312.85:326:21
412.85:336:20
512.75:346:18
612.75:356:16
712.65:366:15
812.65:376:13
912.65:386:11
1012.55:396:10
1112.55:406:08
1212.45:416:06
1312.45:426:05
1412.35:436:03
1512.35:436:01
1612.35:446:00
1712.25:455:58
1812.25:465:56
1912.15:475:55
2012.15:485:53
2112.05:495:51
2212.05:505:49
2311.95:515:48
2411.95:525:46
2511.95:535:44
2611.85:545:43
2711.85:555:41
2811.75:565:39
2911.75:575:38
3011.65:585:36

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.56 kWh/m².

For context, solar energy here swings from a low near 1.93 kWh/m² to a high of 6.54 kWh/m² in June across the year — September's 4.56 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.1Bright
35.1Bright
45.0Bright
55.0Bright
65.0Bright
74.9Bright
84.9Bright
94.9Bright
104.8Bright
114.8Bright
124.7Bright
134.7Bright
144.7Bright
154.6Bright
164.6Bright
174.5Bright
184.5Bright
194.4Bright
204.4Bright
214.3Bright
224.3Bright
234.3Bright
244.2Bright
254.2Bright
264.1Bright
274.1Bright
284.0Bright
294.0Bright
304.0Moderate
Planning a trip in September

Hazard calendar for Atlantic City

In seasonPeak

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

Atlantic City 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 Atlantic City?

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

7.2
Sightseeing
1st-best month of the year
5.3
Beach & pool
3rd-best month of the year

September is one of the better times to visit Atlantic City for general sightseeing.

What to pack for Atlantic City in September

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

In September, Atlantic City sees daytime highs around 73°F and nights near 67°F. Worth packing: light clothes, rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

Sea temperature near Atlantic City in September

The nearest coast averages about 72°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 75°F and coldest in February near 39°F.

It's comfortable for a long swim from Jun 25 to Oct 2 — about 3.3 months when the water holds above 68°F.

30°40°50°60°70°80°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan42Bracing
Feb39Bracing
Mar41Bracing
Apr47Bracing
May56Bracing
Jun66Cool
Jul73Refreshing
Aug75Refreshing
Sep72Refreshing
Oct65Cool
Nov56Bracing
Dec48Bracing

UV index in Atlantic City in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Atlantic City peaks around July 11 at about 8 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 20 at about 2 (low).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 8 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highHighModerateLowJul 11UV 8Dec 20UV 2
UV index (midday)Level
Jan2Low
Feb3Moderate
Mar5Moderate
Apr6High
May8Very high
Jun8Very high
Jul9Very high
Aug6High
Sep6High
Oct4Moderate
Nov3Moderate
Dec2Low
Location & terrain

Where is Atlantic City?

Atlantic City sits at 39.4°N, 74.4°W, 7 ft above sea level, in United States. The nearest listed city is Pleasantville, 5.6 mi away.

Topography around Atlantic City

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

Within 2 miles, the terrain around Atlantic City has only modest variations in elevation — a maximum elevation change of 89 ft around an average of 3 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 135 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 285 ft.

The land around Atlantic City is covered by water (59%) and artificial surfaces (25%) within 2 miles, water (69%) within 10 miles, and water (47%) and trees (39%) within 50 miles.

2 miles
89 ft
10 miles
135 ft
50 miles
285 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Pleasantville 5.6 mi · Ocean Acres 27 mi · South Vineland 33 mi · Millville 33 mi · Vineland 34 mi · Jackson 37 mi · Williamstown 38 mi · Sicklerville 38 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 Atlantic City (39.3642°, -74.4231°, elevation 7 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).